Re-enable disabled tests

Switch to s3 multipart uploads for backups

.github/workflows/build-test.yml

@@ -9,25 +9,48 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    strategy:
+      # Default is true, cancels jobs for other platforms in the matrix if one fails
+      fail-fast: false
+
+      matrix:
+        os: [ ubuntu-20.04 ]
+        go: [ 1.15 ]
+        goos: [ linux ]
+        goarch: [ amd64, arm, arm64 ]
+
+    runs-on: ${{ matrix.os }}
+
     steps:
       - uses: actions/checkout@v2
+
       - uses: actions/setup-go@v2
         with:
-          go-version: '^1.15'
+          go-version: ${{ matrix.go }}
-      
+
       - name: Build
-        run: GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -ldflags "-X github.com/pterodactyl/wings/system.Version=dev-${GIT_COMMIT:0:7}" -o build/wings_linux_amd64 -v wings.go
+        env:
-      
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+        run: |
+          go build -v -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=dev-${GIT_COMMIT:0:7}" -o build/wings_${{ matrix.goos }}_${{ matrix.goarch }} wings.go
+
       - name: Test
         run: go test ./...
-      
+
       - name: Compress binary and make it executable
         if: ${{ github.ref == 'refs/heads/develop' || github.event_name == 'pull_request' }}
-        run: upx build/wings_linux_amd64 && chmod +x build/wings_linux_amd64
+        run: |
-      
+          upx build/wings_${{ matrix.goos }}_${{ matrix.goarch }} && chmod +x build/wings_${{ matrix.goos }}_${{ matrix.goarch }}
+
       - uses: actions/upload-artifact@v2
         if: ${{ github.ref == 'refs/heads/develop' || github.event_name == 'pull_request' }}
         with:
-          name: wings_linux_amd64
+          name: wings_${{ matrix.goos }}_${{ matrix.goarch }}
-          path: build/wings_linux_amd64
+          path: build/wings_${{ matrix.goos }}_${{ matrix.goarch }}
+
+      - uses: actions/upload-artifact@v2
+        if: ${{ github.ref == 'refs/heads/develop' || github.event_name == 'pull_request' }}
+        with:
+          name: wings_${{ matrix.goos }}_${{ matrix.goarch }}
+          path: build/wings_${{ matrix.goos }}_${{ matrix.goarch }}

.github/workflows/release.yml

@@ -8,22 +8,30 @@ on:
 jobs:
   release:
     runs-on: ubuntu-20.04
+
     steps:
       - uses: actions/checkout@v2
+
       - uses: actions/setup-go@v2
         with:
-          go-version: '^1.15'
+          go-version: '1.15.2'
-      
+
       - name: Build
         env:
           REF: ${{ github.ref }}
-        run: GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -ldflags "-X github.com/pterodactyl/wings/system.Version=${REF:11}" -o build/wings_linux_amd64 -v wings.go
+        run: |
-      
+          GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=${REF:11}" -o build/wings_linux_amd64 -v wings.go
+          GOOS=linux GOARCH=arm64 go build -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=${REF:11}" -o build/wings_linux_arm64 -v wings.go
+          GOOS=linux GOARCH=arm go build -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=${REF:11}" -o build/wings_linux_arm -v wings.go
+
       - name: Test
         run: go test ./...
-      
+
       - name: Compress binary and make it executable
-        run: upx --brute build/wings_linux_amd64 && chmod +x build/wings_linux_amd64
+        run: |
+          upx --brute build/wings_linux_amd64 && chmod +x build/wings_linux_amd64
+          upx build/wings_linux_arm64 && chmod +x build/wings_linux_arm64
+          upx build/wings_linux_arm && chmod +x build/wings_linux_arm
 
       - name: Extract changelog
         env:
@@ -35,8 +43,10 @@ jobs:
       - name: Create checksum and add to changelog
         run: |
           SUM=`cd build && sha256sum wings_linux_amd64`
-          echo -e "\n#### SHA256 Checksum\n\n\`\`\`\n$SUM\n\`\`\`\n" >> ./RELEASE_CHANGELOG
+          SUM2=`cd build && sha256sum wings_linux_arm64`
-          echo $SUM > checksum.txt
+          SUM3=`cd build && sha256sum wings_linux_arm`
+          echo -e "\n#### SHA256 Checksum\n\`\`\`\n$SUM\n$SUM2\n$SUM3\n\`\`\`\n" >> ./RELEASE_CHANGELOG
+          echo -e "$SUM\n$SUM2\n$SUM3" > checksums.txt
 
       - name: Create release branch
         env:
@@ -63,9 +73,8 @@ jobs:
           body_path: ./RELEASE_CHANGELOG
           draft: true
           prerelease: ${{ contains(github.ref, 'beta') || contains(github.ref, 'alpha') }}
-      
+
-      - name: Upload binary
+      - name: Upload amd64 Binary
-        id: upload-release-binary 
         uses: actions/upload-release-asset@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -74,14 +83,33 @@ jobs:
           asset_path: build/wings_linux_amd64
           asset_name: wings_linux_amd64
           asset_content_type: application/octet-stream
-      
+
+      - name: Upload arm64 Binary
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: build/wings_linux_arm64
+          asset_name: wings_linux_arm64
+          asset_content_type: application/octet-stream
+
+      - name: Upload arm Binary
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: build/wings_linux_arm
+          asset_name: wings_linux_arm
+          asset_content_type: application/octet-stream
+
       - name: Upload checksum
-        id: upload-release-checksum 
         uses: actions/upload-release-asset@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }} 
-          asset_path: ./checksum.txt
+          asset_path: ./checksums.txt
-          asset_name: checksum.txt
+          asset_name: checksums.txt
           asset_content_type: text/plain

.gitignore

@@ -47,3 +47,5 @@ test_*/
 debug
 data/.states.json
 .DS_Store
+*.pprof
+*.pdf

CHANGELOG.md

@@ -1,5 +1,273 @@
 # Changelog
 
+## v1.1.0
+This release **requires** `Panel@1.1.0` or later to run due to API changes.
+
+### Added
+* Adds support for denying client JWT access to specific token keys generated before Wings starts, or before an arbitrary date from an API call.
+* Adds support for a configurable number of log messages to be returned when connecting to a server socket and requesting the logs.
+* Adds support for both CPU and Memory profiling of Wings via a CLI argument.
+
+### Fixed
+* Errors encountered while uploading files to Wings are now properly reported back to the client rather than causing a generic 500 error.
+* Servers exceeding their disk limit are now properly stopped when they exceed limits while running.
+* Fixes server environment starting as an empty value rather than an "offline" value.
+
+### Changed
+* Cleaned up code internals for handling API requests to make it easier on new developers and use a more sane system.
+* Server configuration retrieval from the Panel is now done in a paginated loop rather than a single large call to allow systems with thousands of instances to boot properly.
+* Switches to multipart S3 uploads to handle backups larger than 5GB in size.
+* Switches the error handling package from `pkg/errors` to `emperror` to avoid overwriting existing stack traces associated with an error and provide additional functionality.
+
+## v1.0.1
+### Added
+* Adds support for ARM to build outputs for wings.
+
+### Fixed
+* Fixed a few docker clients not having version negotiation enabled.
+* Fixes local images prefixed with `~` getting pulled from remote sources rather than just using the local copy.
+* Fixes console output breaking with certain games when excessive line length was output.
+* Fixes an error when console lines were too long that would cause the console to stop updating until the server was restarted,
+
+### Changed
+* Simplified timezone logic for containers by properly grabbing the system timezone and then passing that through to containers with the `TZ=` environment variable.
+
+## v1.0.0
+This is the first official stable release of Wings! Please be aware that while this specific version changelog is very short,
+it technically includes all of the previous beta and alpha releases within it. For the sake of version history and following
+along though, I've only included the differences between this version and the previous RC build.
+
+### Fixed
+* Fixes file parser not properly appending newline character to modified lines.
+* Fixes server disk usage not being properly reported back to the API and websocket.
+
+### Changed
+* Changes diagnostics endpoint URL to be `ptero.co` rather than `hastebin.com`.
+* Diagnostics report now includes system time for easier debugging of logs and container issues.
+
+## v1.0.0-rc.7
+### Fixed
+* **[Security]** Prevents the `allowed_mounts` configuration value from being set by a remote API call.
+* Fixes an unexpected error when attempting to make a copy of an archive file.
+* Fixes certain expected filesystems errors being returned to the API as a 500 error rather than a 4XX series error.
+* Fixes a panic crash when there is no text on a line and the parser is attempting to determine if the line is a comment.
+* Fixes multiple filesystem operations to correctly check, increment, and decrement disk usage for a server.
+* Fixes a negative disk space usage issue when deleting a file due to a bad int swap.
+* Errors from a websocket connection being closed will no longer spam the console.
+* Fixes an extraneous `.` in the install script for servers causing errors in some scenarios.
+* Fixes unexpected error spam due to a change in how `os.ErrNotExist` is returned from some functions.
+
+### Changed
+* Stacktrace is no longer emitted when warning that an image exists locally.
+* Configuration parser now attempts to create the directory structure leading to a configuration file if it is missing.
+* If a file name is too long for the system a nice error is returned to the caller.
+* Enables client version negotiation for Docker to support more versions.
+* Disk space errors are no longer logged into the wings logs.
+* Servers can no longer be reinstalled while another power action is currently running. This avoids data collisions and wings running into issues with the container state.
+* Wings now uses `1024` rather than `1000` bytes when calculating the disk space usage for a server to match how the Panel reports usage.
+* JWT errors in the websocket are now sent back to the connection as a specific event type allowing them to be handled even if the timer fails to execute or executes but is not being listened for.
+* A server struct is no longer embedded in the virtual filesystem allowing for easier testing and modularization of the codebase.
+* Server websockets are now closed when a server is deleted, disconnecting any currently connected clients.
+
+### Removed
+* **[Security]** Removes the `SafeJoin` function which could wrongly assume the state of a file and allow a user to escape the root if the developer implementing the call calls `Stat` rather than `Lstat`.
+
+## v1.0.0-rc.6
+### Fixed
+* Fixes race condition when checking if the running state of a server has changed.
+* Fixes files mistakenly unpacking themselves to the root directory rather than the directory they are told to unpack to.
+* Fixes console output not being sent to the websocket in the same order that it was received.
+* Fixes a file busy error causing a 500 error response when unpacking an archive rather than a 400 error with a message indicating what is wrong to the user.
+* Fixes docker image not properly updating when a server is started.
+
+### Changed
+* Replaces fragile event bus logic with a more robust and easier to understand system. This fixes all remaining console and stats output issues that have been reported.
+* Cleans up API response error messaging to avoid empty errors being logged which cannot be acted upon.
+* Adds support for retrying a file write a few times with a back-off if the file is busy when the write occurs.
+
+### Added
+* Docker image pull data is shown in the console when an admin is connected to the websocket.
+* Adds console throttling to stop a server if too much data is being piped out of the console. This logic mimics the logic present in the old Nodejs daemon, but with a 2x line count limit (1000 -> 2000) per period.
+
+## v1.0.0-rc.5
+### Fixed
+* Fixes long standing bug with console output not properly sending back to the client with server stats in certain edge case scenarios. This was "fixed" in `rc.4` but ended up breaking many servers in significantly more painful manners, but did allow us to better track down the issue.
+* Fixes build flags during release process to correctly strip unnessary code allowing the final binary size to be reduced back down to `~5MB`
+* Fixes Wings returning the last `16384` lines of the log file when connecting to the websocket.
+* Fixes pre-boot actions always running for a server start event even if the server is already running.
+
+### Added
+* Adds support for configuring the amount of time that can elapse between server disk size checking before the value is considered stale.
+
+## v1.0.0-rc.4
+### Fixed
+* Fixes server files being inaccessible if the root data path is a symlink to another location on the machine.
+* Fixes some console output being written to the logs accidentally truncating other lines due to special ANSI sequences being output.
+* Fixes `server.properties` files getting mangled by the automatic configuration editor when booting a server.
+* Fixes a missed stream close when stopping resource polling that would lead to memory leaks.
+* Fixes port bindings being incorrectly re-assigned when using `127.0.0.1` with Docker. These are now properly re-mapped to the `pterodactyl0` interface so that networking operates as expected for the server.
+* Fixes handling of values within arrays in `yaml` and `json` configuration files.
+* Fixes a 304 error being returned rather than a 400 error when a file upload is invalid.
+* Fixes deadlocks and response delays when processing server console and stat events. This was causing server consoles to become completely unresponsive after random periods of time and was only resolvable via a Wings restart.
+
+### Changed
+* Allows a stale value to be present when starting a server if the server is allowed an unlimited amount of disk space.
+* Removed all remaining traces of the `zap` logging library from the codebase.
+* Servers no longer auto-restart as if they crashed when a stop command is manually sent via the server console to the instance.
+* Changes the CORS checks to allow `*` as a remote origin.
+
+### Added
+* Added an auto-generated logrotate file which is written to the normal logrotate directory when wings is first started.
+* Added additional debug logging within the internals of the resource polling for servers to better trace unexpected behavior.
+* Adds additional logic check to avoid even trying to stop a suspended server if it is already stopped.
+
+## v1.0.0-rc.3
+### Fixed
+* Errors during the backup process are now correctly reported to the Panel and logged into the output correctly.
+* Empty directories are no longer pushed into the backup file list (which was causing errors to occur previously).
+* Covered an edge case to prevent errors if a file gets deleted while a backup is in progress.
+* Fixed a bug causing Wings to panic and crash if an invalid environment variable value was passed through. These invalid values are now logged to the output to better detect and an empty string is returned in their place.
+* Fixed startup variables and other server information not properly being updated when a server is restarted.
+* Suspension state of a server is now properly returned by the API.
+* Fixes an error being thrown if a backup does not exist on the local machine. A 404 is now properly returned and handled by the Panel when this occurs.
+* Fixes an error when attempting to move or rename a folder due to the target being created accidentally before the rename occurred.
+* Fixes install scripts running even when the checkbox to not run them on installation was selected in the Panel.
+
+### Changed
+* Disk space checking modified to not block in as many parts of the codebase and allow returning a stale cache value where that is appropriate. Thanks @cyberkitsune!
+* SFTP package code is now merged into the codebase to make keeping up with all of the code simpler, and reduce the complexity of the SFTP server.
+
+### Added
+* Added the ability for a node to be configured to skip file permissions checking when starting a server.
+* Added console output message to indicate that server disk space checking is occurring rather than silently sitting there.
+
+## v1.0.0-rc.2
+### Fixed
+* Fixes significant performance degradation due to excessive `syscall` actions when determining directory sizes on large servers. This was previously causing CPU & I/O lockups on servers and should be significantly more performant and less impactful on the system now.
+* Fixes panic crash when booting wings with no log directory created.
+
+### Changed
+* Changed default interval for disk space calculation from every 60 seconds to every 2.5 minutes.
+
+## v1.0.0-rc.1
+### Fixed
+* Servers are no longer incorrectly marked as stopping when they are, in fact, offline.
+* Release build version is now correctly output when starting wings.
+* Termination signals can now always be sent to a server instance even if the instance is currently starting/stopping.
+* Removed the file chown on wings boot to avoid slowing down the boot process unnecessarily when working with hundreds of servers on a node.
+* Fixed a multitude of race conditions throughout the code that cropped up during testing and made power handling even more robust for server instances.
+* In general multiple fragile areas of the codebase have been improved and are more likely to return useful errors should they break.
+* Addressed serious CPU usage issues when generating backups, and additionally decreased the amount of time they take to generate.
+
+### Changed
+* Internal server now uses more secure and recommended TLS settings.
+* Environment handling is now completely separate from the server package itself, allowing the environments to no longer be tightly coupled to the server.
+* `/tmp` directory mounted into containers can now be programmatically managed and uses better defaults to avoid people even needing to edit it.
+
+### Added
+* Wings logs are now properly persisted to the disk.
+* Adds the ability for an egg to use ANSI-stripped matching when determining if a server is done booting.
+
+## v1.0.0-beta.9
+### Fixed
+* Fixes server resource usage stats not being returned correctly by the API endpoint.
+* Fixes an exception thrown when attempting to write server installation logs.
+* Fixes error handling to provide a more accurate stack-trace in more scenarios where one is missing initially.
+* Fixes a memory leak and zombie event listeners when disconnecting from a server's websocket.
+* Fixes a race condition when wings is attempting to register/de-register event subscribers.
+* Server data directories now correctly have their permissions set recursively when booting Wings.
+* Fixes a race condition when a server's console stream was not fully closed before the next power action was started.
+
+### Changed
+* Server power handling is now handled in a synchronous manner. This avoids endless bugs and race conditions that would crop up if someone triggered two restart processes back to back. The new logic prevents performing any additional power actions until the currently executing action is completed.
+* Server disk usage is now correctly calculated when restarting the daemon as long as the server data directory exists.
+* Multiple code pathways within the boot process were cleaned up and modified to be less IO intensive and overall easier to reason about as a developer.
+* Additional timezone data is now mounted into containers to better improve the ability for instances running to be using the correct timezone.
+
+### Added
+* Adds basic internal file upload endpoints (these are currently not exposed anywhere in the Panel).
+* Added additional process events for installation start and completion.
+* Additional CORS allowed origins for the websocket can now be defined in the configuration file.
+* Adds the ability to authenticate with a docker registry when pulling images.
+
+## v1.0.0-beta.8
+### Fixed
+* Server state is synced with the Panel before performing a reinstall to ensure that the latest information is used.
+* Wings no longer crashes when a non-string environment variable value is passed through.
+* SFTP server authentication no longer attempts to contact the Panel to validate credentials if the format is known to already be incorrect.
+* Some previously missing error stacks are now properly returned when encountered.
+* Renaming a file no longer triggers an error if the base path does not exist.
+* Disk space is now properly calculated for a server even if it is assigned unlimited space.
+* **[Security]** Prevent symlink files from unintentionally chmodding their target file when a server is booted when the target file resides outside the server data directory.
+* **[Security]** Cleans up multiple code pathways that may unintentionally allow a malicious user to impact files outside their home directory.
+* Fixes numerous race conditions during a server's boot process that may lead to unintended data states.
+* Fixes an error thrown when attempting to delete a file that points to a symlink outside the server data directory.
+* Deleting a symlink will no longer attempt to remove the source file, only the symlink itself.
+* Websocket no longer blocks when handling a long running process for a user.
+
+### Changed
+* Install log for servers is now more detailed and more useful for debugging what might be going wrong.
+* Certain file management API endpoints now support passing through multiple paths at once to make mass actions easier to perform.
+* Re-worked file walking implementation to not cause a server crash when working with very large directories, and avoid race conditions when recursively walking directories.
+* Server configuration structure re-worked to be more manageable in the code base and avoid additional race conditions and complexity while making on-the-fly changes to it.
+
+### Added
+* Support for configuring additional file mount points in a container via the Panel.
+* Support for automated SSL certificate generation when booting the Daemon.
+* Added wings diagnostics command.
+* New API endpoints to compress and decompress files on a server.
+
+## v1.0.0-beta.7
+### Fixed
+* Stacktraces are now displayed once in the error output, rather than twice when certain errors are encountered.
+* Additional errors that did not previously output a stack trace have been fixed to output.
+* Fixes a bug where server space available would be triggered when creating a new server from a remote configuration before that file location existed on the disk, leading to an error.
+* Fixes context timeouts while pulling server docker images. Time was upped from 10 seconds to 15 minutes.
+* Configuration file replacement values are now properly de-escaped when writing to the disk. `\/no\/more\/slashes`
+* `.properties` files are now saved correctly to the disk with newlines, rather than shoved on a single line.
+* `./wings configure` command can now properly save the configuration to the disk.
+* Custom SSL locations are no longer obliterated when making changes to the Node's configuration via the Panel.
+
+### Changed
+* Exclusive lock is now acquired when performing a server installation to avoid two install processes being triggered at the same time. This also allows an install to be properly canceled if the server is deleted before it is completed.
+
+## v1.0.0-beta.6
+### Fixed
+* Server status is no longer sent to all connected websocket clients when a new client connects to the socket.
+* Server disk usage is sent back over the socket when connecting.
+* Default configuration for the SFTP server is now properly returned to `on` rather than `off`
+* Server boot is no longer blocked if there is an error fetching the Docker image as long as that image exists on the host.
+* The websocket no longer gets locked up when Wings attempts to send an error to the client.
+* Fixed a crash loop when an error is thrown during pre-boot phase of server startup.
+* Errors with `BindJSON` in API endpoints are now properly handled and returned.
+* Fixed warning about Gin running in non-release mode, even when the binary is running in release mode.
+
+### Changed
+* Switched logging libraries to output data in a clearer format more suited to the CLI where this application runs.
+* Cleaner debug messaging in debug mode from the router.
+
+## v1.0.0-beta.5
+### Fixed
+* Default config location settled on `/etc/pterodactyl/config.yml`; wings will now check all of the previous locations for the configuration and move it automatically to the new location.
+* Deleting a server no longer fails the process if the container cannot be found.
+* Fixes permissions checking for subusers connecting to the SFTP instance.
+* S3 backups now properly send back hash data to the panel.
+* Server installation containers are now always deleted, even if the installer process fails for the instance.
+* Files and folders with special characters and spaces in them no longer return a 404 error.
+* Servers using eggs with bad configurations will no longer cause the daemon to fail booting; these bad configurations are simply skipped over and a warning is emitted into the logs.
+* Environment variables passed to containers no longer contain improper quotes around them.
+* Matching on array indexes in configurations now works correctly; `foo[0]` is quietly transformed into the proper `foo.0` syntax.
+
+### Added
+* New banner error message when the daemon is unable to locate the configuration file. This should better clarify what the user needs to do in order to resolve the issue.
+* Adds ability to configure the default networking driver used by docker.
+
+## v1.0.0-beta.4
+### Fixed
+* Fixes unexpected nil-pointer panic when attempting to start some newly created servers, or any server that was missing a container on the system.
+* Fixes memory usage of process being reported differently than the `docker stats` output leading to some confusion. These numbers should be more correct now.
+* Fixes possible nil-pointer panic when detecting a deleted container as being crashed.
+
 ## v1.0.0-beta.3
 ### Fixed
 * Daemon will no longer crash if someone requests a websocket for a deleted server.
@@ -11,6 +279,39 @@
 ### Changed
 * Memory overhead for containers is now 5/10/15% higher than the passed limit to account for JVM heap and prevent crashing.
 
+## v1.0.0-beta.2
+### Changed
+* Backup functionality made significantly more modular to ease adding additional methods in the future.
+* Websocket permissions changed to use same name as in panel.
+* Container memory hard-limits are now adjusted up by 15% (< 2G memory), 10% (< 4G memory), or 5% to avoid unexpected OOM crashes for memory heavy games.
+* Wings executable is now 80% smaller thanks to better compilation arguments.
+
+### Added
+* Adds support for ignoring files and directories when generating a new backup.
+* Added internal directory walker with callback-continue support.
+
+### Fixed
+* Fixed linux distro matching when booting the daemon.
+* Fixes DNS to be configurable for docker containers that are made for servers.
+* Fixes incorrect file truncation when making modifications to a server's configuration files.
+
+## v1.0.0-beta.1
+### Added
+* Added support for passing specific threads to the docker environment when running a server.
+* Added support for reinstalling an existing server.
+* Added support for restarting a server.
+* Adds support for transferring servers between daemon instances.
+* Added auto-deploy command to fetch configuration from Panel automatically.
+
+### Changed
+* Server file and backup downloads now hit a direct endpoint with a one-time JWT to avoid proxying large downloads through the panel.
+
+### Fixed
+* Fixes a go routine causing a memory and CPU leak.
+* Fixed improper chown of server directories on boot.
+* Miscellaneous fixes to CPU usage, abandoned go-routines, and race conditions.
+* Fixes support for Alpine based systems.
+
 ## v1.0.0-alpha.2
 ### Added
 * Ability to run an installation process for a server and notify the panel when completed.
@@ -20,4 +321,4 @@
 * Fixed bugs caused when unmarshaling data into a struct with default values.
 * Timezone is properly set in containers by using the `TZ=` environment variable rather than mounting timezone data into the filesystem.
 * Server data directly is now properly created when running the install process.
-* Time drift caused in the socket JWT is now handled in a better manner and less likely to unexpectedly error out.
+* Time drift caused in the socket JWT is now handled in a better manner and less likely to unexpectedly error out.

Dockerfile

@@ -2,7 +2,7 @@
 # Pterodactyl Panel Dockerfile
 # ----------------------------------
 
-FROM golang:1.14-alpine
+FROM golang:1.15-alpine
 COPY . /go/wings/
 WORKDIR /go/wings/
 RUN apk add --no-cache upx \
@@ -11,4 +11,4 @@ RUN apk add --no-cache upx \
 
 FROM alpine:latest
 COPY --from=0 /go/wings/wings /usr/bin/
-CMD ["wings","--config", "/var/lib/pterodactyl/config.yml"]
+CMD ["wings","--config", "/etc/pterodactyl/config.yml"]

Makefile

@@ -1,5 +1,6 @@
 build:
-	GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -gcflags "all=-trimpath=$(PWD)" -o build/wings_linux_amd64 -v wings.go
+	GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -gcflags "all=-trimpath=$(pwd)" -o build/wings_linux_amd64 -v wings.go
+	GOOS=linux GOARCH=arm64 go build -ldflags="-s -w" -gcflags "all=-trimpath=$(pwd)" -o build/wings_linux_arm64 -v wings.go
 
 compress:
 	upx --brute build/wings_*

README.md

@@ -1,16 +1,40 @@
-# Alpha Project
+[![Logo Image](https://cdn.pterodactyl.io/logos/new/pterodactyl_logo.png)](https://pterodactyl.io)
-Please refrain from opening PRs or Issues at this time. This project is still under heavy development, and until we have a solid foundation and plan for how everything will connect, we will not be accepting PRs or feature suggestions.
 
-# Pterodactyl wings [![travis](https://img.shields.io/travis/pterodactyl/wings.svg?style=flat-square)](https://travis-ci.org/pterodactyl/wings) [![codacy quality](https://img.shields.io/codacy/grade/27a1576bda86450f853b1052b12fa570.svg?style=flat-square)](https://www.codacy.com/app/schrej/wings/dashboard) [![codacy coverage](https://img.shields.io/codacy/coverage/27a1576bda86450f853b1052b12fa570.svg?style=flat-square)](https://www.codacy.com/app/schrej/wings/files)
+![Discord](https://img.shields.io/discord/122900397965705216?label=Discord&logo=Discord&logoColor=white)
+![GitHub Releases](https://img.shields.io/github/downloads/pterodactyl/wings/latest/total)
+[![Go Report Card](https://goreportcard.com/badge/github.com/pterodactyl/wings)](https://goreportcard.com/report/github.com/pterodactyl/wings)
 
-```
+# Pterodactyl Wings
-                     ____
+Wings is Pterodactyl's server control plane, built for the rapidly changing gaming industry and designed to be
-__ Pterodactyl _____/___/_______ _______ ______
+highly performant and secure. Wings provides an HTTP API allowing you to interface directly with running server
-\_____\    \/\/    /   /       /  __   /   ___/
+instances, fetch server logs, generate backups, and control all aspects of the server lifecycle.
-   \___\          /   /   /   /  /_/  /___   /
-        \___/\___/___/___/___/___    /______/
-                            /_______/ alpha
-```
 
-A new generation of the Pterodactyl daemon, written in go.
+In addition, Wings ships with a built-in SFTP server allowing your system to remain free of Pterodactyl specific
+dependencies, and allowing users to authenticate with the same credentials they would normally use to access the Panel.
 
+## Sponsors
+I would like to extend my sincere thanks to the following sponsors for helping find Pterodactyl's developement.
+[Interested in becoming a sponsor?](https://github.com/sponsors/DaneEveritt)
+
+| Company | About |
+| ------- | ----- |
+| [**WISP**](https://wisp.gg) | Extra features. |
+| [**Bloom.host**](https://bloom.host) | Bloom.host offers dedicated core VPS and Minecraft hosting with Ryzen 9 processors. With owned-hardware, we offer truly unbeatable prices on high-performance hosting. |
+| [**MineStrator**](https://minestrator.com/) | Looking for a French highend hosting company for you minecraft server? More than 14,000 members on our discord, trust us. |
+| [**DedicatedMC**](https://dedicatedmc.io/) | DedicatedMC provides Raw Power hosting at affordable pricing, making sure to never compromise on your performance and giving you the best performance money can buy. |
+| [**Skynode**](https://www.skynode.pro/) | Skynode provides blazing fast game servers along with a top-notch user experience. Whatever our clients are looking for, we're able to provide it! |
+| [**XCORE-SERVER.de**](https://xcore-server.de/) | XCORE-SERVER.de offers High-End Servers for hosting and gaming since 2012. Fast, excellent and well-known for eSports Gaming. |
+| [**RoyaleHosting**](https://royalehosting.net/) |  Build your dreams and deploy them with RoyaleHosting’s reliable servers and network. Easy to use, provisioned in a couple of minutes. |
+| [**Spill Hosting**](https://spillhosting.no/) |  Spill Hosting is a Norwegian hosting service, which aims to cheap services on quality servers. Premium i9-9900K processors will run your game like a dream. |
+| [**DeinServerHost**](https://deinserverhost.de/) |  DeinServerHost offers Dedicated, vps and Gameservers for many popular Games like Minecraft and Rust in Germany since 2013. |
+
+## Documentation
+* [Panel Documentation](https://pterodactyl.io/panel/1.0/getting_started.html)
+* [Wings Documentation](https://pterodactyl.io/wings/1.0/installing.html)
+* [Community Guides](https://pterodactyl.io/community/about.html)
+* Or, get additional help [via Discord](https://discord.gg/pterodactyl)
+
+## Reporting Issues
+Please use the [pterodactyl/panel](https://github.com/pterodactyl/panel) repository to report any issues or make
+feature requests for Wings. In addition, the [security policy](https://github.com/pterodactyl/panel/security/policy) listed
+within that repository also applies to Wings.

api/api.go

@@ -2,11 +2,13 @@ package api
 
 import (
 	"bytes"
+	"emperror.dev/errors"
 	"encoding/json"
 	"fmt"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/system"
+	"io"
 	"io/ioutil"
 	"net/http"
 	"strings"
@@ -14,30 +16,47 @@ import (
 )
 
 // Initializes the requester instance.
-func NewRequester() *PanelRequest {
+func New() *Request {
-	return &PanelRequest{
+	return &Request{}
-		Response: nil,
-	}
 }
 
-type PanelRequest struct {
+// A generic type allowing for easy binding use when making requests to API endpoints
-	Response *http.Response
+// that only expect a singular argument or something that would not benefit from being
+// a typed struct.
+//
+// Inspired by gin.H, same concept.
+type D map[string]interface{}
+
+// Same concept as D, but a map of strings, used for querying GET requests.
+type Q map[string]string
+
+// A custom API requester struct for Wings.
+type Request struct{}
+
+// A custom response type that allows for commonly used error handling and response
+// parsing from the Panel API. This just embeds the normal HTTP response from Go and
+// we attach a few helper functions to it.
+type Response struct {
+	*http.Response
+}
+
+// A pagination struct matching the expected pagination response from the Panel API.
+type Pagination struct {
+	CurrentPage uint `json:"current_page"`
+	From        uint `json:"from"`
+	LastPage    uint `json:"last_page"`
+	PerPage     uint `json:"per_page"`
+	To          uint `json:"to"`
+	Total       uint `json:"total"`
 }
 
 // Builds the base request instance that can be used with the HTTP client.
-func (r *PanelRequest) GetClient() *http.Client {
+func (r *Request) Client() *http.Client {
-	return &http.Client{Timeout: time.Second * 30}
+	return &http.Client{Timeout: time.Second * time.Duration(config.Get().RemoteQuery.Timeout)}
 }
 
-func (r *PanelRequest) SetHeaders(req *http.Request) *http.Request {
+// Returns the given endpoint formatted as a URL to the Panel API.
-	req.Header.Set("Accept", "application/vnd.pterodactyl.v1+json")
+func (r *Request) Endpoint(endpoint string) string {
-	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s.%s", config.Get().AuthenticationTokenId, config.Get().AuthenticationToken))
-
-	return req
-}
-
-func (r *PanelRequest) GetEndpoint(endpoint string) string {
 	return fmt.Sprintf(
 		"%s/api/remote/%s",
 		strings.TrimSuffix(config.Get().PanelLocation, "/"),
@@ -45,9 +64,35 @@ func (r *PanelRequest) GetEndpoint(endpoint string) string {
 	)
 }
 
+// Makes a HTTP request to the given endpoint, attaching the necessary request headers from
+// Wings to ensure that the request is properly handled by the Panel.
+func (r *Request) Make(method, url string, body io.Reader, opts ...func(r *http.Request)) (*Response, error) {
+	req, err := http.NewRequest(method, url, body)
+	if err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+
+	req.Header.Set("User-Agent", fmt.Sprintf("Pterodactyl Wings/v%s (id:%s)", system.Version, config.Get().AuthenticationTokenId))
+	req.Header.Set("Accept", "application/vnd.pterodactyl.v1+json")
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s.%s", config.Get().AuthenticationTokenId, config.Get().AuthenticationToken))
+
+	// Make any options calls that will allow us to make modifications to the request
+	// before it is sent off.
+	for _, cb := range opts {
+		cb(req)
+	}
+
+	r.debug(req)
+
+	res, err := r.Client().Do(req)
+
+	return &Response{Response: res}, err
+}
+
 // Logs the request into the debug log with all of the important request bits.
 // The authorization key will be cleaned up before being output.
-func (r *PanelRequest) logDebug(req *http.Request) {
+func (r *Request) debug(req *http.Request) {
 	headers := make(map[string][]string)
 	for k, v := range req.Header {
 		if k != "Authorization" || len(v) == 0 {
@@ -59,55 +104,50 @@ func (r *PanelRequest) logDebug(req *http.Request) {
 	}
 
 	log.WithFields(log.Fields{
-		"method": req.Method,
+		"method":   req.Method,
 		"endpoint": req.URL.String(),
-		"headers": headers,
+		"headers":  headers,
 	}).Debug("making request to external HTTP endpoint")
 }
 
-func (r *PanelRequest) Get(url string) (*http.Response, error) {
+// Makes a GET request to the given Panel API endpoint. If any data is passed as the
-	c := r.GetClient()
+// second argument it will be passed through on the request as URL parameters.
+func (r *Request) Get(url string, data Q) (*Response, error) {
+	return r.Make(http.MethodGet, r.Endpoint(url), nil, func(r *http.Request) {
+		q := r.URL.Query()
+		for k, v := range data {
+			q.Set(k, v)
+		}
 
-	req, err := http.NewRequest(http.MethodGet, r.GetEndpoint(url), nil)
+		r.URL.RawQuery = q.Encode()
-	req = r.SetHeaders(req)
+	})
-
-	if err != nil {
-		return nil, err
-	}
-
-	r.logDebug(req)
-
-	return c.Do(req)
 }
 
-func (r *PanelRequest) Post(url string, data []byte) (*http.Response, error) {
+// Makes a POST request to the given Panel API endpoint.
-	c := r.GetClient()
+func (r *Request) Post(url string, data interface{}) (*Response, error) {
-
+	b, err := json.Marshal(data)
-	req, err := http.NewRequest(http.MethodPost, r.GetEndpoint(url), bytes.NewBuffer(data))
-	req = r.SetHeaders(req)
-
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
 	}
 
-	r.logDebug(req)
+	return r.Make(http.MethodPost, r.Endpoint(url), bytes.NewBuffer(b))
-
-	return c.Do(req)
 }
 
 // Determines if the API call encountered an error. If no request has been made
-// the response will be false.
+// the response will be false. This function will evaluate to true if the response
-func (r *PanelRequest) HasError() bool {
+// code is anything 300 or higher.
+func (r *Response) HasError() bool {
 	if r.Response == nil {
 		return false
 	}
 
-	return r.Response.StatusCode >= 300 || r.Response.StatusCode < 200
+	return r.StatusCode >= 300 || r.StatusCode < 200
 }
 
 // Reads the body from the response and returns it, then replaces it on the response
-// so that it can be read again later.
+// so that it can be read again later. This does not close the response body, so any
-func (r *PanelRequest) ReadBody() ([]byte, error) {
+// functions calling this should be sure to manually defer a Body.Close() call.
+func (r *Response) Read() ([]byte, error) {
 	var b []byte
 	if r.Response == nil {
 		return nil, errors.New("no response exists on interface")
@@ -122,52 +162,35 @@ func (r *PanelRequest) ReadBody() ([]byte, error) {
 	return b, nil
 }
 
-func (r *PanelRequest) HttpResponseCode() int {
+// Binds a given interface with the data returned in the response. This is a shortcut
-	if r.Response == nil {
+// for calling Read and then manually calling json.Unmarshal on the raw bytes.
-		return 0
+func (r *Response) Bind(v interface{}) error {
+	b, err := r.Read()
+	if err != nil {
+		return errors.WithStackIf(err)
 	}
 
-	return r.Response.StatusCode
+	return errors.WithStackIf(json.Unmarshal(b, &v))
-}
-
-func IsRequestError(err error) bool {
-	_, ok := err.(*RequestError)
-
-	return ok
-}
-
-type RequestError struct {
-	Code   string `json:"code"`
-	Status string `json:"status"`
-	Detail string `json:"detail"`
-}
-
-// Returns the error response in a string form that can be more easily consumed.
-func (re *RequestError) Error() string {
-	return fmt.Sprintf("%s: %s (HTTP/%s)", re.Code, re.Detail, re.Status)
-}
-
-func (re *RequestError) String() string {
-	return re.Error()
-}
-
-type RequestErrorBag struct {
-	Errors []RequestError `json:"errors"`
 }
 
 // Returns the error message from the API call as a string. The error message will be formatted
 // similar to the below example:
 //
 // HttpNotFoundException: The requested resource does not exist. (HTTP/404)
-func (r *PanelRequest) Error() *RequestError {
+func (r *Response) Error() error {
-	body, _ := r.ReadBody()
+	if !r.HasError() {
-
+		return nil
-	bag := RequestErrorBag{}
-	json.Unmarshal(body, &bag)
-
-	if len(bag.Errors) == 0 {
-		return new(RequestError)
 	}
 
-	return &bag.Errors[0]
+	var bag RequestErrorBag
+	_ = r.Bind(&bag)
+
+	e := &RequestError{}
+	if len(bag.Errors) > 0 {
+		e = &bag.Errors[0]
+	}
+
+	e.response = r.Response
+
+	return e
 }

api/backup_endpoints.go

@@ -1,11 +1,37 @@
 package api
 
 import (
-	"encoding/json"
+	"emperror.dev/errors"
 	"fmt"
-	"github.com/pkg/errors"
+	"strconv"
 )
 
+type BackupRemoteUploadResponse struct {
+	CompleteMultipartUpload string   `json:"complete_multipart_upload"`
+	AbortMultipartUpload    string   `json:"abort_multipart_upload"`
+	Parts                   []string `json:"parts"`
+	PartSize                int64    `json:"part_size"`
+}
+
+func (r *Request) GetBackupRemoteUploadURLs(backup string, size int64) (*BackupRemoteUploadResponse, error) {
+	resp, err := r.Get(fmt.Sprintf("/backups/%s", backup), Q{"size": strconv.FormatInt(size, 10)})
+	if err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+	defer resp.Body.Close()
+
+	if resp.HasError() {
+		return nil, resp.Error()
+	}
+
+	var res BackupRemoteUploadResponse
+	if err := resp.Bind(&res); err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+
+	return &res, nil
+}
+
 type BackupRequest struct {
 	Checksum     string `json:"checksum"`
 	ChecksumType string `json:"checksum_type"`
@@ -15,22 +41,12 @@ type BackupRequest struct {
 
 // Notifies the panel that a specific backup has been completed and is now
 // available for a user to view and download.
-func (r *PanelRequest) SendBackupStatus(backup string, data BackupRequest) (*RequestError, error) {
+func (r *Request) SendBackupStatus(backup string, data BackupRequest) error {
-	b, err := json.Marshal(data)
+	resp, err := r.Post(fmt.Sprintf("/backups/%s", backup), data)
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return errors.WithStackIf(err)
-	}
-
-	resp, err := r.Post(fmt.Sprintf("/backups/%s", backup), b)
-	if err != nil {
-		return nil, errors.WithStack(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	return resp.Error()
-	if r.HasError() {
-		return r.Error(), nil
-	}
-
-	return nil, nil
 }

api/error.go

@@ -0,0 +1,33 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+)
+
+type RequestErrorBag struct {
+	Errors []RequestError `json:"errors"`
+}
+
+type RequestError struct {
+	response *http.Response
+	Code     string `json:"code"`
+	Status   string `json:"status"`
+	Detail   string `json:"detail"`
+}
+
+func IsRequestError(err error) bool {
+	_, ok := err.(*RequestError)
+
+	return ok
+}
+
+// Returns the error response in a string form that can be more easily consumed.
+func (re *RequestError) Error() string {
+	c := 0
+	if re.response != nil {
+		c = re.response.StatusCode
+	}
+
+	return fmt.Sprintf("Error response from Panel: %s: %s (HTTP/%d)", re.Code, re.Detail, c)
+}

api/server_endpoints.go

@@ -1,9 +1,15 @@
 package api
 
 import (
+	"context"
+	"emperror.dev/errors"
 	"encoding/json"
 	"fmt"
-	"github.com/pkg/errors"
+	"github.com/apex/log"
+	"github.com/pterodactyl/wings/config"
+	"golang.org/x/sync/errgroup"
+	"strconv"
+	"sync"
 )
 
 const (
@@ -33,157 +39,173 @@ type InstallationScript struct {
 	Script         string `json:"script"`
 }
 
-// GetAllServerConfigurations fetches configurations for all servers assigned to this node.
+type allServerResponse struct {
-func (r *PanelRequest) GetAllServerConfigurations() (map[string]*ServerConfigurationResponse, *RequestError, error) {
+	Data []RawServerData `json:"data"`
-	resp, err := r.Get("/servers")
+	Meta Pagination      `json:"meta"`
+}
+
+type RawServerData struct {
+	Uuid                 string          `json:"uuid"`
+	Settings             json.RawMessage `json:"settings"`
+	ProcessConfiguration json.RawMessage `json:"process_configuration"`
+}
+
+// Fetches all of the server configurations from the Panel API. This will initially load the
+// first 50 servers, and then check the pagination response to determine if more pages should
+// be loaded. If so, those requests are spun-up in additional routines and the final resulting
+// slice of all servers will be returned.
+func (r *Request) GetServers() ([]RawServerData, error) {
+	resp, err := r.Get("/servers", Q{"per_page": strconv.Itoa(int(config.Get().RemoteQuery.BootServersPerPage))})
 	if err != nil {
-		return nil, nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	if resp.HasError() {
-
+		return nil, resp.Error()
-	if r.HasError() {
-		return nil, r.Error(), nil
 	}
 
-	b, _ := r.ReadBody()
+	var res allServerResponse
-	res := map[string]*ServerConfigurationResponse{}
+	if err := resp.Bind(&res); err != nil {
-	if len(b) == 2 {
+		return nil, errors.WithStackIf(err)
-		return res, nil, nil
 	}
 
-	if err := json.Unmarshal(b, &res); err != nil {
+	var mu sync.Mutex
-		return nil, nil, errors.WithStack(err)
+	ret := res.Data
+
+	// Check for pagination, and if it exists we'll need to then make a request to the API
+	// for each page that would exist and get all of the resulting servers.
+	if res.Meta.LastPage > 1 {
+		pp := res.Meta.PerPage
+		log.WithField("per_page", pp).
+			WithField("total_pages", res.Meta.LastPage).
+			Debug("detected multiple pages of server configurations, fetching remaining...")
+
+		g, ctx := errgroup.WithContext(context.Background())
+		for i := res.Meta.CurrentPage + 1; i <= res.Meta.LastPage; i++ {
+			page := strconv.Itoa(int(i))
+
+			g.Go(func() error {
+				select {
+				case <-ctx.Done():
+					return ctx.Err()
+				default:
+					{
+						resp, err := r.Get("/servers", Q{"page": page, "per_page": strconv.Itoa(int(pp))})
+						if err != nil {
+							return err
+						}
+						defer resp.Body.Close()
+
+						if resp.Error() != nil {
+							return resp.Error()
+						}
+
+						var servers allServerResponse
+						if err := resp.Bind(&servers); err != nil {
+							return err
+						}
+
+						mu.Lock()
+						defer mu.Unlock()
+						ret = append(ret, servers.Data...)
+
+						return nil
+					}
+				}
+			})
+		}
+
+		if err := g.Wait(); err != nil {
+			return nil, errors.WithStackIf(err)
+		}
 	}
 
-	return res, nil, nil
+	return ret, nil
 }
 
 // Fetches the server configuration and returns the struct for it.
-func (r *PanelRequest) GetServerConfiguration(uuid string) (*ServerConfigurationResponse, *RequestError, error) {
+func (r *Request) GetServerConfiguration(uuid string) (ServerConfigurationResponse, error) {
-	resp, err := r.Get(fmt.Sprintf("/servers/%s", uuid))
+	var cfg ServerConfigurationResponse
+
+	resp, err := r.Get(fmt.Sprintf("/servers/%s", uuid), nil)
 	if err != nil {
-		return nil, nil, errors.WithStack(err)
+		return cfg, errors.WithStackIf(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	if resp.HasError() {
-
+		return cfg, resp.Error()
-	if r.HasError() {
-		return nil, r.Error(), nil
 	}
 
-	res := &ServerConfigurationResponse{}
+	if err := resp.Bind(&cfg); err != nil {
-	b, _ := r.ReadBody()
+		return cfg, errors.WithStackIf(err)
-
-	if err := json.Unmarshal(b, res); err != nil {
-		return nil, nil, errors.WithStack(err)
 	}
 
-	return res, nil, nil
+	return cfg, nil
 }
 
 // Fetches installation information for the server process.
-func (r *PanelRequest) GetInstallationScript(uuid string) (InstallationScript, *RequestError, error) {
+func (r *Request) GetInstallationScript(uuid string) (InstallationScript, error) {
-	res := InstallationScript{}
+	var is InstallationScript
-
+	resp, err := r.Get(fmt.Sprintf("/servers/%s/install", uuid), nil)
-	resp, err := r.Get(fmt.Sprintf("/servers/%s/install", uuid))
 	if err != nil {
-		return res, nil, errors.WithStack(err)
+		return is, errors.WithStackIf(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	if resp.HasError() {
-
+		return is, resp.Error()
-	if r.HasError() {
-		return res, r.Error(), nil
 	}
 
-	b, _ := r.ReadBody()
+	if err := resp.Bind(&is); err != nil {
-
+		return is, errors.WithStackIf(err)
-	if err := json.Unmarshal(b, &res); err != nil {
-		return res, nil, errors.WithStack(err)
 	}
 
-	return res, nil, nil
+	return is, nil
-}
-
-type installRequest struct {
-	Successful bool `json:"successful"`
 }
 
 // Marks a server as being installed successfully or unsuccessfully on the panel.
-func (r *PanelRequest) SendInstallationStatus(uuid string, successful bool) (*RequestError, error) {
+func (r *Request) SendInstallationStatus(uuid string, successful bool) error {
-	b, err := json.Marshal(installRequest{Successful: successful})
+	resp, err := r.Post(fmt.Sprintf("/servers/%s/install", uuid), D{"successful": successful})
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return errors.WithStackIf(err)
-	}
-
-	resp, err := r.Post(fmt.Sprintf("/servers/%s/install", uuid), b)
-	if err != nil {
-		return nil, errors.WithStack(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	if resp.HasError() {
-	if r.HasError() {
+		return resp.Error()
-		return r.Error(), nil
 	}
 
-	return nil, nil
+	return nil
 }
 
-type archiveRequest struct {
+func (r *Request) SendArchiveStatus(uuid string, successful bool) error {
-	Successful bool `json:"successful"`
+	resp, err := r.Post(fmt.Sprintf("/servers/%s/archive", uuid), D{"successful": successful})
-}
-
-func (r *PanelRequest) SendArchiveStatus(uuid string, successful bool) (*RequestError, error) {
-	b, err := json.Marshal(archiveRequest{Successful: successful})
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return errors.WithStackIf(err)
-	}
-
-	resp, err := r.Post(fmt.Sprintf("/servers/%s/archive", uuid), b)
-	if err != nil {
-		return nil, errors.WithStack(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	return resp.Error()
-	if r.HasError() {
-		return r.Error(), nil
-	}
-
-	return nil, nil
 }
 
-func (r *PanelRequest) SendTransferFailure(uuid string) (*RequestError, error) {
+func (r *Request) SendTransferFailure(uuid string) error {
-	resp, err := r.Get(fmt.Sprintf("/servers/%s/transfer/failure", uuid))
+	resp, err := r.Get(fmt.Sprintf("/servers/%s/transfer/failure", uuid), nil)
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	return resp.Error()
-	if r.HasError() {
-		return r.Error(), nil
-	}
-
-	return nil, nil
 }
 
-func (r *PanelRequest) SendTransferSuccess(uuid string) (*RequestError, error) {
+func (r *Request) SendTransferSuccess(uuid string) error {
-	resp, err := r.Get(fmt.Sprintf("/servers/%s/transfer/success", uuid))
+	resp, err := r.Get(fmt.Sprintf("/servers/%s/transfer/success", uuid), nil)
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	return resp.Error()
-	if r.HasError() {
-		return r.Error(), nil
-	}
-
-	return nil, nil
 }

api/sftp_endpoints.go

@@ -1,41 +1,84 @@
 package api
 
 import (
-	"encoding/json"
+	"emperror.dev/errors"
-	"github.com/pkg/errors"
+	"github.com/apex/log"
-	"github.com/pterodactyl/sftp-server"
+	"regexp"
 )
 
-func (r *PanelRequest) ValidateSftpCredentials(request sftp_server.AuthenticationRequest) (*sftp_server.AuthenticationResponse, error) {
+type SftpAuthRequest struct {
-	b, err := json.Marshal(request)
+	User          string `json:"username"`
-	if err != nil {
+	Pass          string `json:"password"`
-		return nil, err
+	IP            string `json:"ip"`
+	SessionID     []byte `json:"session_id"`
+	ClientVersion []byte `json:"client_version"`
+}
+
+type SftpAuthResponse struct {
+	Server      string   `json:"server"`
+	Token       string   `json:"token"`
+	Permissions []string `json:"permissions"`
+}
+
+type sftpInvalidCredentialsError struct {
+}
+
+func (ice sftpInvalidCredentialsError) Error() string {
+	return "the credentials provided were invalid"
+}
+
+func IsInvalidCredentialsError(err error) bool {
+	_, ok := err.(*sftpInvalidCredentialsError)
+
+	return ok
+}
+
+// Usernames all follow the same format, so don't even bother hitting the API if the username is not
+// at least in the expected format. This is very basic protection against random bots finding the SFTP
+// server and sending a flood of usernames.
+var validUsernameRegexp = regexp.MustCompile(`^(?i)(.+)\.([a-z0-9]{8})$`)
+
+func (r *Request) ValidateSftpCredentials(request SftpAuthRequest) (*SftpAuthResponse, error) {
+	// If the username doesn't meet the expected format that the Panel would even recognize just go ahead
+	// and bail out of the process here to avoid accidentally brute forcing the panel if a bot decides
+	// to connect to spam username attempts.
+	if !validUsernameRegexp.MatchString(request.User) {
+		log.WithFields(log.Fields{
+			"subsystem": "sftp",
+			"username":  request.User,
+			"ip":        request.IP,
+		}).Warn("failed to validate user credentials (invalid format)")
+
+		return nil, new(sftpInvalidCredentialsError)
 	}
 
-	resp, err := r.Post("/sftp/auth", b)
+	resp, err := r.Post("/sftp/auth", request)
 	if err != nil {
 		return nil, err
 	}
 	defer resp.Body.Close()
 
-	r.Response = resp
+	e := resp.Error()
+	if e != nil {
+		if resp.StatusCode >= 400 && resp.StatusCode < 500 {
+			log.WithFields(log.Fields{
+				"subsystem": "sftp",
+				"username":  request.User,
+				"ip":        request.IP,
+			}).Warn(e.Error())
 
-	if r.HasError() {
+			return nil, &sftpInvalidCredentialsError{}
-		if r.HttpResponseCode() >= 400 && r.HttpResponseCode() < 500 {
-			return nil, new(sftp_server.InvalidCredentialsError)
 		}
 
-		rerr := errors.New(r.Error().String())
+		rerr := errors.New(e.Error())
 
 		return nil, rerr
 	}
 
-	response := new(sftp_server.AuthenticationResponse)
+	var response SftpAuthResponse
-	body, _ := r.ReadBody()
+	if err := resp.Bind(&response); err != nil {
-
-	if err := json.Unmarshal(body, response); err != nil {
 		return nil, err
 	}
 
-	return response, nil
+	return &response, nil
-}
+}

cmd/config_finder.go

@@ -57,4 +57,4 @@ func RelocateConfiguration() error {
 	}
 
 	return os.Chmod(config.DefaultLocation, 0600)
-}
+}

cmd/diagnostics.go

@@ -5,26 +5,29 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/pterodactyl/wings/environment"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os/exec"
 	"path"
+	"strconv"
 	"strings"
+	"time"
 
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/AlecAivazis/survey/v2/terminal"
 	"github.com/docker/cli/components/engine/pkg/parsers/operatingsystem"
 	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/client"
 	"github.com/docker/docker/pkg/parsers/kernel"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/system"
 	"github.com/spf13/cobra"
 )
 
-const DefaultHastebinUrl = "https://hastebin.com"
+const DefaultHastebinUrl = "https://ptero.co"
+const DefaultLogLines = 200
 
 var (
 	diagnosticsArgs struct {
@@ -32,6 +35,7 @@ var (
 		IncludeLogs        bool
 		ReviewBeforeUpload bool
 		HastebinURL        string
+		LogLines           int
 	}
 )
 
@@ -43,6 +47,7 @@ var diagnosticsCmd = &cobra.Command{
 
 func init() {
 	diagnosticsCmd.PersistentFlags().StringVar(&diagnosticsArgs.HastebinURL, "hastebin-url", DefaultHastebinUrl, "The url of the hastebin instance to use.")
+	diagnosticsCmd.PersistentFlags().IntVar(&diagnosticsArgs.LogLines, "log-lines", DefaultLogLines, "The number of log lines to include in the report")
 }
 
 // diagnosticsCmdRun collects diagnostics about wings, it's configuration and the node.
@@ -66,7 +71,7 @@ func diagnosticsCmdRun(cmd *cobra.Command, args []string) {
 			Name: "ReviewBeforeUpload",
 			Prompt: &survey.Confirm{
 				Message: "Do you want to review the collected data before uploading to hastebin.com?",
-				Help:    "The data, especially the logs, might contain sensitive information, so you should review it. You will be asked again if you want to uplaod.",
+				Help:    "The data, especially the logs, might contain sensitive information, so you should review it. You will be asked again if you want to upload.",
 				Default: true,
 			},
 		},
@@ -82,38 +87,41 @@ func diagnosticsCmdRun(cmd *cobra.Command, args []string) {
 	_ = dockerInfo
 
 	output := &strings.Builder{}
-	fmt.Fprintln(output, "Pterodactly Wings - Diagnostics Report")
+	fmt.Fprintln(output, "Pterodactyl Wings - Diagnostics Report")
 	printHeader(output, "Versions")
-	fmt.Fprintln(output, "wings:", system.Version)
+	fmt.Fprintln(output, "         wings:", system.Version)
 	if dockerErr == nil {
-		fmt.Fprintln(output, "Docker", dockerVersion.Version)
+		fmt.Fprintln(output, "Docker:", dockerVersion.Version)
 	}
 	if v, err := kernel.GetKernelVersion(); err == nil {
 		fmt.Fprintln(output, "Kernel:", v)
 	}
 	if os, err := operatingsystem.GetOperatingSystem(); err == nil {
-		fmt.Fprintln(output, "OS:", os)
+		fmt.Fprintln(output, "    OS:", os)
 	}
 
 	printHeader(output, "Wings Configuration")
-	if cfg, err := config.ReadConfiguration(config.DefaultLocation); cfg != nil {
+	cfg, err := config.ReadConfiguration(config.DefaultLocation)
-		fmt.Fprintln(output, "Panel Location:", redact(cfg.PanelLocation))
+	if cfg != nil {
-		fmt.Fprintln(output, "Api Host:", redact(cfg.Api.Host))
+		fmt.Fprintln(output, "    Panel Location:", redact(cfg.PanelLocation))
-		fmt.Fprintln(output, "Api Port:", cfg.Api.Port)
+		fmt.Fprintln(output, "")
-		fmt.Fprintln(output, "Api Ssl Enabled:", cfg.Api.Ssl.Enabled)
+		fmt.Fprintln(output, " Internal Webserver:", redact(cfg.Api.Host), ":", cfg.Api.Port)
-		fmt.Fprintln(output, "Api Ssl Certificate:", redact(cfg.Api.Ssl.CertificateFile))
+		fmt.Fprintln(output, "        SSL Enabled:", cfg.Api.Ssl.Enabled)
-		fmt.Fprintln(output, "Api Ssl Key:", redact(cfg.Api.Ssl.KeyFile))
+		fmt.Fprintln(output, "    SSL Certificate:", redact(cfg.Api.Ssl.CertificateFile))
-		fmt.Fprintln(output, "Sftp Address:", redact(cfg.System.Sftp.Address))
+		fmt.Fprintln(output, "            SSL Key:", redact(cfg.Api.Ssl.KeyFile))
-		fmt.Fprintln(output, "Sftp Port:", cfg.System.Sftp.Port)
+		fmt.Fprintln(output, "")
-		fmt.Fprintln(output, "Sftp Read Only:", cfg.System.Sftp.ReadOnly)
+		fmt.Fprintln(output, "        SFTP Server:", redact(cfg.System.Sftp.Address), ":", cfg.System.Sftp.Port)
-		fmt.Fprintln(output, "Sftp Diskchecking Disabled:", cfg.System.Sftp.DisableDiskChecking)
+		fmt.Fprintln(output, "     SFTP Read-Only:", cfg.System.Sftp.ReadOnly)
-		fmt.Fprintln(output, "System Root Directory:", cfg.System.RootDirectory)
+		fmt.Fprintln(output, "")
-		fmt.Fprintln(output, "System Logs Directory:", cfg.System.LogDirectory)
+		fmt.Fprintln(output, "     Root Directory:", cfg.System.RootDirectory)
-		fmt.Fprintln(output, "System Data Directory:", cfg.System.Data)
+		fmt.Fprintln(output, "     Logs Directory:", cfg.System.LogDirectory)
-		fmt.Fprintln(output, "System Archive Directory:", cfg.System.ArchiveDirectory)
+		fmt.Fprintln(output, "     Data Directory:", cfg.System.Data)
-		fmt.Fprintln(output, "System Backup Directory:", cfg.System.BackupDirectory)
+		fmt.Fprintln(output, "  Archive Directory:", cfg.System.ArchiveDirectory)
-		fmt.Fprintln(output, "System Username:", cfg.System.Username)
+		fmt.Fprintln(output, "   Backup Directory:", cfg.System.BackupDirectory)
-		fmt.Fprintln(output, "Debug Enabled:", cfg.Debug)
+		fmt.Fprintln(output, "")
+		fmt.Fprintln(output, "           Username:", cfg.System.Username)
+		fmt.Fprintln(output, "        Server Time:", time.Now().Format(time.RFC1123Z))
+		fmt.Fprintln(output, "         Debug Mode:", cfg.Debug)
 	} else {
 		fmt.Println("Failed to load configuration.", err)
 	}
@@ -132,7 +140,7 @@ func diagnosticsCmdRun(cmd *cobra.Command, args []string) {
 		}
 	}
 	fmt.Fprintln(output, "LoggingDriver:", dockerInfo.LoggingDriver)
-	fmt.Fprintln(output, "CgroupDriver:", dockerInfo.CgroupDriver)
+	fmt.Fprintln(output, " CgroupDriver:", dockerInfo.CgroupDriver)
 	if len(dockerInfo.Warnings) > 0 {
 		for _, w := range dockerInfo.Warnings {
 			fmt.Fprintln(output, w)
@@ -149,7 +157,15 @@ func diagnosticsCmdRun(cmd *cobra.Command, args []string) {
 
 	printHeader(output, "Latest Wings Logs")
 	if diagnosticsArgs.IncludeLogs {
-		fmt.Fprintln(output, "No logs found. Probably because nobody implemented logging to files yet :(")
+		p := "/var/log/pterodactyl/wings.log"
+		if cfg != nil {
+			p = path.Join(cfg.System.LogDirectory, "wings.log")
+		}
+		if c, err := exec.Command("tail", "-n", strconv.Itoa(diagnosticsArgs.LogLines), p).Output(); err != nil {
+			fmt.Fprintln(output, "No logs found or an error occurred.")
+		} else {
+			fmt.Fprintf(output, "%s\n", string(c))
+		}
 	} else {
 		fmt.Fprintln(output, "Logs redacted.")
 	}
@@ -171,7 +187,7 @@ func diagnosticsCmdRun(cmd *cobra.Command, args []string) {
 }
 
 func getDockerInfo() (types.Version, types.Info, error) {
-	cli, err := client.NewClientWithOpts(client.FromEnv)
+	cli, err := environment.DockerClient()
 	if err != nil {
 		return types.Version{}, types.Info{}, err
 	}
@@ -210,7 +226,7 @@ func uploadToHastebin(hbUrl, content string) (string, error) {
 		u.Path = path.Join(u.Path, key)
 		return u.String(), nil
 	}
-	return "", errors.New("Couldn't find key in response")
+	return "", errors.New("failed to find key in response")
 }
 
 func redact(s string) string {

cmd/root.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/NYTimes/logrotate"
 	"github.com/apex/log/handlers/multi"
+	"github.com/docker/docker/client"
 	"github.com/gammazero/workerpool"
 	"golang.org/x/crypto/acme"
 	"net/http"
@@ -18,7 +19,7 @@ import (
 	"github.com/pterodactyl/wings/loggers/cli"
 	"golang.org/x/crypto/acme/autocert"
 
-	"github.com/pkg/errors"
+	"emperror.dev/errors"
 	"github.com/pkg/profile"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
@@ -27,15 +28,16 @@ import (
 	"github.com/pterodactyl/wings/sftp"
 	"github.com/pterodactyl/wings/system"
 	"github.com/spf13/cobra"
-	"go.uber.org/zap"
 )
 
-var configPath = config.DefaultLocation
+var (
-var debug = false
+	profiler        = ""
-var shouldRunProfiler = false
+	configPath      = config.DefaultLocation
-var useAutomaticTls = false
+	debug           = false
-var tlsHostname = ""
+	useAutomaticTls = false
-var showVersion = false
+	tlsHostname     = ""
+	showVersion     = false
+)
 
 var root = &cobra.Command{
 	Use:   "wings",
@@ -54,7 +56,7 @@ func init() {
 	root.PersistentFlags().BoolVar(&showVersion, "version", false, "show the version and exit")
 	root.PersistentFlags().StringVar(&configPath, "config", config.DefaultLocation, "set the location for the configuration file")
 	root.PersistentFlags().BoolVar(&debug, "debug", false, "pass in order to run wings in debug mode")
-	root.PersistentFlags().BoolVar(&shouldRunProfiler, "profile", false, "pass in order to profile wings")
+	root.PersistentFlags().StringVar(&profiler, "profiler", "", "the profiler to run for this instance")
 	root.PersistentFlags().BoolVar(&useAutomaticTls, "auto-tls", false, "pass in order to have wings generate and manage it's own SSL certificates using Let's Encrypt")
 	root.PersistentFlags().StringVar(&tlsHostname, "tls-hostname", "", "required with --auto-tls, the FQDN for the generated SSL certificate")
 
@@ -75,7 +77,7 @@ func readConfiguration() (*config.Configuration, error) {
 	}
 
 	if s, err := os.Stat(p); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	} else if s.IsDir() {
 		return nil, errors.New("cannot use directory as configuration file path")
 	}
@@ -89,15 +91,30 @@ func rootCmdRun(*cobra.Command, []string) {
 		os.Exit(0)
 	}
 
-	if shouldRunProfiler {
+	switch profiler {
-		defer profile.Start().Stop()
+	case "cpu":
+		defer profile.Start(profile.CPUProfile).Stop()
+	case "mem":
+		defer profile.Start(profile.MemProfile).Stop()
+	case "alloc":
+		defer profile.Start(profile.MemProfile, profile.MemProfileAllocs()).Stop()
+	case "heap":
+		defer profile.Start(profile.MemProfile, profile.MemProfileHeap()).Stop()
+	case "routines":
+		defer profile.Start(profile.GoroutineProfile).Stop()
+	case "mutex":
+		defer profile.Start(profile.MutexProfile).Stop()
+	case "threads":
+		defer profile.Start(profile.ThreadcreationProfile).Stop()
+	case "block":
+		defer profile.Start(profile.BlockProfile).Stop()
 	}
 
 	// Only attempt configuration file relocation if a custom location has not
 	// been specified in the command startup.
 	if configPath == config.DefaultLocation {
 		if err := RelocateConfiguration(); err != nil {
-			if os.IsNotExist(err) {
+			if errors.Is(err, os.ErrNotExist) {
 				exitWithConfigurationNotice()
 			}
 
@@ -132,16 +149,26 @@ func rootCmdRun(*cobra.Command, []string) {
 	config.Set(c)
 	config.SetDebugViaFlag(debug)
 
+	if err := c.System.ConfigureTimezone(); err != nil {
+		log.WithField("error", err).Fatal("failed to detect system timezone or use supplied configuration value")
+		return
+	}
+
+	log.WithField("timezone", c.System.Timezone).Info("configured wings with system timezone")
+
 	if err := c.System.ConfigureDirectories(); err != nil {
-		log.WithError(err).Fatal("failed to configure system directories for pterodactyl")
+		log.WithField("error", err).Fatal("failed to configure system directories for pterodactyl")
-		os.Exit(1)
+		return
+	}
+
+	if err := c.System.EnableLogRotation(); err != nil {
+		log.WithField("error", err).Fatal("failed to configure log rotation on the system")
 		return
 	}
 
 	log.WithField("username", c.System.Username).Info("checking for pterodactyl system user")
 	if su, err := c.EnsurePterodactylUser(); err != nil {
-		log.WithError(err).Error("failed to create pterodactyl system user")
+		log.WithField("error", err).Fatal("failed to create pterodactyl system user")
-		os.Exit(1)
 		return
 	} else {
 		log.WithFields(log.Fields{
@@ -158,7 +185,7 @@ func rootCmdRun(*cobra.Command, []string) {
 
 	if err := environment.ConfigureDocker(&c.Docker); err != nil {
 		log.WithField("error", err).Fatal("failed to configure docker environment")
-		os.Exit(1)
+		return
 	}
 
 	if err := c.WriteToDisk(); err != nil {
@@ -170,6 +197,11 @@ func rootCmdRun(*cobra.Command, []string) {
 		log.WithField("server", s.Id()).Info("loaded configuration for server")
 	}
 
+	states, err := server.CachedServerStates()
+	if err != nil {
+		log.WithField("error", errors.WithStackIf(err)).Error("failed to retrieve locally cached server states from disk, assuming all servers in offline state")
+	}
+
 	// Create a new workerpool that limits us to 4 servers being bootstrapped at a time
 	// on Wings. This allows us to ensure the environment exists, write configurations,
 	// and reboot processes without causing a slow-down due to sequential booting.
@@ -179,30 +211,44 @@ func rootCmdRun(*cobra.Command, []string) {
 		s := serv
 
 		pool.Submit(func() {
-			s.Log().Info("ensuring server environment exists")
+			s.Log().Info("configuring server environment and restoring to previous state")
-			// Create a server environment if none exists currently. This allows us to recover from Docker
+
-			// being reinstalled on the host system for example.
+			var st string
-			if err := s.Environment.Create(); err != nil {
+			if state, exists := states[s.Id()]; exists {
-				s.Log().WithField("error", err).Error("failed to process environment")
+				st = state
 			}
 
 			r, err := s.Environment.IsRunning()
-			if err != nil {
+			// We ignore missing containers because we don't want to actually block booting of wings at this
+			// point. If we didn't do this and you pruned all of the images and then started wings you could
+			// end up waiting a long period of time for all of the images to be re-pulled on Wings boot rather
+			// than when the server itself is started.
+			if err != nil && !client.IsErrNotFound(err) {
 				s.Log().WithField("error", err).Error("error checking server environment status")
 			}
 
-			// If the server is currently running on Docker, mark the process as being in that state.
+			// Check if the server was previously running. If so, attempt to start the server now so that Wings
-			// We never want to stop an instance that is currently running external from Wings since
+			// can pick up where it left off. If the environment does not exist at all, just create it and then allow
-			// that is a good way of keeping things running even if Wings gets in a very corrupted state.
+			// the normal flow to execute.
 			//
-			// This will also validate that a server process is running if the last tracked state we have
+			// This does mean that booting wings after a catastrophic machine crash and wiping out the Docker images
-			// is that it was running, but we see that the container process is not currently running.
+			// as a result will result in a slow boot.
-			if r || (!r && s.IsRunning()) {
+			if !r && (st == environment.ProcessRunningState || st == environment.ProcessStartingState) {
+				if err := s.HandlePowerAction(server.PowerActionStart); err != nil {
+					s.Log().WithField("error", errors.WithStackIf(err)).Warn("failed to return server to running state")
+				}
+			} else if r || (!r && s.IsRunning()) {
+				// If the server is currently running on Docker, mark the process as being in that state.
+				// We never want to stop an instance that is currently running external from Wings since
+				// that is a good way of keeping things running even if Wings gets in a very corrupted state.
+				//
+				// This will also validate that a server process is running if the last tracked state we have
+				// is that it was running, but we see that the container process is not currently running.
 				s.Log().Info("detected server is running, re-attaching to process...")
 
-				s.SetState(environment.ProcessRunningState)
+				s.Environment.SetState(environment.ProcessRunningState)
 				if err := s.Environment.Attach(); err != nil {
-					s.Log().WithField("error", errors.WithStack(err)).Warn("failed to attach to running server environment")
+					s.Log().WithField("error", errors.WithStackIf(err)).Warn("failed to attach to running server environment")
 				}
 
 				return
@@ -210,7 +256,7 @@ func rootCmdRun(*cobra.Command, []string) {
 
 			// Addresses potentially invalid data in the stored file that can cause Wings to lose
 			// track of what the actual server state is.
-			_ = s.SetState(environment.ProcessOfflineState)
+			s.Environment.SetState(environment.ProcessOfflineState)
 		})
 	}
 
@@ -218,9 +264,8 @@ func rootCmdRun(*cobra.Command, []string) {
 	pool.StopWait()
 
 	// Initialize the SFTP server.
-	if err := sftp.Initialize(c); err != nil {
+	if err := sftp.Initialize(c.System); err != nil {
-		log.WithError(err).Error("failed to initialize the sftp server")
+		log.WithError(err).Fatal("failed to initialize the sftp server")
-		os.Exit(1)
 		return
 	}
 
@@ -249,34 +294,20 @@ func rootCmdRun(*cobra.Command, []string) {
 		Handler: r,
 
 		TLSConfig: &tls.Config{
-			NextProtos: []string{
+			NextProtos: []string{"h2", "http/1.1"},
-				"h2", // enable HTTP/2
+			// @see https://blog.cloudflare.com/exposing-go-on-the-internet
-				"http/1.1",
-			},
-
-			// https://blog.cloudflare.com/exposing-go-on-the-internet
 			CipherSuites: []uint16{
 				tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
 				tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
-
 				tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
 				tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
-
 				tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
-
 				tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
 			},
-
 			PreferServerCipherSuites: true,
-
+			MinVersion:               tls.VersionTLS12,
-			MinVersion: tls.VersionTLS12,
+			MaxVersion:               tls.VersionTLS13,
-			MaxVersion: tls.VersionTLS13,
+			CurvePreferences:         []tls.CurveID{tls.X25519, tls.CurveP256},
-
-			CurvePreferences: []tls.CurveID{
-				tls.X25519,
-				tls.CurveP256,
-			},
-			// END https://blog.cloudflare.com/exposing-go-on-the-internet
 		},
 	}
 
@@ -338,33 +369,21 @@ func Execute() error {
 // in the code without having to pass around a logger instance.
 func configureLogging(logDir string, debug bool) error {
 	if err := os.MkdirAll(path.Join(logDir, "/install"), 0700); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
-	cfg := zap.NewProductionConfig()
-	if debug {
-		cfg = zap.NewDevelopmentConfig()
-	}
-
-	cfg.Encoding = "console"
-	cfg.OutputPaths = []string{
-		"stdout",
-	}
-
-	logger, err := cfg.Build()
-	if err != nil {
-		return err
-	}
-
-	zap.ReplaceGlobals(logger)
-
 	p := filepath.Join(logDir, "/wings.log")
 	w, err := logrotate.NewFile(p)
 	if err != nil {
-		panic(errors.Wrap(err, "failed to open process log file"))
+		panic(errors.WrapIf(err, "failed to open process log file"))
+	}
+
+	if debug {
+		log.SetLevel(log.DebugLevel)
+	} else {
+		log.SetLevel(log.InfoLevel)
 	}
 
-	log.SetLevel(log.DebugLevel)
 	log.SetHandler(multi.New(
 		cli.Default,
 		cli.New(w.File, false),

config/config.go

@@ -1,11 +1,11 @@
 package config
 
 import (
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/cobaugh/osrelease"
 	"github.com/creasty/defaults"
 	"github.com/gbrlsnchs/jwt/v3"
-	"github.com/pkg/errors"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
@@ -59,11 +59,12 @@ type Configuration struct {
 
 	// The location where the panel is running that this daemon should connect to
 	// to collect data and send events.
-	PanelLocation string `json:"remote" yaml:"remote"`
+	PanelLocation string                   `json:"remote" yaml:"remote"`
+	RemoteQuery   RemoteQueryConfiguration `json:"remote_query" yaml:"remote_query"`
 
 	// AllowedMounts is a list of allowed host-system mount points.
 	// This is required to have the "Server Mounts" feature work properly.
-	AllowedMounts []string `json:"allowed_mounts" yaml:"allowed_mounts"`
+	AllowedMounts []string `json:"-" yaml:"allowed_mounts"`
 
 	// AllowedOrigins is a list of allowed request origins.
 	// The Panel URL is automatically allowed, this is only needed for adding
@@ -73,9 +74,6 @@ type Configuration struct {
 
 // Defines the configuration of the internal SFTP server.
 type SftpConfiguration struct {
-	// If set to true disk checking will not be performed. This will prevent the SFTP
-	// server from checking the total size of a directory when uploading files.
-	DisableDiskChecking bool `default:"false" yaml:"disable_disk_checking"`
 	// The bind address of the SFTP server.
 	Address string `default:"0.0.0.0" json:"bind_address" yaml:"bind_address"`
 	// The bind port of the SFTP server.
@@ -104,6 +102,27 @@ type ApiConfiguration struct {
 	UploadLimit int `default:"100" json:"upload_limit" yaml:"upload_limit"`
 }
 
+// Defines the configuration settings for remote requests from Wings to the Panel.
+type RemoteQueryConfiguration struct {
+	// The amount of time in seconds that Wings should allow for a request to the Panel API
+	// to complete. If this time passes the request will be marked as failed. If your requests
+	// are taking longer than 30 seconds to complete it is likely a performance issue that
+	// should be resolved on the Panel, and not something that should be resolved by upping this
+	// number.
+	Timeout uint `default:"30" yaml:"timeout"`
+
+	// The number of servers to load in a single request to the Panel API when booting the
+	// Wings instance. A single request is initially made to the Panel to get this number
+	// of servers, and then the pagination status is checked and additional requests are
+	// fired off in parallel to request the remaining pages.
+	//
+	// It is not recommended to change this from the default as you will likely encounter
+	// memory limits on your Panel instance. In the grand scheme of things 4 requests for
+	// 50 servers is likely just as quick as two for 100 or one for 400, and will certainly
+	// be less likely to cause performance issues on the Panel.
+	BootServersPerPage uint `default:"50" yaml:"boot_servers_per_page"`
+}
+
 // Reads the configuration from the provided file and returns the configuration
 // object that can then be used.
 func ReadConfiguration(path string) (*Configuration, error) {
@@ -179,7 +198,7 @@ func GetJwtAlgorithm() *jwt.HMACSHA {
 func NewFromPath(path string) (*Configuration, error) {
 	c := new(Configuration)
 	if err := defaults.Set(c); err != nil {
-		return c, errors.WithStack(err)
+		return c, errors.WithStackIf(err)
 	}
 
 	c.unsafeSetPath(path)
@@ -188,7 +207,7 @@ func NewFromPath(path string) (*Configuration, error) {
 }
 
 // Sets the path where the configuration file is located on the server. This function should
-// not be called except by processes that are generating the configuration such as the configration
+// not be called except by processes that are generating the configuration such as the configuration
 // command shipped with this software.
 func (c *Configuration) unsafeSetPath(path string) {
 	c.Lock()
@@ -217,12 +236,12 @@ func (c *Configuration) EnsurePterodactylUser() (*user.User, error) {
 	if err == nil {
 		return u, c.setSystemUser(u)
 	} else if _, ok := err.(user.UnknownUserError); !ok {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 
 	sysName, err := getSystemName()
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 
 	var command = fmt.Sprintf("useradd --system --no-create-home --shell /bin/false %s", c.System.Username)
@@ -235,17 +254,17 @@ func (c *Configuration) EnsurePterodactylUser() (*user.User, error) {
 		// We have to create the group first on Alpine, so do that here before continuing on
 		// to the user creation process.
 		if _, err := exec.Command("addgroup", "-S", c.System.Username).Output(); err != nil {
-			return nil, errors.WithStack(err)
+			return nil, errors.WithStackIf(err)
 		}
 	}
 
 	split := strings.Split(command, " ")
 	if _, err := exec.Command(split[0], split[1:]...).Output(); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 
 	if u, err := user.Lookup(c.System.Username); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	} else {
 		return u, c.setSystemUser(u)
 	}
@@ -287,11 +306,11 @@ func (c *Configuration) WriteToDisk() error {
 
 	b, err := yaml.Marshal(&ccopy)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	if err := ioutil.WriteFile(c.GetPath(), b, 0644); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -301,7 +320,7 @@ func (c *Configuration) WriteToDisk() error {
 func getSystemName() (string, error) {
 	// use osrelease to get release version and ID
 	if release, err := osrelease.Read(); err != nil {
-		return "", errors.WithStack(err)
+		return "", errors.WithStackIf(err)
 	} else {
 		return release["ID"], nil
 	}

config/config_docker.go

@@ -1,10 +1,10 @@
 package config
 
 import (
+	"emperror.dev/errors"
 	"encoding/base64"
 	"encoding/json"
 	"github.com/docker/docker/api/types"
-	"github.com/pkg/errors"
 )
 
 type dockerNetworkInterfaces struct {
@@ -49,18 +49,6 @@ type DockerConfiguration struct {
 	// Domainname is the Docker domainname for all containers.
 	Domainname string `default:"" json:"domainname" yaml:"domainname"`
 
-	// If true, container images will be updated when a server starts if there
-	// is an update available. If false the daemon will not attempt updates and will
-	// defer to the host system to manage image updates.
-	UpdateImages bool `default:"true" json:"update_images" yaml:"update_images"`
-
-	// The location of the Docker socket.
-	Socket string `default:"/var/run/docker.sock" json:"socket" yaml:"socket"`
-
-	// Defines the location of the timezone file on the host system that should
-	// be mounted into the created containers so that they all use the same time.
-	TimezonePath string `default:"/etc/timezone" json:"timezone_path" yaml:"timezone_path"`
-
 	// Registries .
 	Registries map[string]RegistryConfiguration `json:"registries" yaml:"registries"`
 
@@ -85,7 +73,7 @@ func (c RegistryConfiguration) Base64() (string, error) {
 
 	b, err := json.Marshal(authConfig)
 	if err != nil {
-		return "", errors.WithStack(err)
+		return "", errors.WithStackIf(err)
 	}
 
 	return base64.URLEncoding.EncodeToString(b), nil

config/config_system.go

@@ -1,9 +1,18 @@
 package config
 
 import (
+	"context"
+	"emperror.dev/errors"
+	"fmt"
 	"github.com/apex/log"
+	"html/template"
+	"io/ioutil"
 	"os"
+	"os/exec"
 	"path"
+	"path/filepath"
+	"regexp"
+	"time"
 )
 
 // Defines basic system configuration settings.
@@ -26,6 +35,13 @@ type SystemConfiguration struct {
 	// The user that should own all of the server files, and be used for containers.
 	Username string `default:"pterodactyl" yaml:"username"`
 
+	// The timezone for this Wings instance. This is detected by Wings automatically if possible,
+	// and falls back to UTC if not able to be detected. If you need to set this manually, that
+	// can also be done.
+	//
+	// This timezone value is passed into all containers created by Wings.
+	Timezone string `yaml:"timezone"`
+
 	// Definitions for the user that gets created to ensure that we can quickly access
 	// this information without constantly having to do a system lookup.
 	User struct {
@@ -33,11 +49,30 @@ type SystemConfiguration struct {
 		Gid int
 	}
 
+	// The amount of time in seconds that can elapse before a server's disk space calculation is
+	// considered stale and a re-check should occur. DANGER: setting this value too low can seriously
+	// impact system performance and cause massive I/O bottlenecks and high CPU usage for the Wings
+	// process.
+	DiskCheckInterval int64 `default:"150" yaml:"disk_check_interval"`
+
 	// Determines if Wings should detect a server that stops with a normal exit code of
 	// "0" as being crashed if the process stopped without any Wings interaction. E.g.
 	// the user did not press the stop button, but the process stopped cleanly.
 	DetectCleanExitAsCrash bool `default:"true" yaml:"detect_clean_exit_as_crash"`
 
+	// If set to true, file permissions for a server will be checked when the process is
+	// booted. This can cause boot delays if the server has a large amount of files. In most
+	// cases disabling this should not have any major impact unless external processes are
+	// frequently modifying a servers' files.
+	CheckPermissionsOnBoot bool `default:"true" yaml:"check_permissions_on_boot"`
+
+	// If set to false Wings will not attempt to write a log rotate configuration to the disk
+	// when it boots and one is not detected.
+	EnableLogRotate bool `default:"true" yaml:"enable_log_rotate"`
+
+	// The number of lines to send when a server connects to the websocket.
+	WebsocketLogCount int `default:"150" yaml:"websocket_log_count"`
+
 	Sftp SftpConfiguration `yaml:"sftp"`
 }
 
@@ -49,6 +84,22 @@ func (sc *SystemConfiguration) ConfigureDirectories() error {
 		return err
 	}
 
+	// There are a non-trivial number of users out there whose data directories are actually a
+	// symlink to another location on the disk. If we do not resolve that final destination at this
+	// point things will appear to work, but endless errors will be encountered when we try to
+	// verify accessed paths since they will all end up resolving outside the expected data directory.
+	//
+	// For the sake of automating away as much of this as possible, see if the data directory is a
+	// symlink, and if so resolve to its final real path, and then update the configuration to use
+	// that.
+	if d, err := filepath.EvalSymlinks(sc.Data); err != nil {
+		if !os.IsNotExist(err) {
+			return errors.WithStackIf(err)
+		}
+	} else if d != sc.Data {
+		sc.Data = d
+	}
+
 	log.WithField("path", sc.Data).Debug("ensuring server data directory exists")
 	if err := os.MkdirAll(sc.Data, 0700); err != nil {
 		return err
@@ -67,6 +118,61 @@ func (sc *SystemConfiguration) ConfigureDirectories() error {
 	return nil
 }
 
+// Writes a logrotate file for wings to the system logrotate configuration directory if one
+// exists and a logrotate file is not found. This allows us to basically automate away the log
+// rotation for most installs, but also enable users to make modifications on their own.
+func (sc *SystemConfiguration) EnableLogRotation() error {
+	// Do nothing if not enabled.
+	if sc.EnableLogRotate == false {
+		log.Info("skipping log rotate configuration, disabled in wings config file")
+
+		return nil
+	}
+
+	if st, err := os.Stat("/etc/logrotate.d"); err != nil && !os.IsNotExist(err) {
+		return errors.WithStackIf(err)
+	} else if (err != nil && os.IsNotExist(err)) || !st.IsDir() {
+		return nil
+	}
+
+	if _, err := os.Stat("/etc/logrotate.d/wings"); err != nil && !os.IsNotExist(err) {
+		return errors.WithStackIf(err)
+	} else if err == nil {
+		return nil
+	}
+
+	log.Info("no log rotation configuration found, system is configured to support it, adding file now")
+	// If we've gotten to this point it means the logrotate directory exists on the system
+	// but there is not a file for wings already. In that case, let us write a new file to
+	// it so files can be rotated easily.
+	f, err := os.Create("/etc/logrotate.d/wings")
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+	defer f.Close()
+
+	t, err := template.New("logrotate").Parse(`
+{{.LogDirectory}}/wings.log {
+    size 10M
+    compress
+    delaycompress
+    dateext
+    maxage 7
+    missingok
+    notifempty
+    create 0640 {{.User.Uid}} {{.User.Gid}}
+    postrotate
+        killall -SIGHUP wings
+    endscript
+}`)
+
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	return errors.WrapIf(t.Execute(f, sc), "failed to write logrotate file to disk")
+}
+
 // Returns the location of the JSON file that tracks server states.
 func (sc *SystemConfiguration) GetStatesPath() string {
 	return path.Join(sc.RootDirectory, "states.json")
@@ -76,3 +182,47 @@ func (sc *SystemConfiguration) GetStatesPath() string {
 func (sc *SystemConfiguration) GetInstallLogPath() string {
 	return path.Join(sc.LogDirectory, "install/")
 }
+
+// Configures the timezone data for the configuration if it is currently missing. If
+// a value has been set, this functionality will only run to validate that the timezone
+// being used is valid.
+func (sc *SystemConfiguration) ConfigureTimezone() error {
+	if sc.Timezone == "" {
+		if b, err := ioutil.ReadFile("/etc/timezone"); err != nil {
+			if !os.IsNotExist(err) {
+				return errors.WrapIf(err, "failed to open /etc/timezone for automatic server timezone calibration")
+			}
+
+			ctx, _ := context.WithTimeout(context.Background(), time.Second*5)
+			// Okay, file isn't found on this OS, we will try using timedatectl to handle this. If this
+			// command fails, exit, but if it returns a value use that. If no value is returned we will
+			// fall through to UTC to get Wings booted at least.
+			out, err := exec.CommandContext(ctx, "timedatectl").Output()
+			if err != nil {
+				log.WithField("error", err).Warn("failed to execute \"timedatectl\" to determine system timezone, falling back to UTC")
+
+				sc.Timezone = "UTC"
+				return nil
+			}
+
+			r := regexp.MustCompile(`Time zone: ([\w/]+)`)
+			matches := r.FindSubmatch(out)
+			if len(matches) != 2 || string(matches[1]) == "" {
+				log.Warn("failed to parse timezone from \"timedatectl\" output, falling back to UTC")
+
+				sc.Timezone = "UTC"
+				return nil
+			}
+
+			sc.Timezone = string(matches[1])
+		} else {
+			sc.Timezone = string(b)
+		}
+	}
+
+	sc.Timezone = regexp.MustCompile(`(?i)[^a-z_/]+`).ReplaceAllString(sc.Timezone, "")
+
+	_, err := time.LoadLocation(sc.Timezone)
+
+	return errors.WrapIf(err, fmt.Sprintf("the supplied timezone %s is invalid", sc.Timezone))
+}

config/config_throttles.go

@@ -1,23 +1,27 @@
 package config
 
 type ConsoleThrottles struct {
-	// Wether or not the throttler is enabled for this instance.
+	// Whether or not the throttler is enabled for this instance.
 	Enabled bool `json:"enabled" yaml:"enabled" default:"true"`
 
-	// The total number of throttle activations that must accumulate before a server is
+	// The total number of lines that can be output in a given LineResetInterval period before
-	// forcibly stopped for violating these limits.
-	KillAtCount uint64 `json:"kill_at_count" yaml:"kill_at_count" default:"5"`
-
-	// The amount of time in milliseconds that a server process must go through without
-	// triggering an output warning before the throttle activation count begins decreasing.
-	// This time is measured in milliseconds.
-	Decay uint64 `json:"decay" yaml:"decay" default:"10000"`
-
-	// The total number of lines that can be output in a given CheckInterval period before
 	// a warning is triggered and counted against the server.
-	Lines uint64 `json:"lines" yaml:"lines" default:"1000"`
+	Lines uint64 `json:"lines" yaml:"lines" default:"2000"`
 
-	// The amount of time that must pass between intervals before the count is reset. This
+	// The total number of throttle activations that can accumulate before a server is considered
-	// value is in milliseconds.
+	// to be breaching and will be stopped. This value is decremented by one every DecayInterval.
-	CheckInterval uint64 `json:"check_interval" yaml:"check_interval" default:"100"`
+	MaximumTriggerCount uint64 `json:"maximum_trigger_count" yaml:"maximum_trigger_count" default:"5"`
-}
+
+	// The amount of time after which the number of lines processed is reset to 0. This runs in
+	// a constant loop and is not affected by the current console output volumes. By default, this
+	// will reset the processed line count back to 0 every 100ms.
+	LineResetInterval uint64 `json:"line_reset_interval" yaml:"line_reset_interval" default:"100"`
+
+	// The amount of time in milliseconds that must pass without an output warning being triggered
+	// before a throttle activation is decremented.
+	DecayInterval uint64 `json:"decay_interval" yaml:"decay_interval" default:"10000"`
+
+	// The amount of time that a server is allowed to be stopping for before it is terminated
+	// forfully if it triggers output throttles.
+	StopGracePeriod uint `json:"stop_grace_period" yaml:"stop_grace_period" default:"15"`
+}

docker-compose.example.yml

@@ -1,26 +1,35 @@
-version: '3'
+version: '3.5'
 services:
   daemon:
     build: .
     restart: always
-    hostname: daemon
+    networks:
+      - daemon0
     ports:
       - "8080:8080"
       - "2022:2022"
     tty: true
     environment:
       - "DEBUG=false"
+      - "TZ=UTC" # change to the three letter timezone of your choosing
     volumes:
       - "/var/run/docker.sock:/var/run/docker.sock"
       - "/var/lib/docker/containers/:/var/lib/docker/containers/"
+      - "/etc/pterodactyl/:/etc/pterodactyl/"
       - "/var/lib/pterodactyl/:/var/lib/pterodactyl/"
-      - "/srv/daemon-data/:/srv/daemon-data/"
+      - "/var/log/pterodactyl/:/var/log/pterodactyl/"
       - "/tmp/pterodactyl/:/tmp/pterodactyl/"
-      - "/etc/timezone:/etc/timezone:ro"
+      ## you may need /srv/daemon-data if you are upgrading from an old daemon
+      ## - "/srv/daemon-data/:/srv/daemon-data/"
       ## Required for ssl if you user let's encrypt. uncomment to use.
       ## - "/etc/letsencrypt/:/etc/letsencrypt/"
+
 networks:
-  default:
+  daemon0:
+    name: daemon0
+    driver: bridge
     ipam:
       config:
-        - subnet: 172.21.0.0/16
+        - subnet: "172.21.0.0/16"
+    driver_opts:
+      com.docker.network.bridge.name: daemon0

environment/allocations.go

@@ -3,6 +3,7 @@ package environment
 import (
 	"fmt"
 	"github.com/docker/go-connections/nat"
+	"github.com/pterodactyl/wings/config"
 	"strconv"
 )
 
@@ -25,6 +26,8 @@ type Allocations struct {
 // Converts the server allocation mappings into a format that can be understood by Docker. While
 // we do strive to support multiple environments, using Docker's standardized format for the
 // bindings certainly makes life a little easier for managing things.
+//
+// You'll want to use DockerBindings() if you need to re-map 127.0.0.1 to the Docker interface.
 func (a *Allocations) Bindings() nat.PortMap {
 	var out = nat.PortMap{}
 
@@ -50,18 +53,49 @@ func (a *Allocations) Bindings() nat.PortMap {
 	return out
 }
 
+// Returns the bindings for the server in a way that is supported correctly by Docker. This replaces
+// any reference to 127.0.0.1 with the IP of the pterodactyl0 network interface which will allow the
+// server to operate on a local address while still being accessible by other containers.
+func (a *Allocations) DockerBindings() nat.PortMap {
+	iface := config.Get().Docker.Network.Interface
+
+	out := a.Bindings()
+	// Loop over all of the bindings for this container, and convert any that reference 127.0.0.1
+	// to use the pterodactyl0 network interface IP, as that is the true local for what people are
+	// trying to do when creating servers.
+	for p, binds := range out {
+		for i, alloc := range binds {
+			if alloc.HostIP != "127.0.0.1" {
+				continue
+			}
+
+			// If using ISPN just delete the local allocation from the server.
+			if config.Get().Docker.Network.ISPN {
+				out[p] = append(out[p][:i], out[p][i+1:]...)
+			} else {
+				out[p][i] = nat.PortBinding{
+					HostIP:   iface,
+					HostPort: alloc.HostPort,
+				}
+			}
+		}
+	}
+
+	return out
+}
+
 // Converts the server allocation mappings into a PortSet that can be understood
 // by Docker. This formatting is slightly different than "Bindings" as it should
 // return an empty struct rather than a binding.
 //
-// To accomplish this, we'll just get the values from "Bindings" and then set them
+// To accomplish this, we'll just get the values from "DockerBindings" and then set them
 // to empty structs. Because why not.
 func (a *Allocations) Exposed() nat.PortSet {
 	var out = nat.PortSet{}
 
-	for port := range a.Bindings() {
+	for port := range a.DockerBindings() {
 		out[port] = struct{}{}
 	}
 
 	return out
-}
+}

environment/config.go

@@ -1,17 +1,13 @@
 package environment
 
 import (
-	"fmt"
-	"strings"
 	"sync"
-	"time"
 )
 
-type configurationSettings struct {
+type Settings struct {
 	Mounts      []Mount
 	Allocations Allocations
 	Limits      Limits
-	Variables   Variables
 }
 
 // Defines the actual configuration struct for the environment with all of the settings
@@ -19,20 +15,36 @@ type configurationSettings struct {
 type Configuration struct {
 	mu sync.RWMutex
 
-	settings configurationSettings
+	environmentVariables []string
+	settings             Settings
 }
 
-func NewConfiguration(m []Mount, a Allocations, l Limits, v Variables) *Configuration {
+// Returns a new environment configuration with the given settings and environment variables
+// defined within it.
+func NewConfiguration(s Settings, envVars []string) *Configuration {
 	return &Configuration{
-		settings: configurationSettings{
+		environmentVariables: envVars,
-			Mounts:      m,
+		settings:             s,
-			Allocations: a,
-			Limits:      l,
-			Variables:   v,
-		},
 	}
 }
 
+// Updates the settings struct for this environment on the fly. This allows modified servers to
+// automatically push those changes to the environment.
+func (c *Configuration) SetSettings(s Settings) {
+	c.mu.Lock()
+	c.settings = s
+	c.mu.Unlock()
+}
+
+// Updates the environment variables associated with this environment by replacing the entire
+// array of them with a new one.
+func (c *Configuration) SetEnvironmentVariables(ev []string) {
+	c.mu.Lock()
+	c.environmentVariables = ev
+	c.mu.Unlock()
+}
+
+// Returns the limits assigned to this environment.
 func (c *Configuration) Limits() Limits {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
@@ -40,6 +52,7 @@ func (c *Configuration) Limits() Limits {
 	return c.settings.Limits
 }
 
+// Returns the allocations associated with this environment.
 func (c *Configuration) Allocations() Allocations {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
@@ -47,6 +60,7 @@ func (c *Configuration) Allocations() Allocations {
 	return c.settings.Allocations
 }
 
+// Returns all of the mounts associated with this environment.
 func (c *Configuration) Mounts() []Mount {
 	c.mu.RLock()
 	defer c.mu.RUnlock()
@@ -54,31 +68,10 @@ func (c *Configuration) Mounts() []Mount {
 	return c.settings.Mounts
 }
 
-// Returns all of the environment variables that should be assigned to a running
+// Returns the environment variables associated with this instance.
-// server instance.
 func (c *Configuration) EnvironmentVariables() []string {
 	c.mu.RLock()
-	c.mu.RUnlock()
+	defer c.mu.RUnlock()
 
-	zone, _ := time.Now().In(time.Local).Zone()
+	return c.environmentVariables
-
-	var out = []string{
-		fmt.Sprintf("TZ=%s", zone),
-		fmt.Sprintf("SERVER_MEMORY=%d", c.settings.Limits.MemoryLimit),
-		fmt.Sprintf("SERVER_IP=%s", c.settings.Allocations.DefaultMapping.Ip),
-		fmt.Sprintf("SERVER_PORT=%d", c.settings.Allocations.DefaultMapping.Port),
-	}
-
-eloop:
-	for k := range c.settings.Variables {
-		for _, e := range out {
-			if strings.HasPrefix(e, strings.ToUpper(k)) {
-				continue eloop
-			}
-		}
-
-		out = append(out, fmt.Sprintf("%s=%s", strings.ToUpper(k), c.settings.Variables.Get(k)))
-	}
-
-	return out
 }

environment/docker.go

@@ -3,6 +3,8 @@ package environment
 import (
 	"context"
 	"github.com/apex/log"
+	"strconv"
+	"sync"
 
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/network"
@@ -10,10 +12,28 @@ import (
 	"github.com/pterodactyl/wings/config"
 )
 
+var _cmu sync.Mutex
+var _client *client.Client
+
+// Return a Docker client to be used throughout the codebase. Once a client has been created it
+// will be returned for all subsequent calls to this function.
+func DockerClient() (*client.Client, error) {
+	_cmu.Lock()
+	defer _cmu.Unlock()
+
+	if _client != nil {
+		return _client, nil
+	}
+
+	_client, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
+
+	return _client, err
+}
+
 // Configures the required network for the docker environment.
 func ConfigureDocker(c *config.DockerConfiguration) error {
 	// Ensure the required docker network exists on the system.
-	cli, err := client.NewClientWithOpts(client.FromEnv)
+	cli, err := DockerClient()
 	if err != nil {
 		return err
 	}
@@ -64,7 +84,7 @@ func createDockerNetwork(cli *client.Client, c *config.DockerConfiguration) erro
 		Options: map[string]string{
 			"encryption": "false",
 			"com.docker.network.bridge.default_bridge":       "false",
-			"com.docker.network.bridge.enable_icc":           "true",
+			"com.docker.network.bridge.enable_icc":           strconv.FormatBool(c.Network.EnableICC),
 			"com.docker.network.bridge.enable_ip_masquerade": "true",
 			"com.docker.network.bridge.host_binding_ipv4":    "0.0.0.0",
 			"com.docker.network.bridge.name":                 "pterodactyl0",

environment/docker/console.go

@@ -17,4 +17,4 @@ func (c Console) Write(b []byte) (int, error) {
 	}
 
 	return len(b), nil
-}
+}

environment/docker/container.go

@@ -2,7 +2,10 @@ package docker
 
 import (
 	"bufio"
+	"bytes"
 	"context"
+	"emperror.dev/errors"
+	"encoding/json"
 	"fmt"
 	"github.com/apex/log"
 	"github.com/docker/docker/api/types"
@@ -10,7 +13,6 @@ import (
 	"github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/client"
 	"github.com/docker/docker/daemon/logger/jsonfilelog"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"io"
@@ -19,6 +21,11 @@ import (
 	"time"
 )
 
+type imagePullStatus struct {
+	Status   string `json:"status"`
+	Progress string `json:"progress"`
+}
+
 // Attaches to the docker container itself and ensures that we can pipe data in and out
 // of the process stream. This should not be used for reading console data as you *will*
 // miss important output at the beginning because of the time delay with attaching to the
@@ -29,7 +36,7 @@ func (e *Environment) Attach() error {
 	}
 
 	if err := e.followOutput(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	opts := types.ContainerAttachOptions{
@@ -41,7 +48,7 @@ func (e *Environment) Attach() error {
 
 	// Set the stream again with the container.
 	if st, err := e.client.ContainerAttach(context.Background(), e.Id, opts); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	} else {
 		e.SetStream(&st)
 	}
@@ -53,19 +60,25 @@ func (e *Environment) Attach() error {
 		defer cancel()
 		defer e.stream.Close()
 		defer func() {
-			e.setState(environment.ProcessOfflineState)
+			e.SetState(environment.ProcessOfflineState)
 			e.SetStream(nil)
 		}()
 
-		// Poll resources in a seperate thread since this will block the copy call below
+		// Poll resources in a separate thread since this will block the copy call below
-		// from being reached until it is completed if not run in a seperate process. However,
+		// from being reached until it is completed if not run in a separate process. However,
 		// we still want it to be stopped when the copy operation below is finished running which
 		// indicates that the container is no longer running.
-		go e.pollResources(ctx)
+		go func(ctx context.Context) {
+			if err := e.pollResources(ctx); err != nil {
+				log.WithField("environment_id", e.Id).WithField("error", errors.WithStackIf(err)).Error("error during environment resource polling")
+			}
+		}(ctx)
 
 		// Stream the reader output to the console which will then fire off events and handle console
 		// throttling and sending the output to the user.
-		_, _ = io.Copy(console, e.stream.Reader)
+		if _, err := io.Copy(console, e.stream.Reader); err != nil {
+			log.WithField("environment_id", e.Id).WithField("error", errors.WithStackIf(err)).Error("error while copying environment output to console")
+		}
 	}(c)
 
 	return nil
@@ -102,7 +115,7 @@ func (e *Environment) InSituUpdate() error {
 			return nil
 		}
 
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	u := container.UpdateConfig{
@@ -112,7 +125,7 @@ func (e *Environment) InSituUpdate() error {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
 	defer cancel()
 	if _, err := e.client.ContainerUpdate(ctx, e.Id, u); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -127,16 +140,25 @@ func (e *Environment) Create() error {
 	if _, err := e.client.ContainerInspect(context.Background(), e.Id); err == nil {
 		return nil
 	} else if !client.IsErrNotFound(err) {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Try to pull the requested image before creating the container.
 	if err := e.ensureImageExists(e.meta.Image); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	a := e.Configuration.Allocations()
 
+	evs := e.Configuration.EnvironmentVariables()
+	for i, v := range evs {
+		// Convert 127.0.0.1 to the pterodactyl0 network interface if the environment is Docker
+		// so that the server operates as expected.
+		if v == "SERVER_IP=127.0.0.1" {
+			evs[i] = "SERVER_IP=" + config.Get().Docker.Network.Interface
+		}
+	}
+
 	conf := &container.Config{
 		Hostname:     e.Id,
 		Domainname:   config.Get().Docker.Domainname,
@@ -148,7 +170,7 @@ func (e *Environment) Create() error {
 		Tty:          true,
 		ExposedPorts: a.Exposed(),
 		Image:        e.meta.Image,
-		Env:          e.variables(),
+		Env:          e.Configuration.EnvironmentVariables(),
 		Labels: map[string]string{
 			"Service":       "Pterodactyl",
 			"ContainerType": "server_process",
@@ -158,16 +180,16 @@ func (e *Environment) Create() error {
 	tmpfsSize := strconv.Itoa(int(config.Get().Docker.TmpfsSize))
 
 	hostConf := &container.HostConfig{
-		PortBindings: a.Bindings(),
+		PortBindings: a.DockerBindings(),
 
 		// Configure the mounts for this container. First mount the server data directory
-		// into the container as a r/w bine.
+		// into the container as a r/w bind.
 		Mounts: e.convertMounts(),
 
 		// Configure the /tmp folder mapping in containers. This is necessary for some
 		// games that need to make use of it for downloads and other installation processes.
 		Tmpfs: map[string]string{
-			"/tmp": "rw,exec,nosuid,size="+tmpfsSize+"M",
+			"/tmp": "rw,exec,nosuid,size=" + tmpfsSize + "M",
 		},
 
 		// Define resource limits for the container based on the data passed through
@@ -198,18 +220,12 @@ func (e *Environment) Create() error {
 	}
 
 	if _, err := e.client.ContainerCreate(context.Background(), conf, hostConf, nil, e.Id); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
 }
 
-func (e *Environment) variables() []string {
-	v := e.Configuration.EnvironmentVariables()
-
-	return append(v, fmt.Sprintf("STARTUP=%s", e.meta.Invocation))
-}
-
 func (e *Environment) convertMounts() []mount.Mount {
 	var out []mount.Mount
 
@@ -228,8 +244,8 @@ func (e *Environment) convertMounts() []mount.Mount {
 // Remove the Docker container from the machine. If the container is currently running
 // it will be forcibly stopped by Docker.
 func (e *Environment) Destroy() error {
-	// We set it to stopping than offline to prevent crash detection from being triggeree.
+	// We set it to stopping than offline to prevent crash detection from being triggered.
-	e.setState(environment.ProcessStoppingState)
+	e.SetState(environment.ProcessStoppingState)
 
 	err := e.client.ContainerRemove(context.Background(), e.Id, types.ContainerRemoveOptions{
 		RemoveVolumes: true,
@@ -245,18 +261,18 @@ func (e *Environment) Destroy() error {
 		return nil
 	}
 
-	e.setState(environment.ProcessOfflineState)
+	e.SetState(environment.ProcessOfflineState)
 
 	return err
 }
 
-// Attaches to the log for the container. This avoids us missing cruicial output that
+// Attaches to the log for the container. This avoids us missing crucial output that
 // happens in the split seconds before the code moves from 'Starting' to 'Attaching'
 // on the process.
 func (e *Environment) followOutput() error {
 	if exists, err := e.Exists(); !exists {
 		if err != nil {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 
 		return errors.New(fmt.Sprintf("no such container: %s", e.Id))
@@ -271,20 +287,58 @@ func (e *Environment) followOutput() error {
 
 	reader, err := e.client.ContainerLogs(context.Background(), e.Id, opts)
 
-	go func(r io.ReadCloser) {
+	go func(reader io.ReadCloser) {
-		defer r.Close()
+		defer reader.Close()
 
-		s := bufio.NewScanner(r)
+		r := bufio.NewReader(reader)
-		for s.Scan() {
+	ParentLoop:
-			e.Events().Publish(environment.ConsoleOutputEvent, s.Text())
+		for {
+			var b bytes.Buffer
+			var line []byte
+			var isPrefix bool
+
+			for {
+				// Read the line and write it to the buffer.
+				line, isPrefix, err = r.ReadLine()
+
+				// Certain games like Minecraft output absolutely random carriage returns in the output seemingly
+				// in line with that it thinks is the terminal size. Those returns break a lot of output handling,
+				// so we'll just replace them with proper new-lines and then split it later and send each line as
+				// its own event in the response.
+				b.Write(bytes.ReplaceAll(line, []byte(" \r"), []byte("\r\n")))
+
+				// Finish this loop and begin outputting the line if there is no prefix (the line fit into
+				// the default buffer), or if we hit the end of the line.
+				if !isPrefix || err == io.EOF {
+					break
+				}
+
+				// If we encountered an error with something in ReadLine that was not an EOF just abort
+				// the entire process here.
+				if err != nil {
+					break ParentLoop
+				}
+			}
+
+			// Publish the line for this loop. Break on new-line characters so every line is sent as a single
+			// output event, otherwise you get funky handling in the browser console.
+			for _, line := range strings.Split(b.String(), "\r\n") {
+				e.Events().Publish(environment.ConsoleOutputEvent, line)
+			}
+
+			// If the error we got previously that lead to the line being output is an io.EOF we want to
+			// exit the entire looping process.
+			if err == io.EOF {
+				break
+			}
 		}
 
-		if err := s.Err(); err != nil {
+		if err != nil && err != io.EOF {
 			log.WithField("error", err).WithField("container_id", e.Id).Warn("error processing scanner line in console output")
 		}
 	}(reader)
 
-	return errors.WithStack(err)
+	return errors.WithStackIf(err)
 }
 
 // Pulls the image from Docker. If there is an error while pulling the image from the source
@@ -295,9 +349,15 @@ func (e *Environment) followOutput() error {
 // need to block all of the servers from booting just because of that. I'd imagine in a lot of
 // cases an outage shouldn't affect users too badly. It'll at least keep existing servers working
 // correctly if anything.
-//
-// TODO: handle authorization & local images
 func (e *Environment) ensureImageExists(image string) error {
+	e.Events().Publish(environment.DockerImagePullStarted, "")
+	defer e.Events().Publish(environment.DockerImagePullCompleted, "")
+
+	// Images prefixed with a ~ are local images that we do not need to try and pull.
+	if strings.HasPrefix(image, "~") {
+		return nil
+	}
+
 	// Give it up to 15 minutes to pull the image. I think this should cover 99.8% of cases where an
 	// image pull might fail. I can't imagine it will ever take more than 15 minutes to fully pull
 	// an image. Let me know when I am inevitably wrong here...
@@ -346,7 +406,7 @@ func (e *Environment) ensureImageExists(image string) error {
 				log.WithFields(log.Fields{
 					"image":        image,
 					"container_id": e.Id,
-					"error":        errors.New(err.Error()),
+					"err":          err.Error(),
 				}).Warn("unable to pull requested image from remote source, however the image exists locally")
 
 				// Okay, we found a matching container image, in that case just go ahead and return
@@ -362,15 +422,21 @@ func (e *Environment) ensureImageExists(image string) error {
 	log.WithField("image", image).Debug("pulling docker image... this could take a bit of time")
 
 	// I'm not sure what the best approach here is, but this will block execution until the image
-	// is done being pulled, which is what we neee.
+	// is done being pulled, which is what we need.
 	scanner := bufio.NewScanner(out)
 	for scanner.Scan() {
-		continue
+		s := imagePullStatus{}
+		fmt.Println(scanner.Text())
+		if err := json.Unmarshal(scanner.Bytes(), &s); err == nil {
+			e.Events().Publish(environment.DockerImagePullStatus, s.Status+" "+s.Progress)
+		}
 	}
 
 	if err := scanner.Err(); err != nil {
 		return err
 	}
 
+	log.WithField("image", image).Debug("completed docker image pull")
+
 	return nil
 }

environment/docker/environment.go

@@ -2,20 +2,20 @@ package docker
 
 import (
 	"context"
+	"emperror.dev/errors"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/client"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/events"
+	"github.com/pterodactyl/wings/system"
 	"io"
 	"sync"
 )
 
 type Metadata struct {
-	Invocation string
+	Image string
-	Image      string
+	Stop  api.ProcessStopConfiguration
-	Stop       *api.ProcessStopConfiguration
 }
 
 // Ensure that the Docker environment is always implementing all of the methods
@@ -48,15 +48,14 @@ type Environment struct {
 	emitter *events.EventBus
 
 	// Tracks the environment state.
-	st   string
+	st *system.AtomicString
-	stMu sync.RWMutex
 }
 
 // Creates a new base Docker environment. The ID passed through will be the ID that is used to
 // reference the container from here on out. This should be unique per-server (we use the UUID
 // by default). The container does not need to exist at this point.
 func New(id string, m *Metadata, c *environment.Configuration) (*Environment, error) {
-	cli, err := client.NewClientWithOpts(client.FromEnv)
+	cli, err := environment.DockerClient()
 	if err != nil {
 		return nil, err
 	}
@@ -66,17 +65,12 @@ func New(id string, m *Metadata, c *environment.Configuration) (*Environment, er
 		Configuration: c,
 		meta:          m,
 		client:        cli,
+		st:            system.NewAtomicString(environment.ProcessOfflineState),
 	}
 
 	return e, nil
 }
 
-func (e *Environment) SetStopConfiguration(c *api.ProcessStopConfiguration) {
-	e.mu.Lock()
-	e.meta.Stop = c
-	e.mu.Unlock()
-}
-
 func (e *Environment) Type() string {
 	return "docker"
 }
@@ -110,7 +104,7 @@ func (e *Environment) Events() *events.EventBus {
 // Determines if the container exists in this environment. The ID passed through should be the
 // server UUID since containers are created utilizing the server UUID as the name and docker
 // will work fine when using the container name as the lookup parameter in addition to the longer
-// ID auto-assigned when the container is createe.
+// ID auto-assigned when the container is created.
 func (e *Environment) Exists() (bool, error) {
 	_, err := e.client.ContainerInspect(context.Background(), e.Id)
 
@@ -144,7 +138,7 @@ func (e *Environment) IsRunning() (bool, error) {
 	return c.State.Running, nil
 }
 
-// Determine the container exit state and return the exit code and wether or not
+// Determine the container exit state and return the exit code and whether or not
 // the container was killed by the OOM killer.
 func (e *Environment) ExitState() (uint32, bool, error) {
 	c, err := e.client.ContainerInspect(context.Background(), e.Id)
@@ -155,15 +149,37 @@ func (e *Environment) ExitState() (uint32, bool, error) {
 		//
 		// However, someone reported an error in Discord about this scenario happening,
 		// so I guess this should prevent it? They didn't tell me how they caused it though
-		// so that's a mystery that will have to go unsolvee.
+		// so that's a mystery that will have to go unsolved.
 		//
 		// @see https://github.com/pterodactyl/panel/issues/2003
 		if client.IsErrNotFound(err) {
 			return 1, false, nil
 		}
 
-		return 0, false, errors.WithStack(err)
+		return 0, false, errors.WithStackIf(err)
 	}
 
 	return uint32(c.State.ExitCode), c.State.OOMKilled, nil
 }
+
+// Returns the environment configuration allowing a process to make modifications of the
+// environment on the fly.
+func (e *Environment) Config() *environment.Configuration {
+	e.mu.RLock()
+	defer e.mu.RUnlock()
+
+	return e.Configuration
+}
+
+// Sets the stop configuration for the environment.
+func (e *Environment) SetStopConfiguration(c api.ProcessStopConfiguration) {
+	e.mu.Lock()
+	e.meta.Stop = c
+	e.mu.Unlock()
+}
+
+func (e *Environment) SetImage(i string) {
+	e.mu.Lock()
+	e.meta.Image = i
+	e.mu.Unlock()
+}

environment/docker/power.go

@@ -2,11 +2,11 @@ package docker
 
 import (
 	"context"
+	"emperror.dev/errors"
 	"github.com/apex/log"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/client"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/environment"
 	"os"
@@ -26,7 +26,7 @@ func (e *Environment) OnBeforeStart() error {
 	// the Panel is usee.
 	if err := e.client.ContainerRemove(context.Background(), e.Id, types.ContainerRemoveOptions{RemoveVolumes: true}); err != nil {
 		if !client.IsErrNotFound(err) {
-			return err
+			return errors.WrapIf(err, "failed to remove server docker container during pre-boot")
 		}
 	}
 
@@ -35,7 +35,7 @@ func (e *Environment) OnBeforeStart() error {
 	// container and data storage directory.
 	//
 	// This won't actually run an installation process however, it is just here to ensure the
-	// environment gets created properly if it is missing and the server is startee. We're making
+	// environment gets created properly if it is missing and the server is started. We're making
 	// an assumption that all of the files will still exist at this point.
 	if err := e.Create(); err != nil {
 		return err
@@ -57,24 +57,24 @@ func (e *Environment) Start() error {
 			// If we don't set it to stopping first, you'll trigger crash detection which
 			// we don't want to do at this point since it'll just immediately try to do the
 			// exact same action that lead to it crashing in the first place...
-			e.setState(environment.ProcessStoppingState)
+			e.SetState(environment.ProcessStoppingState)
-			e.setState(environment.ProcessOfflineState)
+			e.SetState(environment.ProcessOfflineState)
 		}
 	}()
 
 	if c, err := e.client.ContainerInspect(context.Background(), e.Id); err != nil {
 		// Do nothing if the container is not found, we just don't want to continue
-		// to the next block of code here. This check was inlined here to guard againt
+		// to the next block of code here. This check was inlined here to guard against
 		// a nil-pointer when checking c.State below.
 		//
 		// @see https://github.com/pterodactyl/panel/issues/2000
 		if !client.IsErrNotFound(err) {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 	} else {
 		// If the server is running update our internal state and continue on with the attach.
 		if c.State.Running {
-			e.setState(environment.ProcessRunningState)
+			e.SetState(environment.ProcessRunningState)
 
 			return e.Attach()
 		}
@@ -84,12 +84,12 @@ func (e *Environment) Start() error {
 		// to truncate them.
 		if _, err := os.Stat(c.LogPath); err == nil {
 			if err := os.Truncate(c.LogPath, 0); err != nil {
-				return errors.WithStack(err)
+				return errors.WithStackIf(err)
 			}
 		}
 	}
 
-	e.setState(environment.ProcessStartingState)
+	e.SetState(environment.ProcessStartingState)
 
 	// Set this to true for now, we will set it to false once we reach the
 	// end of this chain.
@@ -99,14 +99,14 @@ func (e *Environment) Start() error {
 	// exists on the system, and rebuild the container if that is required for server booting to
 	// occur.
 	if err := e.OnBeforeStart(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
 	defer cancel()
 
 	if err := e.client.ContainerStart(ctx, e.Id, types.ContainerStartOptions{}); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// No errors, good to continue through.
@@ -126,9 +126,9 @@ func (e *Environment) Stop() error {
 	s := e.meta.Stop
 	e.mu.RUnlock()
 
-	if s == nil || s.Type == api.ProcessStopSignal {
+	if s.Type == "" || s.Type == api.ProcessStopSignal {
-		if s == nil {
+		if s.Type == "" {
-			log.WithField("container_id", e.Id).Warn("no stop configuration detected for environment, using termination proceedure")
+			log.WithField("container_id", e.Id).Warn("no stop configuration detected for environment, using termination procedure")
 		}
 
 		return e.Terminate(os.Kill)
@@ -136,8 +136,8 @@ func (e *Environment) Stop() error {
 
 	// If the process is already offline don't switch it back to stopping. Just leave it how
 	// it is and continue through to the stop handling for the process.
-	if e.State() != environment.ProcessOfflineState {
+	if e.st.Load() != environment.ProcessOfflineState {
-		e.setState(environment.ProcessStoppingState)
+		e.SetState(environment.ProcessStoppingState)
 	}
 
 	// Only attempt to send the stop command to the instance if we are actually attached to
@@ -153,7 +153,7 @@ func (e *Environment) Stop() error {
 		// an error.
 		if client.IsErrNotFound(err) {
 			e.SetStream(nil)
-			e.setState(environment.ProcessOfflineState)
+			e.SetState(environment.ProcessOfflineState)
 
 			return nil
 		}
@@ -169,7 +169,7 @@ func (e *Environment) Stop() error {
 // will be terminated forcefully depending on the value of the second argument.
 func (e *Environment) WaitForStop(seconds uint, terminate bool) error {
 	if err := e.Stop(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(seconds)*time.Second)
@@ -183,14 +183,22 @@ func (e *Environment) WaitForStop(seconds uint, terminate bool) error {
 	case <-ctx.Done():
 		if ctxErr := ctx.Err(); ctxErr != nil {
 			if terminate {
-				return e.Terminate(os.Kill)
+				log.WithField("container_id", e.Id).Debug("server did not stop in time, executing process termination")
+
+				return errors.WithStackIf(e.Terminate(os.Kill))
 			}
 
-			return errors.WithStack(ctxErr)
+			return errors.WithStackIf(ctxErr)
 		}
 	case err := <-errChan:
 		if err != nil {
-			return errors.WithStack(err)
+			if terminate {
+				log.WithField("container_id", e.Id).WithField("error", errors.WithStackIf(err)).Warn("error while waiting for container stop, attempting process termination")
+
+				return errors.WithStackIf(e.Terminate(os.Kill))
+			}
+
+			return errors.WithStackIf(err)
 		}
 	case <-ok:
 	}
@@ -202,23 +210,23 @@ func (e *Environment) WaitForStop(seconds uint, terminate bool) error {
 func (e *Environment) Terminate(signal os.Signal) error {
 	c, err := e.client.ContainerInspect(context.Background(), e.Id)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	if !c.State.Running {
 		// If the container is not running but we're not already in a stopped state go ahead
 		// and update things to indicate we should be completely stopped now. Set to stopping
 		// first so crash detection is not triggered.
-		if e.State() != environment.ProcessOfflineState {
+		if e.st.Load() != environment.ProcessOfflineState {
-			e.setState(environment.ProcessStoppingState)
+			e.SetState(environment.ProcessStoppingState)
-			e.setState(environment.ProcessOfflineState)
+			e.SetState(environment.ProcessOfflineState)
 		}
 
 		return nil
 	}
 
-	// We set it to stopping than offline to prevent crash detection from being triggeree.
+	// We set it to stopping than offline to prevent crash detection from being triggered.
-	e.setState(environment.ProcessStoppingState)
+	e.SetState(environment.ProcessStoppingState)
 
 	sig := strings.TrimSuffix(strings.TrimPrefix(signal.String(), "signal "), "ed")
 
@@ -226,7 +234,7 @@ func (e *Environment) Terminate(signal os.Signal) error {
 		return err
 	}
 
-	e.setState(environment.ProcessOfflineState)
+	e.SetState(environment.ProcessOfflineState)
 
 	return nil
 }

environment/docker/state.go

@@ -1,41 +1,29 @@
 package docker
 
 import (
+	"emperror.dev/errors"
 	"fmt"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/environment"
 )
 
-// Returns the current environment state.
 func (e *Environment) State() string {
-	e.stMu.RLock()
+	return e.st.Load()
-	defer e.stMu.RUnlock()
-
-	return e.st
 }
 
 // Sets the state of the environment. This emits an event that server's can hook into to
 // take their own actions and track their own state based on the environment.
-func (e *Environment) setState(state string) error {
+func (e *Environment) SetState(state string) {
 	if state != environment.ProcessOfflineState &&
 		state != environment.ProcessStartingState &&
 		state != environment.ProcessRunningState &&
 		state != environment.ProcessStoppingState {
-		return errors.New(fmt.Sprintf("invalid server state received: %s", state))
+		panic(errors.New(fmt.Sprintf("invalid server state received: %s", state)))
 	}
 
-	// Get the current state of the environment before changing it.
+	// Emit the event to any listeners that are currently registered.
-	prevState := e.State()
+	if e.State() != state {
-
-	// Emit the event to any listeners that are currently registeree.
-	if prevState != state {
 		// If the state changed make sure we update the internal tracking to note that.
-		e.stMu.Lock()
+		e.st.Store(state)
-		e.st = state
+		e.Events().Publish(environment.StateChangeEvent, state)
-		e.stMu.Unlock()
-
-		e.Events().Publish(environment.StateChangeEvent, e.State())
 	}
-
-	return nil
 }

environment/docker/stats.go

@@ -2,10 +2,10 @@ package docker
 
 import (
 	"context"
+	"emperror.dev/errors"
 	"encoding/json"
 	"github.com/apex/log"
 	"github.com/docker/docker/api/types"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/environment"
 	"io"
 	"math"
@@ -15,14 +15,20 @@ import (
 // Attach to the instance and then automatically emit an event whenever the resource usage for the
 // server process changes.
 func (e *Environment) pollResources(ctx context.Context) error {
-	if e.State() == environment.ProcessOfflineState {
+	l := log.WithField("container_id", e.Id)
-		return errors.New("attempting to enable resource polling on a stopped server instance")
+
+	l.Debug("starting resource polling for container")
+	defer l.Debug("stopped resource polling for container")
+
+	if e.st.Load() == environment.ProcessOfflineState {
+		return errors.New("cannot enable resource polling on a stopped server")
 	}
 
 	stats, err := e.client.ContainerStats(context.Background(), e.Id, true)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
+	defer stats.Body.Close()
 
 	dec := json.NewDecoder(stats.Body)
 
@@ -35,14 +41,17 @@ func (e *Environment) pollResources(ctx context.Context) error {
 
 			if err := dec.Decode(&v); err != nil {
 				if err != io.EOF {
-					log.WithField("container_id", e.Id).Warn("encountered error processing docker stats output, stopping collection")
+					l.WithField("error", errors.WithStackIf(err)).Warn("error while processing Docker stats output for container")
+				} else {
+					l.Debug("io.EOF encountered during stats decode, stopping polling...")
 				}
 
 				return nil
 			}
 
 			// Disable collection if the server is in an offline state and this process is still running.
-			if e.State() == environment.ProcessOfflineState {
+			if e.st.Load() == environment.ProcessOfflineState {
+				l.Debug("process in offline state while resource polling is still active; stopping poll")
 				return nil
 			}
 
@@ -66,8 +75,11 @@ func (e *Environment) pollResources(ctx context.Context) error {
 				},
 			}
 
-			b, _ := json.Marshal(st)
+			if b, err := json.Marshal(st); err != nil {
-			e.Events().Publish(environment.ResourceEvent, string(b))
+				l.WithField("error", errors.WithStackIf(err)).Warn("error while marshaling stats object for environment")
+			} else {
+				e.Events().Publish(environment.ResourceEvent, string(b))
+			}
 		}
 	}
 }

environment/docker/stream.go

@@ -4,17 +4,19 @@ import (
 	"bufio"
 	"bytes"
 	"context"
+	"emperror.dev/errors"
 	"encoding/json"
 	"github.com/docker/docker/api/types"
-	"github.com/pkg/errors"
+	"github.com/pterodactyl/wings/environment"
-	"io"
+	"strconv"
-	"os"
 )
 
 type dockerLogLine struct {
 	Log string `json:"log"`
 }
 
+var ErrNotAttached = errors.Sentinel("not attached to instance")
+
 func (e *Environment) setStream(s *types.HijackedResponse) {
 	e.mu.Lock()
 	e.stream = s
@@ -24,58 +26,46 @@ func (e *Environment) setStream(s *types.HijackedResponse) {
 // Sends the specified command to the stdin of the running container instance. There is no
 // confirmation that this data is sent successfully, only that it gets pushed into the stdin.
 func (e *Environment) SendCommand(c string) error {
+	if !e.IsAttached() {
+		return ErrNotAttached
+	}
+
 	e.mu.RLock()
 	defer e.mu.RUnlock()
 
-	if !e.IsAttached() {
+	// If the command being processed is the same as the process stop command then we want to mark
-		return errors.New("attempting to send command to non-attached instance")
+	// the server as entering the stopping state otherwise the process will stop and Wings will think
+	// it has crashed and attempt to restart it.
+	if e.meta.Stop.Type == "command" && c == e.meta.Stop.Value {
+		e.SetState(environment.ProcessStoppingState)
 	}
 
 	_, err := e.stream.Conn.Write([]byte(c + "\n"))
 
-	return errors.WithStack(err)
+	return errors.WithStackIf(err)
 }
 
 // Reads the log file for the server. This does not care if the server is running or not, it will
 // simply try to read the last X bytes of the file and return them.
-func (e *Environment) Readlog(len int64) ([]string, error) {
+func (e *Environment) Readlog(lines int) ([]string, error) {
-	j, err := e.client.ContainerInspect(context.Background(), e.Id)
+	r, err := e.client.ContainerLogs(context.Background(), e.Id, types.ContainerLogsOptions{
+		ShowStdout: true,
+		ShowStderr: true,
+		Tail:       strconv.Itoa(lines),
+	})
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
+	}
+	defer r.Close()
+
+	var out []string
+
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		out = append(out, scanner.Text())
 	}
 
-	if j.LogPath == "" {
+	return out, nil
-		return nil, errors.New("empty log path defined for server")
-	}
-
-	f, err := os.Open(j.LogPath)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	// Check if the length of the file is smaller than the amount of data that was requested
-	// for reading. If so, adjust the length to be the total length of the file. If this is not
-	// done an error is thrown since we're reading backwards, and not forwards.
-	if stat, err := os.Stat(j.LogPath); err != nil {
-		return nil, err
-	} else if stat.Size() < len {
-		len = stat.Size()
-	}
-
-	// Seed to the end of the file and then move backwards until the length is met to avoid
-	// reading the entirety of the file into memory.
-	if _, err := f.Seek(-len, io.SeekEnd); err != nil {
-		return nil, err
-	}
-
-	b := make([]byte, len)
-
-	if _, err := f.Read(b); err != nil && err != io.EOF {
-		return nil, err
-	}
-
-	return e.parseLogToStrings(b)
 }
 
 // Docker stores the logs for server output in a JSON format. This function will iterate over the JSON
@@ -87,6 +77,7 @@ func (e *Environment) parseLogToStrings(b []byte) ([]string, error) {
 	scanner := bufio.NewScanner(bytes.NewReader(b))
 	for scanner.Scan() {
 		var l dockerLogLine
+
 		// Unmarshal the contents and allow up to a single error before bailing out of the process. We
 		// do this because if you're arbitrarily reading a length of the file you'll likely end up
 		// with the first line in the output being improperly formatted JSON. In those cases we want to

environment/environment.go

@@ -6,9 +6,12 @@ import (
 )
 
 const (
-	ConsoleOutputEvent = "console output"
+	ConsoleOutputEvent       = "console output"
-	StateChangeEvent   = "state change"
+	StateChangeEvent         = "state change"
-	ResourceEvent      = "resources"
+	ResourceEvent            = "resources"
+	DockerImagePullStarted   = "docker image pull started"
+	DockerImagePullStatus    = "docker image pull status"
+	DockerImagePullCompleted = "docker image pull completed"
 )
 
 const (
@@ -24,6 +27,9 @@ type ProcessEnvironment interface {
 	// Returns the name of the environment.
 	Type() string
 
+	// Returns the environment configuration to the caller.
+	Config() *Configuration
+
 	// Returns an event emitter instance that can be hooked into to listen for different
 	// events that are fired by the environment. This should not allow someone to publish
 	// events, only subscribe to them.
@@ -86,6 +92,14 @@ type ProcessEnvironment interface {
 	SendCommand(string) error
 
 	// Reads the log file for the process from the end backwards until the provided
-	// number of bytes is met.
+	// number of lines is met.
-	Readlog(int64) ([]string, error)
+	Readlog(int) ([]string, error)
+
+	// Returns the current state of the environment.
+	State() string
+
+	// Sets the current state of the environment. In general you should let the environment
+	// handle this itself, but there are some scenarios where it is helpful for the server
+	// to update the state externally (e.g. starting -> started).
+	SetState(string)
 }

environment/settings.go

@@ -2,6 +2,7 @@ package environment
 
 import (
 	"fmt"
+	"github.com/apex/log"
 	"math"
 	"strconv"
 )
@@ -21,7 +22,7 @@ type Mount struct {
 	// that we're mounting into the container at the Target location.
 	Source string `json:"source"`
 
-	// Wether or not the directory is being mounted as read-only. It is up to the environment to
+	// Whether or not the directory is being mounted as read-only. It is up to the environment to
 	// handle this value correctly and ensure security expectations are met with its usage.
 	ReadOnly bool `json:"read_only"`
 }
@@ -118,7 +119,13 @@ func (v Variables) Get(key string) string {
 		return fmt.Sprintf("%f", val.(float64))
 	case bool:
 		return strconv.FormatBool(val.(bool))
+	case string:
+		return val.(string)
 	}
 
-	return val.(string)
+	// TODO: I think we can add a check for val == nil and return an empty string for those
+	//  and this warning should theoretically never happen?
+	log.Warn(fmt.Sprintf("failed to marshal environment variable \"%s\" of type %+v into string", key, val))
+
+	return ""
 }

events/events.go

@@ -1,7 +1,9 @@
 package events
 
 import (
+	"emperror.dev/errors"
 	"encoding/json"
+	"github.com/gammazero/workerpool"
 	"strings"
 	"sync"
 )
@@ -12,14 +14,13 @@ type Event struct {
 }
 
 type EventBus struct {
-	sync.RWMutex
+	mu    sync.RWMutex
-
+	pools map[string]*CallbackPool
-	subscribers map[string]map[chan Event]struct{}
 }
 
 func New() *EventBus {
 	return &EventBus{
-		subscribers: make(map[string]map[chan Event]struct{}),
+		pools: make(map[string]*CallbackPool),
 	}
 }
 
@@ -39,25 +40,36 @@ func (e *EventBus) Publish(topic string, data string) {
 		}
 	}
 
+	e.mu.RLock()
+	defer e.mu.RUnlock()
+
 	// Acquire a read lock and loop over all of the channels registered for the topic. This
 	// avoids a panic crash if the process tries to unregister the channel while this routine
 	// is running.
-	go func() {
+	if cp, ok := e.pools[t]; ok {
-		e.RLock()
+		for _, callback := range cp.callbacks {
-		defer e.RUnlock()
+			c := *callback
-
+			evt := Event{Data: data, Topic: topic}
-		if ch, ok := e.subscribers[t]; ok {
+			// Using the workerpool with one worker allows us to execute events in a FIFO manner. Running
-			for channel := range ch {
+			// this using goroutines would cause things such as console output to just output in random order
-				channel <- Event{Data: data, Topic: topic}
+			// if more than one event is fired at the same time.
-			}
+			//
+			// However, the pool submission does not block the execution of this function itself, allowing
+			// us to call publish without blocking any of the other pathways.
+			//
+			// @see https://github.com/pterodactyl/panel/issues/2303
+			cp.pool.Submit(func() {
+				c(evt)
+			})
 		}
-	}()
+	}
 }
 
+// Publishes a JSON message to a given topic.
 func (e *EventBus) PublishJson(topic string, data interface{}) error {
 	b, err := json.Marshal(data)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	e.Publish(topic, string(b))
@@ -65,41 +77,46 @@ func (e *EventBus) PublishJson(topic string, data interface{}) error {
 	return nil
 }
 
-// Subscribe to an emitter topic using a channel.
+// Register a callback function that will be executed each time one of the events using the topic
-func (e *EventBus) Subscribe(topic string, ch chan Event) {
+// name is called.
-	e.Lock()
+func (e *EventBus) On(topic string, callback *func(Event)) {
-	defer e.Unlock()
+	e.mu.Lock()
+	defer e.mu.Unlock()
 
-	if _, exists := e.subscribers[topic]; !exists {
+	// Check if this topic has been registered at least once for the event listener, and if
-		e.subscribers[topic] = make(map[chan Event]struct{})
+	// not create an empty struct for the topic.
+	if _, exists := e.pools[topic]; !exists {
+		e.pools[topic] = &CallbackPool{
+			callbacks: make([]*func(Event), 0),
+			pool:      workerpool.New(1),
+		}
 	}
 
-	// Only set the channel if there is not currently a matching one for this topic. This
+	// If this callback is not already registered as an event listener, go ahead and append
-	// avoids registering two identical listeners for the same topic and causing pain in
+	// it to the array of callbacks for this topic.
-	// the unsubscribe functionality as well.
+	e.pools[topic].Add(callback)
-	if _, exists := e.subscribers[topic][ch]; !exists {
+}
-		e.subscribers[topic][ch] = struct{}{}
+
+// Removes an event listener from the bus.
+func (e *EventBus) Off(topic string, callback *func(Event)) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if cp, ok := e.pools[topic]; ok {
+		cp.Remove(callback)
 	}
 }
 
-// Unsubscribe a channel from a given topic.
+// Removes all of the event listeners that have been registered for any topic. Also stops the worker
-func (e *EventBus) Unsubscribe(topic string, ch chan Event) {
+// pool to close that routine.
-	e.Lock()
+func (e *EventBus) Destroy() {
-	defer e.Unlock()
+	e.mu.Lock()
+	defer e.mu.Unlock()
 
-	if _, exists := e.subscribers[topic][ch]; exists {
+	// Stop every pool that exists for a given callback topic.
-		delete(e.subscribers[topic], ch)
+	for _, cp := range e.pools {
+		cp.pool.Stop()
 	}
-}
 
-// Removes all of the event listeners for the server. This is used when a server
+	e.pools = make(map[string]*CallbackPool)
-// is being deleted to avoid a bunch of de-reference errors cropping up. Obviously
-// should also check elsewhere and handle a server reference going nil, but this
-// won't hurt.
-func (e *EventBus) UnsubscribeAll() {
-	e.Lock()
-	defer e.Unlock()
-
-	// Reset the entire struct into an empty map.
-	e.subscribers = make(map[string]map[chan Event]struct{})
 }

events/pool.go

@@ -0,0 +1,49 @@
+package events
+
+import (
+	"github.com/gammazero/workerpool"
+	"reflect"
+)
+
+type CallbackPool struct {
+	callbacks []*func(Event)
+	pool      *workerpool.WorkerPool
+}
+
+// Pushes a new callback into the array of listeners for the pool.
+func (cp *CallbackPool) Add(callback *func(Event)) {
+	if cp.index(reflect.ValueOf(callback)) < 0 {
+		cp.callbacks = append(cp.callbacks, callback)
+	}
+}
+
+// Removes a callback from the array of registered callbacks if it exists.
+func (cp *CallbackPool) Remove(callback *func(Event)) {
+	i := cp.index(reflect.ValueOf(callback))
+
+	// If i < 0 it means there was no index found for the given callback, meaning it was
+	// never registered or was already unregistered from the listeners. Also double check
+	// that we didn't somehow escape the length of the topic callback (not sure how that
+	// would happen, but lets avoid a panic condition).
+	if i < 0 || i >= len(cp.callbacks) {
+		return
+	}
+
+	// We can assume that the topic still exists at this point since we acquire an exclusive
+	// lock on the process, and the "e.index" function cannot return a value >= 0 if there is
+	// no topic already existing.
+	cp.callbacks = append(cp.callbacks[:i], cp.callbacks[i+1:]...)
+}
+
+// Finds the index of a given callback in the topic by comparing all of the registered callback
+// pointers to the passed function. This function does not aquire a lock as it should only be called
+// within the confines of a function that has already acquired a lock for the duration of the lookup.
+func (cp *CallbackPool) index(v reflect.Value) int {
+	for i, handler := range cp.callbacks {
+		if reflect.ValueOf(handler).Pointer() == v.Pointer() {
+			return i
+		}
+	}
+
+	return -1
+}

go.mod

@@ -2,15 +2,8 @@ module github.com/pterodactyl/wings
 
 go 1.13
 
-// Uncomment this in development environments to make changes to the core SFTP
-// server software. This assumes you're using the official Pterodactyl Environment
-// otherwise this path will not work.
-//
-// @see https://github.com/pterodactyl/development
-//
-// replace github.com/pterodactyl/sftp-server => ../sftp-server
-
 require (
+	emperror.dev/errors v0.8.0
 	github.com/AlecAivazis/survey/v2 v2.1.0
 	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
 	github.com/Jeffail/gabs/v2 v2.5.1
@@ -32,6 +25,8 @@ require (
 	github.com/docker/go-metrics v0.0.1 // indirect
 	github.com/docker/go-units v0.4.0 // indirect
 	github.com/fatih/color v1.9.0
+	github.com/franela/goblin v0.0.0-20200825194134-80c0062ed6cd
+	github.com/frankban/quicktest v1.10.2 // indirect
 	github.com/fsnotify/fsnotify v1.4.9 // indirect
 	github.com/gabriel-vasile/mimetype v1.1.1
 	github.com/gammazero/deque v0.0.0-20200721202602-07291166fe33 // indirect
@@ -40,7 +35,6 @@ require (
 	github.com/gin-gonic/gin v1.6.3
 	github.com/go-playground/validator/v10 v10.3.0 // indirect
 	github.com/gogo/protobuf v1.3.1 // indirect
-	github.com/golang/gddo v0.0.0-20200715224205-051695c33a3f // indirect
 	github.com/google/uuid v1.1.1
 	github.com/gorilla/mux v1.7.4 // indirect
 	github.com/gorilla/websocket v1.4.2
@@ -64,27 +58,19 @@ require (
 	github.com/opencontainers/image-spec v1.0.1 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/pierrec/lz4 v2.5.2+incompatible // indirect
-	github.com/pkg/errors v0.9.1
 	github.com/pkg/profile v1.5.0
-	github.com/pkg/sftp v1.11.0 // indirect
+	github.com/pkg/sftp v1.11.0
 	github.com/prometheus/common v0.11.1 // indirect
-	github.com/pterodactyl/sftp-server v1.1.5
 	github.com/remeh/sizedwaitgroup v1.0.0
 	github.com/sabhiram/go-gitignore v0.0.0-20180611051255-d3107576ba94
-	github.com/smartystreets/goconvey v1.6.4 // indirect
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/uber-go/zap v1.9.1 // indirect
 	github.com/ulikunitz/xz v0.5.7 // indirect
-	go.uber.org/zap v1.15.0
 	golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de
-	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
 	golang.org/x/net v0.0.0-20200707034311-ab3426394381 // indirect
 	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
 	golang.org/x/text v0.3.3 // indirect
 	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect
-	golang.org/x/tools v0.0.0-20200509030707-2212a7e161a5 // indirect
-	golang.org/x/tools/gopls v0.1.3 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98 // indirect
 	google.golang.org/grpc v1.31.0 // indirect
@@ -93,5 +79,4 @@ require (
 	gopkg.in/ini.v1 v1.57.0
 	gopkg.in/yaml.v2 v2.3.0
 	gotest.tools v2.2.0+incompatible // indirect
-	honnef.co/go/tools v0.0.1-2020.1.3 // indirect
 )

go.sum

@@ -1,21 +1,16 @@
-cloud.google.com/go v0.16.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/AlecAivazis/survey/v2 v2.0.7 h1:+f825XHLse/hWd2tE/V5df04WFGimk34Eyg/z35w/rc=
+emperror.dev/errors v0.8.0 h1:4lycVEx0sdJkwDUfQ9pdu6SR0x7rgympt5f4+ok8jDk=
-github.com/AlecAivazis/survey/v2 v2.0.7/go.mod h1:mlizQTaPjnR4jcpwRSaSlkbsRfYFEyKgLQvYTzxxiHA=
+emperror.dev/errors v0.8.0/go.mod h1:YcRvLPh626Ubn2xqtoprejnA5nFha+TJ+2vew48kWuE=
 github.com/AlecAivazis/survey/v2 v2.1.0 h1:AT4+23hOFopXYZaNGugbk7MWItkz0SfTmH/Hk92KeeE=
 github.com/AlecAivazis/survey/v2 v2.1.0/go.mod h1:9FJRdMdDm8rnT+zHVbvQT2RTSTLq0Ttd6q3Vl2fahjk=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Jeffail/gabs/v2 v2.2.0 h1:7touC+WzbQ7LO5+mwgxT44miyTqAVCOlIWLA6PiIB5w=
-github.com/Jeffail/gabs/v2 v2.2.0/go.mod h1:xCn81vdHKxFUuWWAaD5jCTQDNPBMh5pPs9IJ+NcziBI=
 github.com/Jeffail/gabs/v2 v2.5.1 h1:ANfZYjpMlfTTKebycu4X1AgkVWumFVDYQl7JwOr4mDk=
 github.com/Jeffail/gabs/v2 v2.5.1/go.mod h1:xCn81vdHKxFUuWWAaD5jCTQDNPBMh5pPs9IJ+NcziBI=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
-github.com/Microsoft/go-winio v0.4.7 h1:vOvDiY/F1avSWlCWiKJjdYKz2jVjTK3pWPHndeG4OAY=
-github.com/Microsoft/go-winio v0.4.7/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=
 github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
 github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
 github.com/NYTimes/logrotate v1.0.0 h1:6jFGbon6jOtpy3t3kwZZKS4Gdmf1C/Wv5J4ll4Xn5yk=
@@ -38,11 +33,8 @@ github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDa
 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
 github.com/apache/thrift v0.13.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
-github.com/apex/log v1.3.0 h1:1fyfbPvUwD10nMoh3hY6MXzvZShJQn9/ck7ATgAt5pA=
-github.com/apex/log v1.3.0/go.mod h1:jd8Vpsr46WAe3EZSQ/IUMs2qQD/GOycT5rPWCO1yGcs=
 github.com/apex/log v1.8.0 h1:+W4j+dttibFvynPLlctdnYFUn1eLKT37BZWWW2iMfEM=
 github.com/apex/log v1.8.0/go.mod h1:m82fZlWIuiWzWP04XCTXmnX0xRkYYbCdYn8jbJeLBEA=
-github.com/apex/logs v0.0.4/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
 github.com/apex/logs v1.0.0/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
 github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE=
 github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys=
@@ -51,8 +43,6 @@ github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
-github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a h1:idn718Q4B6AGu/h5Sxe66HYVdqdGu2l9Iebqhi/AEoA=
-github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/asaskevich/govalidator v0.0.0-20200428143746-21a406dcc535 h1:4daAzAu0S6Vi7/lbWECcX0j45yZReDZ56BQsrVBOEEY=
 github.com/asaskevich/govalidator v0.0.0-20200428143746-21a406dcc535/go.mod h1:oGkLhpf+kjZl6xBf758TQhh5XrAeiJv/7FRz/2spLIg=
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
@@ -68,9 +58,6 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
-github.com/bradfitz/gomemcache v0.0.0-20170208213004-1952afaa557d/go.mod h1:PmM6Mmwb0LSuEubjR8N7PtNe1KxZLtOUHtbeikc5h60=
-github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929 h1:MW/JDk68Rny52yI0M0N+P8lySNgB+NhpI/uAmhgOhUM=
-github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929/go.mod h1:tgcrVJ81GPSF0mz+0nu1Xaz0fazGPrmmJfJtxjbHhUQ=
 github.com/buger/jsonparser v1.0.0 h1:etJTGF5ESxjI0Ic2UaLQs2LQQpa8G9ykQScukbh4L8A=
 github.com/buger/jsonparser v1.0.0/go.mod h1:tgcrVJ81GPSF0mz+0nu1Xaz0fazGPrmmJfJtxjbHhUQ=
 github.com/casbin/casbin/v2 v2.1.2/go.mod h1:YcPU1XXisHhLzuxH9coDNf2FbKpjGlbCg3n9yuLkIJQ=
@@ -87,12 +74,8 @@ github.com/cobaugh/osrelease v0.0.0-20181218015638-a93a0a55a249 h1:R0IDH8daQ3lOD
 github.com/cobaugh/osrelease v0.0.0-20181218015638-a93a0a55a249/go.mod h1:EHKW9yNEYSBpTKzuu7Y9oOrft/UlzH57rMIB03oev6M=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
-github.com/containerd/containerd v1.3.6 h1:SMfcKoQyWhaRsYq7290ioC6XFcHDNcHvcEMjF6ORpac=
-github.com/containerd/containerd v1.3.6/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
 github.com/containerd/containerd v1.3.7 h1:eFSOChY8TTcxvkzp8g+Ov1RL0MYww7XEeK0y+zqGpVc=
 github.com/containerd/containerd v1.3.7/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
-github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448 h1:PUD50EuOMkXVcpBIA/R95d56duJR9VxhwncsFbNnxW4=
-github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448/go.mod h1:ODA38xgv3Kuk8dQz2ZQXpnv/UZZUHUCL7pnLehbXgQI=
 github.com/containerd/fifo v0.0.0-20200410184934-f15a3290365b h1:qUtCegLdOUVfVJOw+KDg6eJyE1TGvLlkGEd1091kSSQ=
 github.com/containerd/fifo v0.0.0-20200410184934-f15a3290365b/go.mod h1:jPQ2IAeZRCYxpS/Cm1495vGFww6ecHmMk1YJH2Q5ln0=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -105,8 +88,6 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
-github.com/creasty/defaults v1.3.0 h1:uG+RAxYbJgOPCOdKEcec9ZJXeva7Y6mj/8egdzwmLtw=
-github.com/creasty/defaults v1.3.0/go.mod h1:CIEEvs7oIVZm30R8VxtFJs+4k201gReYyuYHJxZc68I=
 github.com/creasty/defaults v1.5.0 h1:DW6NAGGaKuNSKkntc8BCBrR2KOUAcXVnfcwu/LmJhaQ=
 github.com/creasty/defaults v1.5.0/go.mod h1:FPZ+Y0WNrbqOVw+c6av63eyHUAl6pMHZwqLPvXUZGfY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -124,8 +105,6 @@ github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKoh
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-metrics v0.0.1 h1:AgB/0SvBxihN0X8OR4SjsblXkbMvalQ8cjmtKQ2rQV8=
 github.com/docker/go-metrics v0.0.1/go.mod h1:cG1hvH2utMXtqgqqYE9plW6lDxS3/5ayHzueweSI3Vw=
-github.com/docker/go-units v0.3.3 h1:Xk8S3Xj5sLGlG5g67hJmYMmUgXv5N4PhkjJHHqrwnTk=
-github.com/docker/go-units v0.3.3/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw=
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/dsnet/compress v0.0.1 h1:PlZu0n3Tuv04TzpfPbrnI0HW/YwodEXDS+oPKahKF0Q=
@@ -146,27 +125,23 @@ github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5Kwzbycv
 github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/franela/goblin v0.0.0-20200105215937-c9ffbefa60db/go.mod h1:7dvUGVsVBjqR7JHJk0brhHOZYGmfBYOrK0ZhYMEtBr4=
+github.com/franela/goblin v0.0.0-20200825194134-80c0062ed6cd h1:b/30UOB56Rhfe185ZfgvZT0/HOql0OzxuiNOxRKXRXc=
+github.com/franela/goblin v0.0.0-20200825194134-80c0062ed6cd/go.mod h1:VzmDKDJVZI3aJmnRI9VjAn9nJ8qPPsN1fqzr9dqInIo=
 github.com/franela/goreq v0.0.0-20171204163338-bcd34c9993f8/go.mod h1:ZhphrRTfi2rbfLwlschooIH4+wKKDR4Pdxhh+TRoA20=
-github.com/fsnotify/fsnotify v1.4.3-0.20170329110642-4da3e2cfbabc/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/frankban/quicktest v1.10.2 h1:19ARM85nVi4xH7xPXuc5eM/udya5ieh7b/Sv+d844Tk=
+github.com/frankban/quicktest v1.10.2/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/gabriel-vasile/mimetype v0.1.4 h1:5mcsq3+DXypREUkW+1juhjeKmE/XnWgs+paHMJn7lf8=
-github.com/gabriel-vasile/mimetype v0.1.4/go.mod h1:kMJbg3SlWZCsj4R73F1WDzbT9AyGCOVmUtIxxwO5pmI=
 github.com/gabriel-vasile/mimetype v1.1.1 h1:qbN9MPuRf3bstHu9zkI9jDWNfH//9+9kHxr9oRBBBOA=
 github.com/gabriel-vasile/mimetype v1.1.1/go.mod h1:6CDPel/o/3/s4+bp6kIbsWATq8pmgOisOPG40CJa6To=
 github.com/gammazero/deque v0.0.0-20200227231300-1e9af0e52b46 h1:iX4+rD9Fjdx8SkmSO/O5WAIX/j79ll3kuqv5VdYt9J8=
 github.com/gammazero/deque v0.0.0-20200227231300-1e9af0e52b46/go.mod h1:D90+MBHVc9Sk1lJAbEVgws0eYEurY4mv2TDso3Nxh3w=
 github.com/gammazero/deque v0.0.0-20200721202602-07291166fe33 h1:UG4wNrJX9xSKnm/Gck5yTbxnOhpNleuE4MQRdmcGySo=
 github.com/gammazero/deque v0.0.0-20200721202602-07291166fe33/go.mod h1:D90+MBHVc9Sk1lJAbEVgws0eYEurY4mv2TDso3Nxh3w=
-github.com/gammazero/workerpool v0.0.0-20200608033439-1a5ca90a5753 h1:oSQ61LxZkz3Z4La0O5cbyVDvLWEfbNgiD43cSPdjPQQ=
-github.com/gammazero/workerpool v0.0.0-20200608033439-1a5ca90a5753/go.mod h1:/XWO2YAUUpPi3smDlFBl0vpX0JHwUomDM/oRMwRmnSs=
 github.com/gammazero/workerpool v1.0.0 h1:MfkJc6KL0tAmjrRDS203AZz3F+84Uod9YbL8KjpcQ00=
 github.com/gammazero/workerpool v1.0.0/go.mod h1:/XWO2YAUUpPi3smDlFBl0vpX0JHwUomDM/oRMwRmnSs=
-github.com/garyburd/redigo v1.1.1-0.20170914051019-70e1b1943d4f/go.mod h1:NR3MbYisc3/PwhQ00EMzDiPmrwpPxAn5GI05/YaO1SY=
-github.com/gbrlsnchs/jwt/v3 v3.0.0-rc.0 h1:7KeiSrO5puFH1+vdAdbpiie2TrNnkvFc/eOQzT60Z2k=
-github.com/gbrlsnchs/jwt/v3 v3.0.0-rc.0/go.mod h1:D1+3UtCYAJ1os1PI+zhTVEj6Tb+IHJvXjXKz83OstmM=
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 github.com/ghodss/yaml v1.0.0 h1:wQHKEahhL6wmXdzwWG11gIVCkOv05bNOh+Rxn0yngAk=
@@ -193,7 +168,6 @@ github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GO
 github.com/go-playground/validator/v10 v10.3.0 h1:nZU+7q+yJoFmwvNgv/LnPUkwPal62+b2xXj0AU1Es7o=
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-github.com/go-stack/stack v1.6.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
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@@ -204,20 +178,16 @@ github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
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-github.com/golang/gddo v0.0.0-20200715224205-051695c33a3f/go.mod h1:sam69Hju0uq+5uvLJUMDlsKlQ21Vrs1Kd/1YFPNYdOU=
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-github.com/golang/lint v0.0.0-20170918230701-e5d664eb928e/go.mod h1:tluoj9z5200jBnyusfRPU2LqT6J+DAorxEvtC7LHB+E=
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-github.com/golang/protobuf v1.3.5 h1:F768QJ1E9tib+q5Sc8MkdJi1RxLTbRcTf8LJV56aRls=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
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@@ -226,25 +196,25 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
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-github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
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-github.com/google/go-cmp v0.1.1-0.20171103154506-982329095285/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
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-github.com/googleapis/gax-go v2.0.0+incompatible/go.mod h1:SFVmujtThgffbyetf+mdk2eWhX2bMyUtNHzFKcPA9HY=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
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@@ -257,7 +227,6 @@ github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
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 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/gregjones/httpcache v0.0.0-20170920190843-316c5e0ff04e/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
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@@ -279,7 +248,6 @@ github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09
 github.com/hashicorp/go.net v0.0.1/go.mod h1:hjKkEWcCURg++eb33jQU7oqQcI9XDCnUzHA0oac0k90=
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-github.com/hashicorp/hcl v0.0.0-20170914154624-68e816d1c783/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
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 github.com/hashicorp/mdns v1.0.0/go.mod h1:tL+uN++7HEJ6SQLQ2/p+z2pH24WQKWjBPkE0mNTz8vQ=
@@ -295,9 +263,6 @@ github.com/icza/dyno v0.0.0-20200205103839-49cb13720835 h1:f1irK5f03uGGj+FjgQfZ5
 github.com/icza/dyno v0.0.0-20200205103839-49cb13720835/go.mod h1:c1tRKs5Tx7E2+uHGSyyncziFjvGpgv4H2HrqXeUQ/Uk=
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-github.com/imdario/mergo v0.3.10 h1:6q5mVkdH/vYmqngx7kZQTjJ5HRsx+ImorDIEQ+beJgc=
-github.com/imdario/mergo v0.3.10/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
-github.com/inconshreveable/log15 v0.0.0-20170622235902-74a0988b5f80/go.mod h1:cOaXtrgN4ScfRrD9Bre7U1thNq5RtJ8ZoP4iXVGRj6o=
 github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
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@@ -332,8 +297,6 @@ github.com/klauspost/compress v1.10.10/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdY
 github.com/klauspost/cpuid v1.2.0/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
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 github.com/klauspost/pgzip v1.2.1/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
-github.com/klauspost/pgzip v1.2.3 h1:Ce2to9wvs/cuJ2b86/CKQoTYr9VHfpanYosZ0UBJqdw=
-github.com/klauspost/pgzip v1.2.3/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
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@@ -346,6 +309,8 @@ github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFB
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
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+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
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 github.com/kr/pty v1.1.4/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -360,12 +325,10 @@ github.com/magefile/mage v1.9.0 h1:t3AU2wNwehMCW97vuqQLtw6puppWXHO+O2MHo5a50XE=
 github.com/magefile/mage v1.9.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
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 github.com/magefile/mage v1.10.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
-github.com/magiconair/properties v1.7.4-0.20170902060319-8d7837e64d3c/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/magiconair/properties v1.8.1 h1:ZC2Vc7/ZFkGmsVC9KvOjumD+G5lXy2RtTKyzRKO2BQ4=
 github.com/magiconair/properties v1.8.1/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
-github.com/mattn/go-colorable v0.0.10-0.20170816031813-ad5389df28cd/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
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@@ -373,7 +336,6 @@ github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaa
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@@ -402,7 +364,6 @@ github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eI
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-github.com/mitchellh/mapstructure v0.0.0-20170523030023-d0303fe80992/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
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@@ -436,8 +397,6 @@ github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
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-github.com/opencontainers/go-digest v1.0.0-rc1 h1:WzifXhOVOEOuFYOJAW6aQqW0TooG2iki3E3Ii+WN7gQ=
-github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
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@@ -455,10 +414,8 @@ github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FI
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-github.com/pelletier/go-toml v1.0.1-0.20170904195809-1d6b12b7cb29/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
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-github.com/pierrec/lz4 v1.0.1 h1:w6GMGWSsCI04fTM8wQRdnW74MuJISakuUU0onU0TYB4=
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@@ -471,12 +428,8 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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-github.com/pkg/profile v1.4.0 h1:uCmaf4vVbWAOZz36k1hrQD7ijGRzLwaME8Am/7a4jZI=
-github.com/pkg/profile v1.4.0/go.mod h1:NWz/XGvpEW1FyYQ7fCx4dqYBLlfTcE+A9FLAkNKqjFE=
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-github.com/pkg/sftp v1.8.3 h1:9jSe2SxTM8/3bXZjtqnkgTBW+lA8db0knZJyns7gpBA=
-github.com/pkg/sftp v1.8.3/go.mod h1:NxmoDg/QLVWluQDUYG7XBZTLUpKeFa8e3aMf1BfjyHk=
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@@ -519,13 +472,7 @@ github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+Gx
 github.com/prometheus/procfs v0.1.3 h1:F0+tqvhOksq22sc6iCHF5WGlWjdwj92p0udFh1VFBS8=
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-github.com/pterodactyl/sftp-server v1.1.4 h1:JESuEuZ+d2tajMjuQblPOlGISM9Uc2xOzk7irVF9PQ0=
-github.com/pterodactyl/sftp-server v1.1.4/go.mod h1:KjSONrenRr1oCh94QIVAU6yEzMe+Hd7r/JHrh5/oQHs=
-github.com/pterodactyl/sftp-server v1.1.5 h1:r5RIfCDVLpn6MsfD8zcCQLtviy14GJ9E+9HzidjgAGw=
-github.com/pterodactyl/sftp-server v1.1.5/go.mod h1:YVx5g2gjln7fYFO7+c3iDRTwNyA5GuJtkKME0UDB8co=
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-github.com/remeh/sizedwaitgroup v0.0.0-20180822144253-5e7302b12cce h1:aP+C+YbHZfOQlutA4p4soHi7rVUqHQdWEVMSkHfDTqY=
-github.com/remeh/sizedwaitgroup v0.0.0-20180822144253-5e7302b12cce/go.mod h1:3j2R4OIe/SeS6YDhICBy22RWjJC5eNCJ1V+9+NVNYlo=
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@@ -556,24 +503,17 @@ github.com/smartystreets/gunit v1.0.0/go.mod h1:qwPWnhz6pn0NnRBP++URONOVyNkPyr4S
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
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-github.com/spf13/afero v0.0.0-20170901052352-ee1bd8ee15a1/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
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-github.com/spf13/cast v1.1.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
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-github.com/spf13/cobra v0.0.7 h1:FfTH+vuMXOas8jmfb5/M7dzEYx7LpcLb7a0LPe34uOU=
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-github.com/spf13/pflag v1.0.1-0.20170901120850-7aff26db30c1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
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-github.com/spf13/viper v1.0.0/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7SrnBM=
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@@ -585,11 +525,11 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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-github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
-github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
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 github.com/tj/assert v0.0.0-20171129193455-018094318fb0 h1:Rw8kxzWo1mr6FSaYXjQELRe88y2KdfynXdnK72rdjtA=
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@@ -598,7 +538,6 @@ github.com/tj/go-spin v1.1.0 h1:lhdWZsvImxvZ3q1C5OIB7d72DuOwP4O2NdBg9PyzNds=
 github.com/tj/go-spin v1.1.0/go.mod h1:Mg1mzmePZm4dva8Qz60H2lHwmJ2loum4VIrLgVnKwh4=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20170815181823-89b8d40f7ca8/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
-github.com/uber-go/zap v1.9.1/go.mod h1:GY+83l3yxBcBw2kmHu/sAWwItnTn+ynxHCRo+WiIQOY=
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@@ -614,7 +553,6 @@ github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 h1:nIPpBwaJSVYIxUFsDv3M8ofm
 github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8/go.mod h1:HUYIGzjTL3rfEspMxjDjgmT5uz5wzYJKVo23qUhYTos=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
@@ -625,23 +563,18 @@ go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
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-go.uber.org/atomic v1.6.0 h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=
+go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
-go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
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-go.uber.org/multierr v1.5.0 h1:KCa4XfM8CWFCpxXRGok+Q0SS/0XBhMDbHHGABQLvD2A=
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-go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
+go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
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-go.uber.org/zap v1.15.0 h1:ZZCA22JRF2gQE5FoNmhmrf7jeJJ2uhqDUNRYKm8dvmM=
-go.uber.org/zap v1.15.0/go.mod h1:Mb2vm2krFEG5DV0W9qcHBYFtp/Wku1cvYaqPsS/WYfc=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20181025213731-e84da0312774/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -649,11 +582,8 @@ golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190530122614-20be4c3c3ed5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190829043050-9756ffdc2472/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190927123631-a832865fa7ad/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200429183012-4b2356b1ed79 h1:IaQbIIB2X/Mp/DKctl6ROxz1KyMlKp4uyvL6+kQ7C88=
-golang.org/x/crypto v0.0.0-20200429183012-4b2356b1ed79/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de h1:ikNHVSjEfnvz6sxdSPCaPt572qowuyMDMJLLm3Db3ig=
 golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
@@ -662,16 +592,11 @@ golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTk
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190301231843-5614ed5bae6f/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de h1:5hukYrvBGR8/eNkX5mdUezrA6JiaEZDtJb9Ei+1LlBs=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
-golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
-golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -689,16 +614,11 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
-golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381 h1:VXak5I6aEWmAXeQjA+QSZzlgNrpq9mjcfDemuexIKsU=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/oauth2 v0.0.0-20170912212905-13449ad91cb2/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/sync v0.0.0-20170517211232-f52d1811a629/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -707,8 +627,6 @@ golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
-golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -737,19 +655,15 @@ golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200509044756-6aff5f38e54f h1:mOhmO9WsBaJCNmaZHPtHs9wOcdqdKCjF6OPJlmDM3KI=
-golang.org/x/sys v0.0.0-20200509044756-6aff5f38e54f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200806125547-5acd03effb82 h1:6cBnXxYO+CiRVrChvCosSv7magqTPbyAgz1M8iOv5wM=
-golang.org/x/sys v0.0.0-20200806125547-5acd03effb82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/time v0.0.0-20170424234030-8be79e1e0910/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4 h1:SvFZT6jyqRaOeXpc5h/JSfZenJ2O330aBsf7JfSUXmQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -767,18 +681,11 @@ golang.org/x/tools v0.0.0-20190312170243-e65039ee4138/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190710153321-831012c29e42/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
 golang.org/x/tools v0.0.0-20190927191325-030b2cf1153e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5 h1:hKsoRgsbwY1NafxrwTs+k64bikrLBkAgPir1TNCj3Zs=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191130070609-6e064ea0cf2d/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200509030707-2212a7e161a5 h1:MeC2gMlMdkd67dn17MEby3rGXRxZtWeiRXOnISfTQ74=
-golang.org/x/tools v0.0.0-20200509030707-2212a7e161a5/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools/gopls v0.1.3/go.mod h1:vrCQzOKxvuiZLjCKSmbbov04oeBQQOb4VQqwYK2PWIY=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 h1:9zdDQZ7Thm29KFXgAX/+yaf3eVbP7djjWp/dXAppNCc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -786,13 +693,10 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IV
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/api v0.0.0-20170921000349-586095a6e407/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
-google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
-google.golang.org/genproto v0.0.0-20170918111702-1e559d0a00ee/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8 h1:Nw54tB0rB7hY/N0NQvRW8DG4Yk3Q6T9cu9RcFQDu1tc=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -802,7 +706,6 @@ google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98 h1:LCO0fg4kb6WwkXQXRQQgUYsFeFb5taTX5WAx5O/Vt28=
 google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
-google.golang.org/grpc v1.2.1-0.20170921194603-d4b75ebd4f9f/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.0/go.mod h1:chYK+tFQF0nDUGJgXMSgLCQk3phJEuONr2DCgLDdAQM=
@@ -840,8 +743,6 @@ gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qS
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
-gopkg.in/ini.v1 v1.51.0 h1:AQvPpx3LzTDM0AjnIRlVFwFFGC+npRopjZxLJj6gdno=
-gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.57.0 h1:9unxIsFcTt4I55uWluz+UmL95q4kdJ0buvQ1ZIqVQww=
 gopkg.in/ini.v1 v1.57.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
@@ -858,6 +759,7 @@ gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c h1:grhR+C34yXImVGp7EzNk+DTIk+323eIUWOmEevy6bDo=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
@@ -866,7 +768,5 @@ honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
-honnef.co/go/tools v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
-honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=

installer/installer.go

@@ -1,17 +1,13 @@
 package installer
 
 import (
+	"emperror.dev/errors"
 	"encoding/json"
-	"github.com/apex/log"
 	"github.com/asaskevich/govalidator"
 	"github.com/buger/jsonparser"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
-	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/server"
-	"os"
-	"path"
 )
 
 type Installer struct {
@@ -26,14 +22,11 @@ func New(data []byte) (*Installer, error) {
 		return nil, NewValidationError("uuid provided was not in a valid format")
 	}
 
-	if !govalidator.IsUUIDv4(getString(data, "service", "egg")) {
-		return nil, NewValidationError("service egg provided was not in a valid format")
-	}
-
 	cfg := &server.Configuration{
-		Uuid:       getString(data, "uuid"),
+		Uuid:           getString(data, "uuid"),
-		Suspended:  false,
+		Suspended:      false,
-		Invocation: getString(data, "invocation"),
+		Invocation:     getString(data, "invocation"),
+		SkipEggScripts: getBoolean(data, "skip_egg_scripts"),
 		Build: environment.Limits{
 			MemoryLimit: getInt(data, "build", "memory"),
 			Swap:        getInt(data, "build", "swap"),
@@ -50,33 +43,33 @@ func New(data []byte) (*Installer, error) {
 
 	// Unmarshal the environment variables from the request into the server struct.
 	if b, _, _, err := jsonparser.Get(data, "environment"); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	} else {
 		cfg.EnvVars = make(environment.Variables)
 		if err := json.Unmarshal(b, &cfg.EnvVars); err != nil {
-			return nil, errors.WithStack(err)
+			return nil, errors.WithStackIf(err)
 		}
 	}
 
 	// Unmarshal the allocation mappings from the request into the server struct.
 	if b, _, _, err := jsonparser.Get(data, "allocations", "mappings"); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	} else {
 		cfg.Allocations.Mappings = make(map[string][]int)
 		if err := json.Unmarshal(b, &cfg.Allocations.Mappings); err != nil {
-			return nil, errors.WithStack(err)
+			return nil, errors.WithStackIf(err)
 		}
 	}
 
 	cfg.Container.Image = getString(data, "container", "image")
 
-	c, rerr, err := api.NewRequester().GetServerConfiguration(cfg.Uuid)
+	c, err := api.New().GetServerConfiguration(cfg.Uuid)
-	if err != nil || rerr != nil {
+	if err != nil {
-		if err != nil {
+		if !api.IsRequestError(err) {
-			return nil, errors.WithStack(err)
+			return nil, errors.WithStackIf(err)
 		}
 
-		return nil, errors.New(rerr.String())
+		return nil, errors.New(err.Error())
 	}
 
 	// Create a new server instance using the configuration we wrote to the disk
@@ -98,34 +91,6 @@ func (i *Installer) Server() *server.Server {
 	return i.server
 }
 
-// Executes the installer process, creating the server and running through the
-// associated installation process based on the parameters passed through for
-// the server instance.
-func (i *Installer) Execute() {
-	p := path.Join(config.Get().System.Data, i.Uuid())
-	l := log.WithFields(log.Fields{"server": i.Uuid(), "process": "installer"})
-
-	l.WithField("path", p).Debug("creating required server data directory")
-	if err := os.MkdirAll(p, 0755); err != nil {
-		l.WithFields(log.Fields{"path": p, "error": errors.WithStack(err)}).Error("failed to create server data directory")
-		return
-	}
-
-	if err := os.Chown(p, config.Get().System.User.Uid, config.Get().System.User.Gid); err != nil {
-		l.WithField("error", errors.WithStack(err)).Error("failed to chown server data directory")
-		return
-	}
-
-	l.Debug("creating required environment for server instance")
-	// TODO: ensure data directory exists.
-	if err := i.server.Environment.Create(); err != nil {
-		l.WithField("error", err).Error("failed to create environment for server")
-		return
-	}
-
-	l.Info("successfully created environment for server during install process")
-}
-
 // Returns a string value from the JSON data provided.
 func getString(data []byte, key ...string) string {
 	value, _ := jsonparser.GetString(data, key...)
@@ -139,3 +104,9 @@ func getInt(data []byte, key ...string) int64 {
 
 	return value
 }
+
+func getBoolean(data []byte, key ...string) bool {
+	value, _ := jsonparser.GetBoolean(data, key...)
+
+	return value
+}

loggers/cli/cli.go

@@ -6,7 +6,7 @@ import (
 	"github.com/apex/log/handlers/cli"
 	color2 "github.com/fatih/color"
 	"github.com/mattn/go-colorable"
-	"github.com/pkg/errors"
+	"emperror.dev/errors"
 	"io"
 	"os"
 	"sync"
@@ -88,10 +88,10 @@ func getErrorStack(err error, i bool) errors.StackTrace {
 		if i {
 			// Just abort out of this and return a stacktrace leading up to this point. It isn't perfect
 			// but it'll at least include what function lead to this being called which we can then handle.
-			return errors.Wrap(err, "failed to generate stacktrace for caught error").(tracer).StackTrace()
+			return errors.WrapIf(err, "failed to generate stacktrace for caught error").(tracer).StackTrace()
 		}
 
-		return getErrorStack(errors.Wrap(err, err.Error()), true)
+		return getErrorStack(errors.WrapIf(err, err.Error()), true)
 	}
 
 	st := e.StackTrace()
@@ -101,7 +101,7 @@ func getErrorStack(err error, i bool) errors.StackTrace {
 	// trace since they'll point to the error that was generated by this function.
 	f := 0
 	if i {
-		f = 4
+		f = 5
 	}
 
 	if i && l > 9 {

parser/helpers.go

@@ -2,11 +2,11 @@ package parser
 
 import (
 	"bytes"
+	"emperror.dev/errors"
 	"github.com/Jeffail/gabs/v2"
 	"github.com/apex/log"
 	"github.com/buger/jsonparser"
 	"github.com/iancoleman/strcase"
-	"github.com/pkg/errors"
 	"io/ioutil"
 	"os"
 	"regexp"
@@ -76,13 +76,13 @@ func (cfr *ConfigurationFileReplacement) getKeyValue(value []byte) interface{} {
 func (f *ConfigurationFile) IterateOverJson(data []byte) (*gabs.Container, error) {
 	parsed, err := gabs.ParseJSON(data)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
 	}
 
 	for _, v := range f.Replace {
 		value, err := f.LookupConfigurationValue(v)
 		if err != nil {
-			return nil, err
+			return nil, errors.WithStackIf(err)
 		}
 
 		// Check for a wildcard character, and if found split the key on that value to
@@ -97,12 +97,20 @@ func (f *ConfigurationFile) IterateOverJson(data []byte) (*gabs.Container, error
 			// time this code is being written.
 			for _, child := range parsed.Path(strings.Trim(parts[0], ".")).Children() {
 				if err := v.SetAtPathway(child, strings.Trim(parts[1], "."), []byte(value)); err != nil {
-					return nil, err
+					if errors.Is(err, gabs.ErrNotFound) {
+						continue
+					}
+
+					return nil, errors.WrapIf(err, "failed to set config value of array child")
 				}
 			}
 		} else {
 			if err = v.SetAtPathway(parsed, v.Match, []byte(value)); err != nil {
-				return nil, err
+				if errors.Is(err, gabs.ErrNotFound) {
+					continue
+				}
+
+				return nil, errors.WrapIf(err, "unable to set config value at pathway: "+v.Match)
 			}
 		}
 	}
@@ -110,42 +118,113 @@ func (f *ConfigurationFile) IterateOverJson(data []byte) (*gabs.Container, error
 	return parsed, nil
 }
 
-// Sets the value at a specific pathway, but checks if we were looking for a specific
+// Regex used to check if there is an array element present in the given pathway by looking for something
-// value or not before doing it.
+// along the lines of "something[1]" or "something[1].nestedvalue" as the path.
-func (cfr *ConfigurationFileReplacement) SetAtPathway(c *gabs.Container, path string, value []byte) error {
+var checkForArrayElement = regexp.MustCompile(`^([^\[\]]+)\[([\d]+)](\..+)?$`)
-	if cfr.IfValue != "" {
-		// If this is a regex based matching, we need to get a little more creative since
-		// we're only going to replacing part of the string, and not the whole thing.
-		if c.Exists(path) && strings.HasPrefix(cfr.IfValue, "regex:") {
-			// We're doing some regex here.
-			r, err := regexp.Compile(strings.TrimPrefix(cfr.IfValue, "regex:"))
-			if err != nil {
-				log.WithFields(log.Fields{"if_value": strings.TrimPrefix(cfr.IfValue, "regex:"), "error": err}).
-					Warn("configuration if_value using invalid regexp, cannot perform replacement")
 
-				return nil
+// Attempt to set the value of the path depending on if it is an array or not. Gabs cannot handle array
-			}
+// values as "something[1]" but can parse them just fine. This is basically just overly complex code
+// to handle that edge case and ensure the value gets set correctly.
+//
+// Bless thee who has to touch these most unholy waters.
+func setValueAtPath(c *gabs.Container, path string, value interface{}) error {
+	var err error
 
-			// If the path exists and there is a regex match, go ahead and attempt the replacement
+	matches := checkForArrayElement.FindStringSubmatch(path)
-			// using the value we got from the key. This will only replace the one match.
+	if len(matches) < 3 {
-			v := strings.Trim(string(c.Path(path).Bytes()), "\"")
+		// Only update the value if the pathway actually exists in the configuration, otherwise
-			if r.Match([]byte(v)) {
+		// do nothing.
-				_, err := c.SetP(r.ReplaceAllString(v, string(value)), path)
+		if c.ExistsP(path) {
+			_, err = c.SetP(value, path)
+		}
 
-				return err
+		return errors.WithStackIf(err)
-			}
+	}
 
-			return nil
+	i, _ := strconv.Atoi(matches[2])
-		} else {
+	// Find the array element "i" or try to create it if "i" is equal to 0 and is not found
-			if !c.Exists(path) || (c.Exists(path) && !bytes.Equal(c.Bytes(), []byte(cfr.IfValue))) {
+	// at the given path.
-				return nil
+	ct, err := c.ArrayElementP(i, matches[1])
-			}
+	if err != nil {
+		if i != 0 || (!errors.Is(err, gabs.ErrNotArray) && !errors.Is(err, gabs.ErrNotFound)) {
+			return errors.WrapIf(err, "error while parsing array element at path")
+		}
+
+		var t = make([]interface{}, 1)
+		// If the length of matches is 4 it means we're trying to access an object down in this array
+		// key, so make sure we generate the array as an array of objects, and not just a generic nil
+		// array.
+		if len(matches) == 4 {
+			t = []interface{}{map[string]interface{}{}}
+		}
+
+		// If the error is because this isn't an array or isn't found go ahead and create the array with
+		// an empty object if we have additional things to set on the array, or just an empty array type
+		// if there is not an object structure detected (no matches[3] available).
+		if _, err = c.SetP(t, matches[1]); err != nil {
+			return errors.WrapIf(err, "failed to create empty array for missing element")
+		}
+
+		// Set our cursor to be the array element we expect, which in this case is just the first element
+		// since we won't run this code unless the array element is 0. There is too much complexity in trying
+		// to match additional elements. In those cases the server will just have to be rebooted or something.
+		ct, err = c.ArrayElementP(0, matches[1])
+		if err != nil {
+			return errors.WrapIf(err, "failed to find array element at path")
 		}
 	}
 
-	_, err := c.SetP(cfr.getKeyValue(value), path)
+	// Try to set the value. If the path does not exist an error will be raised to the caller which will
+	// then check if the error is because the path is missing. In those cases we just ignore the error since
+	// we don't want to do anything specifically when that happens.
+	//
+	// If there are four matches in the regex it means that we managed to also match a trailing pathway
+	// for the key, which should be found in the given array key item and modified further.
+	if len(matches) == 4 {
+		_, err = ct.SetP(value, strings.TrimPrefix(matches[3], "."))
+	} else {
+		_, err = ct.Set(value)
+	}
 
-	return err
+	if err != nil {
+		return errors.WrapIf(err, "failed to set value at config path: "+path)
+	}
+
+	return nil
+}
+
+// Sets the value at a specific pathway, but checks if we were looking for a specific
+// value or not before doing it.
+func (cfr *ConfigurationFileReplacement) SetAtPathway(c *gabs.Container, path string, value []byte) error {
+	if cfr.IfValue == "" {
+		return setValueAtPath(c, path, cfr.getKeyValue(value))
+	}
+
+	// If this is a regex based matching, we need to get a little more creative since
+	// we're only going to replacing part of the string, and not the whole thing.
+	if c.ExistsP(path) && strings.HasPrefix(cfr.IfValue, "regex:") {
+		// We're doing some regex here.
+		r, err := regexp.Compile(strings.TrimPrefix(cfr.IfValue, "regex:"))
+		if err != nil {
+			log.WithFields(log.Fields{"if_value": strings.TrimPrefix(cfr.IfValue, "regex:"), "error": err}).
+				Warn("configuration if_value using invalid regexp, cannot perform replacement")
+
+			return nil
+		}
+
+		// If the path exists and there is a regex match, go ahead and attempt the replacement
+		// using the value we got from the key. This will only replace the one match.
+		v := strings.Trim(string(c.Path(path).Bytes()), "\"")
+		if r.Match([]byte(v)) {
+			return setValueAtPath(c, path, r.ReplaceAllString(v, string(value)))
+		}
+
+		return nil
+	} else if !c.ExistsP(path) || (c.ExistsP(path) && !bytes.Equal(c.Bytes(), []byte(cfr.IfValue))) {
+		return nil
+	}
+
+	return setValueAtPath(c, path, cfr.getKeyValue(value))
 }
 
 // Looks up a configuration value on the Daemon given a dot-notated syntax.
@@ -174,7 +253,7 @@ func (f *ConfigurationFile) LookupConfigurationValue(cfr ConfigurationFileReplac
 	match, _, _, err := jsonparser.Get(f.configuration, path...)
 	if err != nil {
 		if err != jsonparser.KeyPathNotFoundError {
-			return string(match), errors.WithStack(err)
+			return string(match), errors.WithStackIf(err)
 		}
 
 		log.WithFields(log.Fields{"path": path, "filename": f.FileName}).Debug("attempted to load a configuration value that does not exist")

parser/parser.go

@@ -2,20 +2,20 @@ package parser
 
 import (
 	"bufio"
+	"emperror.dev/errors"
 	"encoding/json"
-	"fmt"
 	"github.com/apex/log"
 	"github.com/beevik/etree"
 	"github.com/buger/jsonparser"
 	"github.com/icza/dyno"
 	"github.com/magiconair/properties"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"gopkg.in/ini.v1"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"os"
-	"regexp"
+	"path/filepath"
+	"strconv"
 	"strings"
 )
 
@@ -76,11 +76,6 @@ func (f *ConfigurationFile) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
-// Regex to match paths such as foo[1].bar[2] and convert them into a format that
-// gabs can work with, such as foo.1.bar.2 in this case. This is applied when creating
-// the struct for the configuration file replacements.
-var cfrMatchReplacement = regexp.MustCompile(`\[(\d+)]`)
-
 // Defines a single find/replace instance for a given server configuration file.
 type ConfigurationFileReplacement struct {
 	Match       string       `json:"match"`
@@ -96,8 +91,7 @@ func (cfr *ConfigurationFileReplacement) UnmarshalJSON(data []byte) error {
 		return err
 	}
 
-	// See comment on the replacement regex to understand what exactly this is doing.
+	cfr.Match = m
-	cfr.Match = cfrMatchReplacement.ReplaceAllString(m, ".$1")
 
 	iv, err := jsonparser.GetString(data, "if_value")
 	// We only check keypath here since match & replace_with should be present on all of
@@ -163,21 +157,26 @@ func (f *ConfigurationFile) Parse(path string, internal bool) error {
 		break
 	}
 
-	if os.IsNotExist(err) {
+	if errors.Is(err, os.ErrNotExist) {
 		// File doesn't exist, we tried creating it, and same error is returned? Pretty
 		// sure this pathway is impossible, but if not, abort here.
 		if internal {
 			return nil
 		}
 
-		if _, err := os.Create(path); err != nil {
+		b := strings.TrimSuffix(path, filepath.Base(path))
-			return errors.WithStack(err)
+		if err := os.MkdirAll(b, 0755); err != nil {
+			return errors.WrapIf(err, "failed to create base directory for missing configuration file")
+		} else {
+			if _, err := os.Create(path); err != nil {
+				return errors.WrapIf(err, "failed to create missing configuration file")
+			}
 		}
 
 		return f.Parse(path, true)
 	}
 
-	return errors.WithStack(err)
+	return errors.WithStackIf(err)
 }
 
 // Parses an xml file.
@@ -349,33 +348,33 @@ func (f *ConfigurationFile) parseJsonFile(path string) error {
 func (f *ConfigurationFile) parseYamlFile(path string) error {
 	b, err := readFileBytes(path)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	i := make(map[string]interface{})
 	if err := yaml.Unmarshal(b, &i); err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	// Unmarshal the yaml data into a JSON interface such that we can work with
 	// any arbitrary data structure. If we don't do this, I can't use gabs which
-	// makes working with unknown JSON signficiantly easier.
+	// makes working with unknown JSON significantly easier.
 	jsonBytes, err := json.Marshal(dyno.ConvertMapI2MapS(i))
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	// Now that the data is converted, treat it just like JSON and pass it to the
 	// iterator function to update values as necessary.
 	data, err := f.IterateOverJson(jsonBytes)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	// Remarshal the JSON into YAML format before saving it back to the disk.
 	marshaled, err := yaml.Marshal(data.Data())
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	return ioutil.WriteFile(path, marshaled, 0644)
@@ -385,39 +384,26 @@ func (f *ConfigurationFile) parseYamlFile(path string) error {
 // scanning a file and performing a replacement. You should attempt to use anything other
 // than this function where possible.
 func (f *ConfigurationFile) parseTextFile(path string) error {
-	file, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0644)
+	input, err := ioutil.ReadFile(path)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
-	defer file.Close()
 
-	scanner := bufio.NewScanner(file)
+	lines := strings.Split(string(input), "\n")
-	for scanner.Scan() {
+	for i, line := range lines {
-		hasReplaced := false
-		t := scanner.Text()
-
-		// Iterate over the potential replacements for the line and check if there are
-		// any matches.
 		for _, replace := range f.Replace {
-			if !strings.HasPrefix(t, replace.Match) {
+			// If this line doesn't match what we expect for the replacement, move on to the next
+			// line. Otherwise, update the line to have the replacement value.
+			if !strings.HasPrefix(line, replace.Match) {
 				continue
 			}
 
-			hasReplaced = true
+			lines[i] = replace.ReplaceWith.String()
-			t = strings.Replace(t, replace.Match, replace.ReplaceWith.String(), 1)
-		}
-
-		// If there was a replacement that occurred on this specific line, do a write to the file
-		// immediately to write that modified content to the disk.
-		if hasReplaced {
-			if _, err := file.WriteAt([]byte(t), int64(len(scanner.Bytes()))); err != nil {
-				return err
-			}
 		}
 	}
 
-	if err := scanner.Err(); err != nil {
+	if err := ioutil.WriteFile(path, []byte(strings.Join(lines, "\n")), 0644); err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -426,15 +412,45 @@ func (f *ConfigurationFile) parseTextFile(path string) error {
 // Parses a properties file and updates the values within it to match those that
 // are passed. Writes the file once completed.
 func (f *ConfigurationFile) parsePropertiesFile(path string) error {
-	p, err := properties.LoadFile(path, properties.UTF8)
+	// Open the file.
+	f2, err := os.Open(path)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
+	var s strings.Builder
+
+	// Get any header comments from the file.
+	scanner := bufio.NewScanner(f2)
+	for scanner.Scan() {
+		text := scanner.Text()
+		if len(text) > 0 && text[0] != '#' {
+			break
+		}
+
+		s.WriteString(text)
+		s.WriteString("\n")
+	}
+
+	// Close the file.
+	_ = f2.Close()
+
+	// Handle any scanner errors.
+	if err := scanner.Err(); err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	// Decode the properties file.
+	p, err := properties.LoadFile(path, properties.UTF8)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	// Replace any values that need to be replaced.
 	for _, replace := range f.Replace {
 		data, err := f.LookupConfigurationValue(replace)
 		if err != nil {
-			return err
+			return errors.WithStackIf(err)
 		}
 
 		v, ok := p.Get(replace.Match)
@@ -446,27 +462,32 @@ func (f *ConfigurationFile) parsePropertiesFile(path string) error {
 		}
 
 		if _, _, err := p.Set(replace.Match, data); err != nil {
-			return err
+			return errors.WithStackIf(err)
 		}
 	}
 
+	// Add the new file content to the string builder.
+	for _, key := range p.Keys() {
+		value, ok := p.Get(key)
+		if !ok {
+			continue
+		}
+
+		s.WriteString(key)
+		s.WriteByte('=')
+		s.WriteString(strings.Trim(strconv.QuoteToASCII(value), `"`))
+		s.WriteString("\n")
+	}
+
+	// Open the file for writing.
 	w, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
 	if err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
+	defer w.Close()
 
-	var s string
+	// Write the data to the file.
-	// This is a copy of the properties.String() func except we don't plop spaces around
+	if _, err := w.Write([]byte(s.String())); err != nil {
-	// the key=value configurations since people like to complain about that.
-	// func (p *Properties) String() string
-	for _, key := range p.Keys() {
-		value, _ := p.Get(key)
-
-		s = fmt.Sprintf("%s%s=%s\n", s, key, value)
-	}
-
-	// Can't use the properties.Write() function since that doesn't apply our nicer formatting.
-	if _, err := w.Write([]byte(s)); err != nil {
 		return err
 	}
 

parser/value.go

@@ -21,4 +21,4 @@ func (cv *ReplaceValue) String() string {
 
 func (cv *ReplaceValue) Type() jsonparser.ValueType {
 	return cv.valueType
-}
+}

router/error.go

@@ -1,14 +1,16 @@
 package router
 
 import (
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/apex/log"
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/server"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"net/http"
 	"os"
+	"strings"
 )
 
 type RequestError struct {
@@ -33,7 +35,7 @@ func TrackedError(err error) *RequestError {
 // generated this server for the purposes of logging.
 func TrackedServerError(err error, s *server.Server) *RequestError {
 	return &RequestError{
-		Err:     errors.WithStack(err),
+		Err:     err,
 		Uuid:    uuid.Must(uuid.NewRandom()).String(),
 		Message: "",
 		server:  s,
@@ -60,7 +62,7 @@ func (e *RequestError) SetMessage(msg string) *RequestError {
 func (e *RequestError) AbortWithStatus(status int, c *gin.Context) {
 	// If this error is because the resource does not exist, we likely do not need to log
 	// the error anywhere, just return a 404 and move on with our lives.
-	if os.IsNotExist(e.Err) {
+	if errors.Is(e.Err, os.ErrNotExist) {
 		e.logger().WithField("error", e.Err).Debug("encountered os.IsNotExist error while handling request")
 
 		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
@@ -73,7 +75,7 @@ func (e *RequestError) AbortWithStatus(status int, c *gin.Context) {
 	if status >= 500 {
 		e.logger().WithField("error", e.Err).Error("encountered HTTP/500 error while handling request")
 
-		c.Error(errors.WithStack(e))
+		c.Error(errors.WithStackIf(e))
 	} else {
 		e.logger().WithField("error", e.Err).Debug("encountered non-HTTP/500 error while handling request")
 	}
@@ -95,6 +97,40 @@ func (e *RequestError) AbortWithServerError(c *gin.Context) {
 	e.AbortWithStatus(http.StatusInternalServerError, c)
 }
 
+// Handle specific filesystem errors for a server.
+func (e *RequestError) AbortFilesystemError(c *gin.Context) {
+	if errors.Is(e.Err, os.ErrNotExist) || filesystem.IsBadPathResolutionError(e.Err) {
+		if filesystem.IsBadPathResolutionError(e.Err) {
+			e.logger().Warn(e.Err.Error())
+		}
+
+		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{"error": "The requested resource was not found."})
+		return
+	}
+
+	if errors.Is(e.Err, filesystem.ErrNotEnoughDiskSpace) {
+		c.AbortWithStatusJSON(http.StatusConflict, gin.H{"error": "There is not enough disk space available to perform that action."})
+		return
+	}
+
+	if strings.HasSuffix(e.Err.Error(), "file name too long") {
+		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": "File name is too long."})
+		return
+	}
+
+	if e, ok := e.Err.(*os.SyscallError); ok && e.Syscall == "readdirent" {
+		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{"error": "The requested directory does not exist."})
+		return
+	}
+
+	if strings.HasSuffix(e.Err.Error(), "file name too long") {
+		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": "Cannot perform that action: file name is too long."})
+		return
+	}
+
+	e.AbortWithServerError(c)
+}
+
 // Format the error to a string and include the UUID.
 func (e *RequestError) Error() string {
 	return fmt.Sprintf("%v (uuid: %s)", e.Err, e.Uuid)

router/middleware.go

@@ -16,7 +16,7 @@ func SetAccessControlHeaders(c *gin.Context) {
 	o := c.GetHeader("Origin")
 	if o != config.Get().PanelLocation {
 		for _, origin := range config.Get().AllowedOrigins {
-			if o != origin {
+			if origin != "*" && o != origin {
 				continue
 			}
 

router/router.go

@@ -70,6 +70,7 @@ func Configure() *gin.Engine {
 		server.POST("/commands", postServerCommands)
 		server.POST("/install", postServerInstall)
 		server.POST("/reinstall", postServerReinstall)
+		server.POST("/ws/deny", postServerDenyWSTokens)
 
 		// This archive request causes the archive to start being created
 		// this should only be triggered by the panel.

router/router_download.go

@@ -2,6 +2,7 @@ package router
 
 import (
 	"bufio"
+	"errors"
 	"github.com/gin-gonic/gin"
 	"github.com/pterodactyl/wings/router/tokens"
 	"github.com/pterodactyl/wings/server/backup"
@@ -28,7 +29,7 @@ func getDownloadBackup(c *gin.Context) {
 
 	b, st, err := backup.LocateLocal(token.BackupUuid)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, os.ErrNotExist) {
 			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
 				"error": "The requested backup was not found on this server.",
 			})
@@ -69,7 +70,7 @@ func getDownloadFile(c *gin.Context) {
 		return
 	}
 
-	p, _ := s.Filesystem.SafePath(token.FilePath)
+	p, _ := s.Filesystem().SafePath(token.FilePath)
 	st, err := os.Stat(p)
 	// If there is an error or we're somehow trying to download a directory, just
 	// respond with the appropriate error.
@@ -94,4 +95,4 @@ func getDownloadFile(c *gin.Context) {
 	c.Header("Content-Type", "application/octet-stream")
 
 	bufio.NewReader(f).WriteTo(c.Writer)
-}
+}

router/router_server.go

@@ -3,31 +3,40 @@ package router
 import (
 	"bytes"
 	"context"
+	"emperror.dev/errors"
 	"github.com/apex/log"
 	"github.com/gin-gonic/gin"
-	"github.com/pkg/errors"
+	"github.com/pterodactyl/wings/router/tokens"
 	"github.com/pterodactyl/wings/server"
 	"net/http"
 	"os"
 	"strconv"
 )
 
+type serverProcData struct {
+	server.ResourceUsage
+	Suspended bool `json:"suspended"`
+}
+
 // Returns a single server from the collection of servers.
 func getServer(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	p := *s.Proc()
+	c.JSON(http.StatusOK, serverProcData{
-
+		ResourceUsage: *s.Proc(),
-	c.JSON(http.StatusOK, p)
+		Suspended:     s.IsSuspended(),
+	})
 }
 
 // Returns the logs for a given server instance.
 func getServerLogs(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	l, _ := strconv.ParseInt(c.DefaultQuery("size", "8192"), 10, 64)
+	l, _ := strconv.Atoi(c.DefaultQuery("size", "100"))
 	if l <= 0 {
-		l = 2048
+		l = 100
+	} else if l > 100 {
+		l = 100
 	}
 
 	out, err := s.ReadLogfile(l)
@@ -50,7 +59,7 @@ func getServerLogs(c *gin.Context) {
 func postServerPower(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	var data struct{
+	var data struct {
 		Action server.PowerAction `json:"action"`
 	}
 
@@ -78,7 +87,7 @@ func postServerPower(c *gin.Context) {
 		return
 	}
 
-	// Pass the actual heavy processing off to a seperate thread to handle so that
+	// Pass the actual heavy processing off to a separate thread to handle so that
 	// we can immediately return a response from the server. Some of these actions
 	// can take quite some time, especially stopping or restarting.
 	go func(s *server.Server) {
@@ -134,11 +143,13 @@ func patchServer(c *gin.Context) {
 	buf := bytes.Buffer{}
 	buf.ReadFrom(c.Request.Body)
 
-	if err := s.UpdateDataStructure(buf.Bytes(), true); err != nil {
+	if err := s.UpdateDataStructure(buf.Bytes()); err != nil {
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
+	s.SyncWithEnvironment()
+
 	c.Status(http.StatusNoContent)
 }
 
@@ -159,16 +170,23 @@ func postServerInstall(c *gin.Context) {
 func postServerReinstall(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	go func(serv *server.Server) {
+	if s.ExecutingPowerAction() {
-		if err := serv.Reinstall(); err != nil {
+		c.AbortWithStatusJSON(http.StatusConflict, gin.H{
-			serv.Log().WithField("error", err).Error("failed to complete server re-install process")
+			"error": "Cannot execute server reinstall event while another power action is running.",
+		})
+		return
+	}
+
+	go func(s *server.Server) {
+		if err := s.Reinstall(); err != nil {
+			s.Log().WithField("error", err).Error("failed to complete server re-install process")
 		}
 	}(s)
 
 	c.Status(http.StatusAccepted)
 }
 
-// Deletes a server from the wings daemon and deassociates its objects.
+// Deletes a server from the wings daemon and dissociate it's objects.
 func deleteServer(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
@@ -188,7 +206,9 @@ func deleteServer(c *gin.Context) {
 	}
 
 	// Unsubscribe all of the event listeners.
-	s.Events().UnsubscribeAll()
+	s.Events().Destroy()
+	s.Throttler().StopTimer()
+	s.Websockets().CancelAll()
 
 	// Destroy the environment; in Docker this will handle a running container and
 	// forcibly terminate it before removing the container, so we do not need to handle
@@ -206,11 +226,11 @@ func deleteServer(c *gin.Context) {
 	go func(p string) {
 		if err := os.RemoveAll(p); err != nil {
 			log.WithFields(log.Fields{
-				"path": p,
+				"path":  p,
-				"error": errors.WithStack(err),
+				"error": errors.WithStackIf(err),
 			}).Warn("failed to remove server files during deletion process")
 		}
-	}(s.Filesystem.Path())
+	}(s.Filesystem().Path())
 
 	var uuid = s.Id()
 	server.GetServers().Remove(func(s2 *server.Server) bool {
@@ -222,3 +242,20 @@ func deleteServer(c *gin.Context) {
 
 	c.Status(http.StatusNoContent)
 }
+
+// Adds any of the JTIs passed through in the body to the deny list for the websocket
+// preventing any JWT generated before the current time from being used to connect to
+// the socket or send along commands.
+func postServerDenyWSTokens(c *gin.Context) {
+	var data struct{ JTIs []string `json:"jtis"` }
+
+	if err := c.BindJSON(&data); err != nil {
+		return
+	}
+
+	for _, jti := range data.JTIs {
+		tokens.DenyJTI(jti)
+	}
+
+	c.Status(http.StatusNoContent)
+}

router/router_server_backup.go

@@ -7,6 +7,7 @@ import (
 	"github.com/pterodactyl/wings/server"
 	"github.com/pterodactyl/wings/server/backup"
 	"net/http"
+	"os"
 )
 
 // Backs up a server.
@@ -46,19 +47,34 @@ func postServerBackup(c *gin.Context) {
 	c.Status(http.StatusAccepted)
 }
 
-// Deletes a local backup of a server.
+// Deletes a local backup of a server. If the backup is not found on the machine just return
+// a 404 error. The service calling this endpoint can make its own decisions as to how it wants
+// to handle that response.
 func deleteServerBackup(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
 	b, _, err := backup.LocateLocal(c.Param("backup"))
 	if err != nil {
+		// Just return from the function at this point if the backup was not located.
+		if errors.Is(err, os.ErrNotExist) {
+			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
+				"error": "The requested backup was not found on this server.",
+			})
+			return
+		}
+
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
 	if err := b.Remove(); err != nil {
-		TrackedServerError(err, s).AbortWithServerError(c)
+		// I'm not entirely sure how likely this is to happen, however if we did manage to locate
-		return
+		// the backup previously and it is now missing when we go to delete, just treat it as having
+		// been successful, rather than returning a 404.
+		if !errors.Is(err, os.ErrNotExist) {
+			TrackedServerError(err, s).AbortWithServerError(c)
+			return
+		}
 	}
 
 	c.Status(http.StatusNoContent)

router/router_server_files.go

@@ -1,12 +1,12 @@
 package router
 
 import (
-	"bufio"
 	"context"
+	"emperror.dev/errors"
 	"github.com/gin-gonic/gin"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/router/tokens"
 	"github.com/pterodactyl/wings/server"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"golang.org/x/sync/errgroup"
 	"mime/multipart"
 	"net/http"
@@ -29,45 +29,26 @@ func getServerFileContents(c *gin.Context) {
 	}
 	p = "/" + strings.TrimLeft(p, "/")
 
-	cleaned, err := s.Filesystem.SafePath(p)
+	st, err := s.Filesystem().Stat(p)
 	if err != nil {
-		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
+		TrackedServerError(err, s).AbortFilesystemError(c)
-			"error": "The file requested could not be found.",
-		})
 		return
 	}
 
-	st, err := s.Filesystem.Stat(cleaned)
+	if err := s.Filesystem().Readfile(p, c.Writer); err != nil {
-	if err != nil {
+		TrackedServerError(err, s).AbortFilesystemError(c)
-		TrackedServerError(err, s).AbortWithServerError(c)
 		return
+	} else {
+		c.Header("X-Mime-Type", st.Mimetype)
+		c.Header("Content-Length", strconv.Itoa(int(st.Info.Size())))
+
+		// If a download parameter is included in the URL go ahead and attach the necessary headers
+		// so that the file can be downloaded.
+		if c.Query("download") != "" {
+			c.Header("Content-Disposition", "attachment; filename="+st.Info.Name())
+			c.Header("Content-Type", "application/octet-stream")
+		}
 	}
-
-	if st.Info.IsDir() {
-		c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
-			"error": "The requested resource was not found on the system.",
-		})
-		return
-	}
-
-	f, err := os.Open(cleaned)
-	if err != nil {
-		TrackedServerError(err, s).AbortWithServerError(c)
-		return
-	}
-	defer f.Close()
-
-	c.Header("X-Mime-Type", st.Mimetype)
-	c.Header("Content-Length", strconv.Itoa(int(st.Info.Size())))
-
-	// If a download parameter is included in the URL go ahead and attach the necessary headers
-	// so that the file can be downloaded.
-	if c.Query("download") != "" {
-		c.Header("Content-Disposition", "attachment; filename="+st.Info.Name())
-		c.Header("Content-Type", "application/octet-stream")
-	}
-
-	bufio.NewReader(f).WriteTo(c.Writer)
 }
 
 // Returns the contents of a directory for a server.
@@ -80,16 +61,9 @@ func getServerListDirectory(c *gin.Context) {
 		return
 	}
 
-	stats, err := s.Filesystem.ListDirectory(d)
+	stats, err := s.Filesystem().ListDirectory(d)
 	if err != nil {
-		if err.Error() == "readdirent: not a directory" {
+		TrackedServerError(err, s).AbortFilesystemError(c)
-			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
-				"error": "The requested directory does not exist.",
-			})
-			return
-		}
-
-		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
@@ -133,7 +107,7 @@ func putServerRenameFiles(c *gin.Context) {
 			case <-ctx.Done():
 				return ctx.Err()
 			default:
-				if err := s.Filesystem.Rename(pf, pt); err != nil {
+				if err := s.Filesystem().Rename(pf, pt); err != nil {
 					// Return nil if the error is an is not exists.
 					// NOTE: os.IsNotExist() does not work if the error is wrapped.
 					if errors.Is(err, os.ErrNotExist) {
@@ -149,7 +123,14 @@ func putServerRenameFiles(c *gin.Context) {
 	}
 
 	if err := g.Wait(); err != nil {
-		TrackedServerError(err, s).AbortWithServerError(c)
+		if errors.Is(err, os.ErrExist) {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "Cannot move or rename file, destination already exists.",
+			})
+			return
+		}
+
+		TrackedServerError(err, s).AbortFilesystemError(c)
 		return
 	}
 
@@ -168,15 +149,8 @@ func postServerCopyFile(c *gin.Context) {
 		return
 	}
 
-	if err := s.Filesystem.Copy(data.Location); err != nil {
+	if err := s.Filesystem().Copy(data.Location); err != nil {
-		// Check if the file does not exist.
+		TrackedServerError(err, s).AbortFilesystemError(c)
-		// NOTE: os.IsNotExist() does not work if the error is wrapped.
-		if errors.Is(err, os.ErrNotExist) {
-			c.Status(http.StatusNotFound)
-			return
-		}
-
-		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
@@ -215,7 +189,7 @@ func postServerDeleteFiles(c *gin.Context) {
 			case <-ctx.Done():
 				return ctx.Err()
 			default:
-				return s.Filesystem.Delete(pi)
+				return s.Filesystem().Delete(pi)
 			}
 		})
 	}
@@ -239,8 +213,15 @@ func postServerWriteFile(c *gin.Context) {
 	}
 	f = "/" + strings.TrimLeft(f, "/")
 
-	if err := s.Filesystem.Writefile(f, c.Request.Body); err != nil {
+	if err := s.Filesystem().Writefile(f, c.Request.Body); err != nil {
-		TrackedServerError(err, s).AbortWithServerError(c)
+		if errors.Is(err, filesystem.ErrIsDirectory) {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "Cannot write file, name conflicts with an existing directory by the same name.",
+			})
+			return
+		}
+
+		TrackedServerError(err, s).AbortFilesystemError(c)
 		return
 	}
 
@@ -260,7 +241,14 @@ func postServerCreateDirectory(c *gin.Context) {
 		return
 	}
 
-	if err := s.Filesystem.CreateDirectory(data.Name, data.Path); err != nil {
+	if err := s.Filesystem().CreateDirectory(data.Name, data.Path); err != nil {
+		if err.Error() == "not a directory" {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "Part of the path being created is not a directory (ENOTDIR).",
+			})
+			return
+		}
+
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
@@ -287,20 +275,20 @@ func postServerCompressFiles(c *gin.Context) {
 		return
 	}
 
-	if !s.Filesystem.HasSpaceAvailable() {
+	if !s.Filesystem().HasSpaceAvailable(true) {
 		c.AbortWithStatusJSON(http.StatusConflict, gin.H{
 			"error": "This server does not have enough available disk space to generate a compressed archive.",
 		})
 		return
 	}
 
-	f, err := s.Filesystem.CompressFiles(data.RootPath, data.Files)
+	f, err := s.Filesystem().CompressFiles(data.RootPath, data.Files)
 	if err != nil {
-		TrackedServerError(err, s).AbortWithServerError(c)
+		TrackedServerError(err, s).AbortFilesystemError(c)
 		return
 	}
 
-	c.JSON(http.StatusOK, &server.Stat{
+	c.JSON(http.StatusOK, &filesystem.Stat{
 		Info:     f,
 		Mimetype: "application/tar+gzip",
 	})
@@ -318,8 +306,18 @@ func postServerDecompressFiles(c *gin.Context) {
 		return
 	}
 
-	hasSpace, err := s.Filesystem.SpaceAvailableForDecompression(data.RootPath, data.File)
+	hasSpace, err := s.Filesystem().SpaceAvailableForDecompression(data.RootPath, data.File)
 	if err != nil {
+		// Handle an unknown format error.
+		if errors.Is(err, filesystem.ErrUnknownArchiveFormat) {
+			s.Log().WithField("error", err).Warn("failed to decompress file due to unknown format")
+
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "unknown archive format",
+			})
+			return
+		}
+
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
@@ -331,15 +329,27 @@ func postServerDecompressFiles(c *gin.Context) {
 		return
 	}
 
-	if err := s.Filesystem.DecompressFile(data.RootPath, data.File); err != nil {
+	if err := s.Filesystem().DecompressFile(data.RootPath, data.File); err != nil {
-		// Check if the file does not exist.
-		// NOTE: os.IsNotExist() does not work if the error is wrapped.
 		if errors.Is(err, os.ErrNotExist) {
-			c.Status(http.StatusNotFound)
+			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
+				"error": "The requested archive was not found.",
+			})
 			return
 		}
 
-		TrackedServerError(err, s).AbortWithServerError(c)
+		// If the file is busy for some reason just return a nicer error to the user since there is not
+		// much we specifically can do. They'll need to stop the running server process in order to overwrite
+		// a file like this.
+		if strings.Contains(err.Error(), "text file busy") {
+			s.Log().WithField("error", err).Warn("failed to decompress file due to busy text file")
+
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "One or more files this archive is attempting to overwrite are currently in use by another process. Please try again.",
+			})
+			return
+		}
+
+		TrackedServerError(err, s).AbortFilesystemError(c)
 		return
 	}
 
@@ -361,42 +371,40 @@ func postServerUploadFiles(c *gin.Context) {
 		return
 	}
 
-	if !s.Filesystem.HasSpaceAvailable() {
-		c.AbortWithStatusJSON(http.StatusConflict, gin.H{
-			"error": "This server does not have enough available disk space to accept any file uploads.",
-		})
-		return
-	}
-
 	form, err := c.MultipartForm()
 	if err != nil {
 		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
-			"error": "Failed to get multipart form.",
+			"error": "Failed to get multipart form data from request.",
 		})
 		return
 	}
 
 	headers, ok := form.File["files"]
 	if !ok {
-		c.AbortWithStatusJSON(http.StatusNotModified, gin.H{
+		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
-			"error": "No files were attached to the request.",
+			"error": "No files were found on the request body.",
 		})
 		return
 	}
 
 	directory := c.Query("directory")
 
+	var totalSize int64
 	for _, header := range headers {
-		p, err := s.Filesystem.SafePath(filepath.Join(directory, header.Filename))
+		totalSize += header.Size
+	}
+
+	for _, header := range headers {
+		p, err := s.Filesystem().SafePath(filepath.Join(directory, header.Filename))
 		if err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
+			TrackedServerError(err, s).AbortFilesystemError(c)
 			return
 		}
 
 		// We run this in a different method so I can use defer without any of
 		// the consequences caused by calling it in a loop.
 		if err := handleFileUpload(p, s, header); err != nil {
-			c.AbortWithError(http.StatusInternalServerError, err)
+			TrackedServerError(err, s).AbortFilesystemError(c)
 			return
 		}
 	}
@@ -405,12 +413,12 @@ func postServerUploadFiles(c *gin.Context) {
 func handleFileUpload(p string, s *server.Server, header *multipart.FileHeader) error {
 	file, err := header.Open()
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 	defer file.Close()
 
-	if err := s.Filesystem.Writefile(p, file); err != nil {
+	if err := s.Filesystem().Writefile(p, file); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil

router/router_server_ws.go

@@ -6,6 +6,7 @@ import (
 	"github.com/gin-gonic/gin"
 	ws "github.com/gorilla/websocket"
 	"github.com/pterodactyl/wings/router/websocket"
+	"time"
 )
 
 // Upgrades a connection to a websocket and passes events along between.
@@ -23,6 +24,28 @@ func getServerWebsocket(c *gin.Context) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
+	// Track this open connection on the server so that we can close them all programtically
+	// if the server is deleted.
+	s.Websockets().Push(handler.Uuid(), &cancel)
+	defer s.Websockets().Remove(handler.Uuid())
+
+	// Listen for the context being canceled and then close the websocket connection. This normally
+	// just happens because you're disconnecting from the socket in the browser, however in some
+	// cases we close the connections programatically (e.g. deleting the server) and need to send
+	// a close message to the websocket so it disconnects.
+	go func(ctx context.Context, c *ws.Conn) {
+	ListenerLoop:
+		for {
+			select {
+			case <-ctx.Done():
+				handler.Connection.WriteControl(ws.CloseMessage, ws.FormatCloseMessage(ws.CloseGoingAway, "server deleted"), time.Now().Add(time.Second*5))
+				// A break right here without defining the specific loop would only break the select
+				// and not actually break the for loop, thus causing this routine to stick around forever.
+				break ListenerLoop
+			}
+		}
+	}(ctx, handler.Connection)
+
 	go handler.ListenForServerEvents(ctx)
 	go handler.ListenForExpiration(ctx)
 

router/router_system.go

@@ -57,7 +57,11 @@ func postCreateServer(c *gin.Context) {
 	// cycle. If there are any errors they will be logged and communicated back
 	// to the Panel where a reinstall may take place.
 	go func(i *installer.Installer) {
-		i.Execute()
+		err := i.Server().CreateEnvironment()
+		if err != nil {
+			i.Server().Log().WithField("error", err).Error("failed to create server environment during install process")
+			return
+		}
 
 		if err := i.Server().Install(false); err != nil {
 			log.WithFields(log.Fields{"server": i.Uuid(), "error": err}).Error("failed to run install process for server")
@@ -71,7 +75,7 @@ func postCreateServer(c *gin.Context) {
 func postUpdateConfiguration(c *gin.Context) {
 	// A backup of the configuration for error purposes.
 	ccopy := *config.Get()
-	// A copy of the configuration we're using to bind the data recevied into.
+	// A copy of the configuration we're using to bind the data received into.
 	cfg := *config.Get()
 
 	// BindJSON sends 400 if the request fails, all we need to do is return

router/router_transfer.go

@@ -4,8 +4,9 @@ import (
 	"bufio"
 	"bytes"
 	"crypto/sha256"
+	"emperror.dev/errors"
 	"encoding/hex"
-	"errors"
+	"github.com/apex/log"
 	"github.com/buger/jsonparser"
 	"github.com/gin-gonic/gin"
 	"github.com/mholt/archiver/v3"
@@ -14,7 +15,6 @@ import (
 	"github.com/pterodactyl/wings/installer"
 	"github.com/pterodactyl/wings/router/tokens"
 	"github.com/pterodactyl/wings/server"
-	"go.uber.org/zap"
 	"io"
 	"io/ioutil"
 	"net/http"
@@ -22,7 +22,6 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
-	"time"
 )
 
 func getServerArchive(c *gin.Context) {
@@ -53,7 +52,7 @@ func getServerArchive(c *gin.Context) {
 
 	st, err := s.Archiver.Stat()
 	if err != nil {
-		if !os.IsNotExist(err) {
+		if !errors.Is(err, os.ErrNotExist) {
 			TrackedServerError(err, s).SetMessage("failed to stat archive").AbortWithServerError(c)
 			return
 		}
@@ -68,7 +67,7 @@ func getServerArchive(c *gin.Context) {
 		return
 	}
 
-	file, err := os.Open(s.Archiver.ArchivePath())
+	file, err := os.Open(s.Archiver.Path())
 	if err != nil {
 		tserr := TrackedServerError(err, s)
 		if !os.IsNotExist(err) {
@@ -85,7 +84,7 @@ func getServerArchive(c *gin.Context) {
 	c.Header("X-Checksum", checksum)
 	c.Header("X-Mime-Type", st.Mimetype)
 	c.Header("Content-Length", strconv.Itoa(int(st.Info.Size())))
-	c.Header("Content-Disposition", "attachment; filename="+s.Archiver.ArchiveName())
+	c.Header("Content-Disposition", "attachment; filename="+s.Archiver.Name())
 	c.Header("Content-Type", "application/octet-stream")
 
 	bufio.NewReader(file).WriteTo(c.Writer)
@@ -94,45 +93,34 @@ func getServerArchive(c *gin.Context) {
 func postServerArchive(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	go func(server *server.Server) {
+	go func(s *server.Server) {
-		start := time.Now()
+		if err := s.Archiver.Archive(); err != nil {
-
+			s.Log().WithField("error", err).Error("failed to get archive for server")
-		if err := server.Archiver.Archive(); err != nil {
-			zap.S().Errorw("failed to get archive for server", zap.String("server", server.Id()), zap.Error(err))
 			return
 		}
 
-		zap.S().Debugw(
+		s.Log().Debug("successfully created server archive, notifying panel")
-			"successfully created archive for server",
-			zap.String("server", server.Id()),
-			zap.Duration("time", time.Now().Sub(start).Round(time.Microsecond)),
-		)
 
-		r := api.NewRequester()
+		r := api.New()
-		rerr, err := r.SendArchiveStatus(server.Id(), true)
+		err := r.SendArchiveStatus(s.Id(), true)
-		if rerr != nil || err != nil {
+		if err != nil {
-			if err != nil {
+			if !api.IsRequestError(err) {
-				zap.S().Errorw("failed to notify panel with archive status", zap.String("server", server.Id()), zap.Error(err))
+				s.Log().WithField("error", err).Error("failed to notify panel of archive status")
 				return
 			}
 
-			zap.S().Errorw(
+			s.Log().WithField("error", err.Error()).Error("panel returned an error when sending the archive status")
-				"panel returned an error when sending the archive status",
+
-				zap.String("server", server.Id()),
-				zap.Error(errors.New(rerr.String())),
-			)
 			return
 		}
 
-		zap.S().Debugw("successfully notified panel about archive status", zap.String("server", server.Id()))
+		s.Log().Debug("successfully notified panel of archive status")
 	}(s)
 
 	c.Status(http.StatusAccepted)
 }
 
 func postTransfer(c *gin.Context) {
-	zap.S().Debug("incoming transfer from panel")
-
 	buf := bytes.Buffer{}
 	buf.ReadFrom(c.Request.Body)
 
@@ -141,6 +129,7 @@ func postTransfer(c *gin.Context) {
 		url, _ := jsonparser.GetString(data, "url")
 		token, _ := jsonparser.GetString(data, "token")
 
+		l := log.WithField("server", serverID)
 		// Create an http client with no timeout.
 		client := &http.Client{Timeout: 0}
 
@@ -150,25 +139,25 @@ func postTransfer(c *gin.Context) {
 				return
 			}
 
-			zap.S().Errorw("server transfer has failed", zap.String("server", serverID))
+			l.Info("server transfer failed, notifying panel")
-			rerr, err := api.NewRequester().SendTransferFailure(serverID)
+			err := api.New().SendTransferFailure(serverID)
-			if rerr != nil || err != nil {
+			if err != nil {
-				if err != nil {
+				if !api.IsRequestError(err) {
-					zap.S().Errorw("failed to notify panel with transfer failure", zap.String("server", serverID), zap.Error(err))
+					l.WithField("error", err).Error("failed to notify panel with transfer failure")
 					return
 				}
 
-				zap.S().Errorw("panel returned an error when notifying of a transfer failure", zap.String("server", serverID), zap.Error(errors.New(rerr.String())))
+				l.WithField("error", err.Error()).Error("received error response from panel while notifying of transfer failure")
 				return
 			}
 
-			zap.S().Debugw("successfully notified panel about transfer failure", zap.String("server", serverID))
+			l.Debug("notified panel of transfer failure")
 		}()
 
 		// Make a new GET request to the URL the panel gave us.
 		req, err := http.NewRequest("GET", url, nil)
 		if err != nil {
-			zap.S().Errorw("failed to create http request", zap.Error(err))
+			log.WithField("error", errors.WithStackIf(err)).Error("failed to create http request for archive transfer")
 			return
 		}
 
@@ -178,36 +167,39 @@ func postTransfer(c *gin.Context) {
 		// Execute the http request.
 		res, err := client.Do(req)
 		if err != nil {
-			zap.S().Errorw("failed to send http request", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to send archive http request")
 			return
 		}
 		defer res.Body.Close()
 
 		// Handle non-200 status codes.
 		if res.StatusCode != 200 {
-			body, err := ioutil.ReadAll(res.Body)
+			_, err := ioutil.ReadAll(res.Body)
 			if err != nil {
-				zap.S().Errorw("failed to read response body", zap.Int("status", res.StatusCode), zap.Error(err))
+				l.WithField("error", errors.WithStackIf(err)).WithField("status", res.StatusCode).Error("failed read transfer response body")
+
 				return
 			}
 
-			zap.S().Errorw("failed to request server archive", zap.Int("status", res.StatusCode), zap.String("body", string(body)))
+			l.WithField("error", errors.WithStackIf(err)).WithField("status", res.StatusCode).Error("failed to request server archive")
+
 			return
 		}
 
 		// Get the path to the archive.
-		archivePath := filepath.Join(config.Get().System.ArchiveDirectory, serverID + ".tar.gz")
+		archivePath := filepath.Join(config.Get().System.ArchiveDirectory, serverID+".tar.gz")
 
 		// Check if the archive already exists and delete it if it does.
 		_, err = os.Stat(archivePath)
 		if err != nil {
 			if !os.IsNotExist(err) {
-				zap.S().Errorw("failed to stat file", zap.Error(err))
+				l.WithField("error", errors.WithStackIf(err)).Error("failed to stat archive file")
 				return
 			}
 		} else {
 			if err := os.Remove(archivePath); err != nil {
-				zap.S().Errorw("failed to delete old file", zap.Error(err))
+				l.WithField("error", errors.WithStackIf(err)).Warn("failed to remove old archive file")
+
 				return
 			}
 		}
@@ -215,65 +207,69 @@ func postTransfer(c *gin.Context) {
 		// Create the file.
 		file, err := os.Create(archivePath)
 		if err != nil {
-			zap.S().Errorw("failed to open file on disk", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to open archive on disk")
+
 			return
 		}
 
 		// Copy the file.
-		buf := make([]byte, 1024 * 4)
+		buf := make([]byte, 1024*4)
 		_, err = io.CopyBuffer(file, res.Body, buf)
 		if err != nil {
-			zap.S().Errorw("failed to copy file to disk", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to copy archive file to disk")
+
 			return
 		}
 
 		// Close the file so it can be opened to verify the checksum.
 		if err := file.Close(); err != nil {
-			zap.S().Errorw("failed to close archive file", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to close archive file")
+
 			return
 		}
-		zap.S().Debug("server archive has been downloaded, computing checksum..", zap.String("server", serverID))
+
+		l.WithField("server", serverID).Debug("server archive downloaded, computing checksum...")
 
 		// Open the archive file for computing a checksum.
 		file, err = os.Open(archivePath)
 		if err != nil {
-			zap.S().Errorw("failed to open file on disk", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to open archive on disk")
 			return
 		}
 
 		// Compute the sha256 checksum of the file.
 		hash := sha256.New()
-		buf = make([]byte, 1024 * 4)
+		buf = make([]byte, 1024*4)
 		if _, err := io.CopyBuffer(hash, file, buf); err != nil {
-			zap.S().Errorw("failed to copy file for checksum verification", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to copy archive file for checksum verification")
 			return
 		}
 
 		// Verify the two checksums.
 		if hex.EncodeToString(hash.Sum(nil)) != res.Header.Get("X-Checksum") {
-			zap.S().Errorw("checksum failed verification")
+			l.Error("checksum verification failed for archive")
 			return
 		}
 
 		// Close the file.
 		if err := file.Close(); err != nil {
-			zap.S().Errorw("failed to close archive file", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to close archive file after calculating checksum")
 			return
 		}
 
-		zap.S().Infow("server archive transfer was successful", zap.String("server", serverID))
+		l.Info("server archive transfer was successful")
 
 		// Get the server data from the request.
 		serverData, t, _, _ := jsonparser.Get(data, "server")
 		if t != jsonparser.Object {
-			zap.S().Errorw("invalid server data passed in request")
+			l.Error("invalid server data passed in request")
 			return
 		}
 
 		// Create a new server installer (note this does not execute the install script)
 		i, err := installer.New(serverData)
 		if err != nil {
-			zap.S().Warnw("failed to validate the received server data", zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to validate received server data")
 			return
 		}
 
@@ -281,11 +277,14 @@ func postTransfer(c *gin.Context) {
 		server.GetServers().Add(i.Server())
 
 		// Create the server's environment (note this does not execute the install script)
-		i.Execute()
+		if err := i.Server().CreateEnvironment(); err != nil {
+			l.WithField("error", err).Error("failed to create server environment")
+			return
+		}
 
 		// Un-archive the archive. That sounds weird..
-		if err := archiver.NewTarGz().Unarchive(archivePath, i.Server().Filesystem.Path()); err != nil {
+		if err := archiver.NewTarGz().Unarchive(archivePath, i.Server().Filesystem().Path()); err != nil {
-			zap.S().Errorw("failed to extract archive", zap.String("server", serverID), zap.Error(err))
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to extract server archive")
 			return
 		}
 
@@ -297,18 +296,19 @@ func postTransfer(c *gin.Context) {
 		hasError = false
 
 		// Notify the panel that the transfer succeeded.
-		rerr, err := api.NewRequester().SendTransferSuccess(serverID)
+		err = api.New().SendTransferSuccess(serverID)
-		if rerr != nil || err != nil {
+		if err != nil {
-			if err != nil {
+			if !api.IsRequestError(err) {
-				zap.S().Errorw("failed to notify panel with transfer success", zap.String("server", serverID), zap.Error(err))
+				l.WithField("error", errors.WithStackIf(err)).Error("failed to notify panel of transfer success")
 				return
 			}
 
-			zap.S().Errorw("panel returned an error when notifying of a transfer success", zap.String("server", serverID), zap.Error(errors.New(rerr.String())))
+			l.WithField("error", err.Error()).Error("panel responded with error after transfer success")
+
 			return
 		}
 
-		zap.S().Debugw("successfully notified panel about transfer success", zap.String("server", serverID))
+		l.Info("successfully notified panel of transfer success")
 	}(buf.Bytes())
 
 	c.Status(http.StatusAccepted)

router/tokens/websocket.go

@@ -2,11 +2,40 @@ package tokens
 
 import (
 	"encoding/json"
+	"github.com/apex/log"
 	"github.com/gbrlsnchs/jwt/v3"
 	"strings"
 	"sync"
+	"time"
 )
 
+// The time at which Wings was booted. No JWT's created before this time are allowed to
+// connect to the socket since they may have been marked as denied already and therefore
+// could be invalid at this point.
+//
+// By doing this we make it so that a user who gets disconnected from Wings due to a Wings
+// reboot just needs to request a new token as if their old token had expired naturally.
+var wingsBootTime = time.Now()
+
+// A map that contains any JTI's that have been denied by the Panel and the time at which
+// they were marked as denied. Therefore any JWT with the same JTI and an IssuedTime that
+// is the same as or before this time should be considered invalid.
+//
+// This is used to allow the Panel to revoke tokens en-masse for a given user & server
+// combination since the JTI for tokens is just MD5(user.id + server.uuid). When a server
+// is booted this listing is fetched from the panel and the Websocket is dynamically updated.
+var denylist sync.Map
+
+// Adds a JTI to the denylist by marking any JWTs generated before the current time as
+// being invalid if they use the same JTI.
+func DenyJTI(jti string) {
+	log.WithField("jti", jti).Debugf("adding \"%s\" to JTI denylist", jti)
+
+	denylist.Store(jti, time.Now())
+}
+
+// A JWT payload for Websocket connections. This JWT is passed along to the Websocket after
+// it has been connected to by sending an "auth" event.
 type WebsocketPayload struct {
 	jwt.Payload
 	sync.RWMutex
@@ -24,6 +53,7 @@ func (p *WebsocketPayload) GetPayload() *jwt.Payload {
 	return &p.Payload
 }
 
+// Returns the UUID of the server associated with this JWT.
 func (p *WebsocketPayload) GetServerUuid() string {
 	p.RLock()
 	defer p.RUnlock()
@@ -31,6 +61,33 @@ func (p *WebsocketPayload) GetServerUuid() string {
 	return p.ServerUUID
 }
 
+// Check if the JWT has been marked as denied by the instance due to either being issued
+// before Wings was booted, or because we have denied all tokens with the same JTI
+// occurring before a set time.
+func (p *WebsocketPayload) Denylisted() bool {
+	// If there is no IssuedAt present for the token, we cannot validate the token so
+	// just immediately mark it as not valid.
+	if p.IssuedAt == nil {
+		return true
+	}
+
+	// If the time that the token was issued is before the time at which Wings was booted
+	// then the token is invalid for our purposes, even if the token "has permission".
+	if p.IssuedAt.Time.Before(wingsBootTime) {
+		return true
+	}
+
+	// Finally, if the token was issued before a time that is currently denied for this
+	// token instance, ignore the permissions response.
+	if t, ok := denylist.Load(p.JWTID); ok {
+		if p.IssuedAt.Time.Before(t.(time.Time)) {
+			return true
+		}
+	}
+
+	return false
+}
+
 // Checks if the given token payload has a permission string.
 func (p *WebsocketPayload) HasPermission(permission string) bool {
 	p.RLock()
@@ -38,7 +95,7 @@ func (p *WebsocketPayload) HasPermission(permission string) bool {
 
 	for _, k := range p.Permissions {
 		if k == permission || (!strings.HasPrefix(permission, "admin") && k == "*") {
-			return true
+			return !p.Denylisted()
 		}
 	}
 

router/websocket/listeners.go

@@ -28,7 +28,7 @@ func (h *Handler) ListenForExpiration(ctx context.Context) {
 			if jwt != nil {
 				if jwt.ExpirationTime.Unix()-time.Now().Unix() <= 0 {
 					_ = h.SendJson(&Message{Event: TokenExpiredEvent})
-				} else if jwt.ExpirationTime.Unix()-time.Now().Unix() <= 180 {
+				} else if jwt.ExpirationTime.Unix()-time.Now().Unix() <= 60 {
 					_ = h.SendJson(&Message{Event: TokenExpiringEvent})
 				}
 			}
@@ -36,38 +36,40 @@ func (h *Handler) ListenForExpiration(ctx context.Context) {
 	}
 }
 
+var e = []string{
+	server.StatsEvent,
+	server.StatusEvent,
+	server.ConsoleOutputEvent,
+	server.InstallOutputEvent,
+	server.InstallStartedEvent,
+	server.InstallCompletedEvent,
+	server.DaemonMessageEvent,
+	server.BackupCompletedEvent,
+}
+
 // Listens for different events happening on a server and sends them along
 // to the connected websocket.
 func (h *Handler) ListenForServerEvents(ctx context.Context) {
-	e := []string{
+	h.server.Log().Debug("listening for server events over websocket")
-		server.StatsEvent,
+	callback := func(e events.Event) {
-		server.StatusEvent,
+		if err := h.SendJson(&Message{Event: e.Topic, Args: []string{e.Data}}); err != nil {
-		server.ConsoleOutputEvent,
+			h.server.Log().WithField("error", err).Warn("error while sending server data over websocket")
-		server.InstallOutputEvent,
-		server.InstallStartedEvent,
-		server.InstallCompletedEvent,
-		server.DaemonMessageEvent,
-		server.BackupCompletedEvent,
-	}
-
-	eventChannel := make(chan events.Event)
-	for _, event := range e {
-		h.server.Events().Subscribe(event, eventChannel)
-	}
-
-	for d := range eventChannel {
-		select {
-		case <-ctx.Done():
-			for _, event := range e {
-				h.server.Events().Unsubscribe(event, eventChannel)
-			}
-
-			close(eventChannel)
-		default:
-			_ = h.SendJson(&Message{
-				Event: d.Topic,
-				Args:  []string{d.Data},
-			})
 		}
 	}
+
+	// Subscribe to all of the events with the same callback that will push the data out over the
+	// websocket for the server.
+	for _, evt := range e {
+		h.server.Events().On(evt, &callback)
+	}
+
+	go func(ctx context.Context) {
+		select {
+		case <-ctx.Done():
+			// Once this context is stopped, de-register all of the listeners that have been registered.
+			for _, evt := range e {
+				h.server.Events().Off(evt, &callback)
+			}
+		}
+	}(ctx)
 }

router/websocket/message.go

@@ -8,16 +8,13 @@ const (
 	SetStateEvent              = "set state"
 	SendServerLogsEvent        = "send logs"
 	SendCommandEvent           = "send command"
+	SendStatsEvent             = "send stats"
 	ErrorEvent                 = "daemon error"
+	JwtErrorEvent              = "jwt error"
 )
 
 type Message struct {
-	// The event to perform. Should be one of the following that are supported:
+	// The event to perform.
-	//
-	// - status : Returns the server's power state.
-	// - logs : Returns the server log data at the time of the request.
-	// - power : Performs a power action aganist the server based the data.
-	// - command : Performs a command on a server using the data field.
 	Event string `json:"event"`
 
 	// The data to pass along, only used by power/command currently. Other requests

router/websocket/websocket.go

@@ -2,15 +2,16 @@ package websocket
 
 import (
 	"context"
+	"emperror.dev/errors"
 	"encoding/json"
 	"fmt"
 	"github.com/apex/log"
 	"github.com/gbrlsnchs/jwt/v3"
 	"github.com/google/uuid"
 	"github.com/gorilla/websocket"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
+	"github.com/pterodactyl/wings/environment/docker"
 	"github.com/pterodactyl/wings/router/tokens"
 	"github.com/pterodactyl/wings/server"
 	"net/http"
@@ -32,9 +33,26 @@ const (
 
 type Handler struct {
 	sync.RWMutex
+
 	Connection *websocket.Conn
 	jwt        *tokens.WebsocketPayload `json:"-"`
 	server     *server.Server
+	uuid       uuid.UUID
+}
+
+var (
+	ErrJwtNotPresent    = errors.Sentinel("jwt: no jwt present")
+	ErrJwtNoConnectPerm = errors.Sentinel("jwt: missing connect permission")
+	ErrJwtUuidMismatch  = errors.Sentinel("jwt: server uuid mismatch")
+	ErrJwtOnDenylist    = errors.Sentinel("jwt: created too far in past (denylist)")
+)
+
+func IsJwtError(err error) bool {
+	return errors.Is(err, ErrJwtNotPresent) ||
+		errors.Is(err, ErrJwtNoConnectPerm) ||
+		errors.Is(err, ErrJwtUuidMismatch) ||
+		errors.Is(err, ErrJwtOnDenylist) ||
+		errors.Is(err, jwt.ErrExpValidation)
 }
 
 // Parses a JWT into a websocket token payload.
@@ -45,8 +63,12 @@ func NewTokenPayload(token []byte) (*tokens.WebsocketPayload, error) {
 		return nil, err
 	}
 
+	if payload.Denylisted() {
+		return nil, ErrJwtOnDenylist
+	}
+
 	if !payload.HasPermission(PermissionConnect) {
-		return nil, errors.New("not authorized to connect to this socket")
+		return nil, ErrJwtNoConnectPerm
 	}
 
 	return &payload, nil
@@ -64,6 +86,10 @@ func GetHandler(s *server.Server, w http.ResponseWriter, r *http.Request) (*Hand
 			}
 
 			for _, origin := range config.Get().AllowedOrigins {
+				if origin == "*" {
+					return true
+				}
+
 				if o != origin {
 					continue
 				}
@@ -80,17 +106,31 @@ func GetHandler(s *server.Server, w http.ResponseWriter, r *http.Request) (*Hand
 		return nil, err
 	}
 
+	u, err := uuid.NewRandom()
+	if err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+
 	return &Handler{
 		Connection: conn,
 		jwt:        nil,
 		server:     s,
+		uuid:       u,
 	}, nil
 }
 
+func (h *Handler) Uuid() uuid.UUID {
+	return h.uuid
+}
+
 func (h *Handler) SendJson(v *Message) error {
-	// Do not send JSON down the line if the JWT on the connection is not
+	// Do not send JSON down the line if the JWT on the connection is not valid!
-	// valid!
 	if err := h.TokenValid(); err != nil {
+		h.unsafeSendJson(Message{
+			Event: JwtErrorEvent,
+			Args:  []string{err.Error()},
+		})
+
 		return nil
 	}
 
@@ -113,7 +153,23 @@ func (h *Handler) SendJson(v *Message) error {
 		}
 	}
 
-	return h.unsafeSendJson(v)
+	if err := h.unsafeSendJson(v); err != nil {
+		// Not entirely sure how this happens (likely just when there is a ton of console spam)
+		// but I don't care to fix it right now, so just mask the error and throw a warning into
+		// the logs for us to look into later.
+		if errors.Is(err, websocket.ErrCloseSent) {
+			if h.server != nil {
+				h.server.Log().WithField("subsystem", "websocket").
+					WithField("event", v.Event).
+					Warn("failed to send event to websocket: close already sent")
+			}
+			return nil
+		}
+
+		return err
+	}
+
+	return nil
 }
 
 // Sends JSON over the websocket connection, ignoring the authentication state of the
@@ -130,19 +186,23 @@ func (h *Handler) unsafeSendJson(v interface{}) error {
 func (h *Handler) TokenValid() error {
 	j := h.GetJwt()
 	if j == nil {
-		return errors.New("no jwt present")
+		return ErrJwtNotPresent
 	}
 
 	if err := jwt.ExpirationTimeValidator(time.Now())(&j.Payload); err != nil {
 		return err
 	}
 
+	if j.Denylisted() {
+		return ErrJwtOnDenylist
+	}
+
 	if !j.HasPermission(PermissionConnect) {
-		return errors.New("jwt does not have connect permission")
+		return ErrJwtNoConnectPerm
 	}
 
 	if h.server.Id() != j.GetServerUuid() {
-		return errors.New("jwt server uuid mismatch")
+		return ErrJwtUuidMismatch
 	}
 
 	return nil
@@ -153,22 +213,23 @@ func (h *Handler) TokenValid() error {
 // error message, otherwise we just send back a standard error message.
 func (h *Handler) SendErrorJson(msg Message, err error, shouldLog ...bool) error {
 	j := h.GetJwt()
+	isJWTError := IsJwtError(err)
 
-	message := "an unexpected error was encountered while handling this request"
+	wsm := Message{
-	if server.IsSuspendedError(err) || (j != nil && j.HasPermission(PermissionReceiveErrors)) {
+		Event: ErrorEvent,
-		message = err.Error()
+		Args:  []string{"an unexpected error was encountered while handling this request"},
+	}
+	if isJWTError || (j != nil && j.HasPermission(PermissionReceiveErrors)) {
+		wsm.Event = JwtErrorEvent
+		wsm.Args = []string{err.Error()}
 	}
 
-	m, u := h.GetErrorMessage(message)
+	m, u := h.GetErrorMessage(wsm.Args[0])
-
-	wsm := Message{Event: ErrorEvent}
 	wsm.Args = []string{m}
 
-	if len(shouldLog) == 0 || (len(shouldLog) == 1 && shouldLog[0] == true) {
+	if !isJWTError && (len(shouldLog) == 0 || (len(shouldLog) == 1 && shouldLog[0] == true)) {
-		if !server.IsSuspendedError(err) {
+		h.server.Log().WithFields(log.Fields{"event": msg.Event, "error_identifier": u.String(), "error": err}).
-			h.server.Log().WithFields(log.Fields{"event": msg.Event, "error_identifier": u.String(), "error": err}).
+			Error("failed to handle websocket process; an error was encountered processing an event")
-				Error("failed to handle websocket process; an error was encountered processing an event")
-		}
 	}
 
 	return h.unsafeSendJson(wsm)
@@ -202,11 +263,9 @@ func (h *Handler) GetJwt() *tokens.WebsocketPayload {
 func (h *Handler) HandleInbound(m Message) error {
 	if m.Event != AuthenticationEvent {
 		if err := h.TokenValid(); err != nil {
-			log.WithField("message", err.Error()).Debug("jwt for server websocket is no longer valid")
-
 			h.unsafeSendJson(Message{
-				Event: ErrorEvent,
+				Event: JwtErrorEvent,
-				Args:  []string{"could not authenticate client: " + err.Error()},
+				Args:  []string{err.Error()},
 			})
 
 			return nil
@@ -261,7 +320,7 @@ func (h *Handler) HandleInbound(m Message) error {
 			// Only send the current disk usage if the server is offline, if docker container is running,
 			// Environment#EnableResourcePolling() will send this data to all clients.
 			if state == environment.ProcessOfflineState {
-				_ = h.server.Filesystem.HasSpaceAvailable()
+				_ = h.server.Filesystem().HasSpaceAvailable(false)
 
 				b, _ := json.Marshal(h.server.Proc())
 				h.SendJson(&Message{
@@ -309,7 +368,7 @@ func (h *Handler) HandleInbound(m Message) error {
 				return nil
 			}
 
-			logs, err := h.server.Environment.Readlog(1024 * 16)
+			logs, err := h.server.Environment.Readlog(config.Get().System.WebsocketLogCount)
 			if err != nil {
 				return err
 			}
@@ -321,6 +380,16 @@ func (h *Handler) HandleInbound(m Message) error {
 				})
 			}
 
+			return nil
+		}
+	case SendStatsEvent:
+		{
+			b, _ := json.Marshal(h.server.Proc())
+			h.SendJson(&Message{
+				Event: server.StatsEvent,
+				Args:  []string{string(b)},
+			})
+
 			return nil
 		}
 	case SendCommandEvent:
@@ -333,6 +402,18 @@ func (h *Handler) HandleInbound(m Message) error {
 				return nil
 			}
 
+			// TODO(dane): should probably add a new process state that is "booting environment" or something
+			//  so that we can better handle this and only set the environment to booted once we're attached.
+			//
+			//  Or maybe just an IsBooted function?
+			if h.server.GetState() == environment.ProcessStartingState {
+				if e, ok := h.server.Environment.(*docker.Environment); ok {
+					if !e.IsAttached() {
+						return nil
+					}
+				}
+			}
+
 			return h.server.Environment.SendCommand(strings.Join(m.Args, ""))
 		}
 	}

server/archiver.go

@@ -2,9 +2,11 @@ package server
 
 import (
 	"crypto/sha256"
+	"emperror.dev/errors"
 	"encoding/hex"
 	"github.com/mholt/archiver/v3"
 	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"io"
 	"io/ioutil"
 	"os"
@@ -16,19 +18,19 @@ type Archiver struct {
 	Server *Server
 }
 
-// ArchivePath returns the path to the server's archive.
+// Path returns the path to the server's archive.
-func (a *Archiver) ArchivePath() string {
+func (a *Archiver) Path() string {
-	return filepath.Join(config.Get().System.ArchiveDirectory, a.ArchiveName())
+	return filepath.Join(config.Get().System.ArchiveDirectory, a.Name())
 }
 
-// ArchiveName returns the name of the server's archive.
+// Name returns the name of the server's archive.
-func (a *Archiver) ArchiveName() string {
+func (a *Archiver) Name() string {
 	return a.Server.Id() + ".tar.gz"
 }
 
 // Exists returns a boolean based off if the archive exists.
 func (a *Archiver) Exists() bool {
-	if _, err := os.Stat(a.ArchivePath()); os.IsNotExist(err) {
+	if _, err := os.Stat(a.Path()); os.IsNotExist(err) {
 		return false
 	}
 
@@ -36,67 +38,73 @@ func (a *Archiver) Exists() bool {
 }
 
 // Stat stats the archive file.
-func (a *Archiver) Stat() (*Stat, error) {
+func (a *Archiver) Stat() (*filesystem.Stat, error) {
-	return a.Server.Filesystem.unsafeStat(a.ArchivePath())
+	s, err := os.Stat(a.Path())
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return &filesystem.Stat{
+		Info:     s,
+		Mimetype: "application/tar+gzip",
+	}, nil
 }
 
 // Archive creates an archive of the server and deletes the previous one.
 func (a *Archiver) Archive() error {
-	path := a.Server.Filesystem.Path()
+	path := a.Server.Filesystem().Path()
 
 	// Get the list of root files and directories to archive.
 	var files []string
 	fileInfo, err := ioutil.ReadDir(path)
 	if err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 
 	for _, file := range fileInfo {
-		f, err := a.Server.Filesystem.SafeJoin(path, file)
+		f := filepath.Join(path, file.Name())
-		if err != nil {
+		// If the file is a symlink we cannot safely assume that the result of a filepath.Join() will be
-			return err
+		// a safe destination. We need to check if the file is a symlink, and if so pass off to the SafePath
+		// function to resolve it to the final destination.
+		//
+		// ioutil.ReadDir() calls Lstat, so this will work correctly. If it did not call Lstat, but rather
+		// just did a normal Stat call, this would fail since that would be looking at the symlink destination
+		// and not the actual file in this listing.
+		if file.Mode()&os.ModeSymlink != 0 {
+			f, err = a.Server.Filesystem().SafePath(filepath.Join(path, file.Name()))
+			if err != nil {
+				return err
+			}
 		}
 
 		files = append(files, f)
 	}
 
-	stat, err := a.Stat()
+	if err := a.DeleteIfExists(); err != nil {
-	if err != nil && !os.IsNotExist(err) {
 		return err
 	}
 
-	// Check if the file exists.
+	return archiver.NewTarGz().Archive(files, a.Path())
-	if stat != nil {
-		if err := os.Remove(a.ArchivePath()); err != nil {
-			return err
-		}
-	}
-
-	return archiver.NewTarGz().Archive(files, a.ArchivePath())
 }
 
 // DeleteIfExists deletes the archive if it exists.
 func (a *Archiver) DeleteIfExists() error {
-	stat, err := a.Stat()
+	if _, err := a.Stat(); err != nil {
-	if err != nil && !os.IsNotExist(err) {
+		if errors.Is(err, os.ErrNotExist) {
-		return err
+			return nil
-	}
-
-	// Check if the file exists.
-	if stat != nil {
-		if err := os.Remove(a.ArchivePath()); err != nil {
-			return err
 		}
+
+		return errors.WithStackIf(err)
 	}
 
-	return nil
+	return errors.WrapIf(os.Remove(a.Path()), "archiver: failed to delete archive from system")
 }
 
 // Checksum computes a SHA256 checksum of the server's archive.
 func (a *Archiver) Checksum() (string, error) {
-	file, err := os.Open(a.ArchivePath())
+	file, err := os.Open(a.Path())
 	if err != nil {
-		return "", err
+		return "", errors.WithStack(err)
 	}
 	defer file.Close()
 
@@ -104,7 +112,7 @@ func (a *Archiver) Checksum() (string, error) {
 
 	buf := make([]byte, 1024*4)
 	if _, err := io.CopyBuffer(hash, file, buf); err != nil {
-		return "", err
+		return "", errors.WithStack(err)
 	}
 
 	return hex.EncodeToString(hash.Sum(nil)), nil

server/backup.go

@@ -2,8 +2,8 @@ package server
 
 import (
 	"bufio"
+	"emperror.dev/errors"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/server/backup"
 	"os"
@@ -13,21 +13,18 @@ import (
 // Notifies the panel of a backup's state and returns an error if one is encountered
 // while performing this action.
 func (s *Server) notifyPanelOfBackup(uuid string, ad *backup.ArchiveDetails, successful bool) error {
-	r := api.NewRequester()
+	err := api.New().SendBackupStatus(uuid, ad.ToRequest(successful))
-	rerr, err := r.SendBackupStatus(uuid, ad.ToRequest(successful))
+	if err != nil {
-	if rerr != nil || err != nil {
+		if !api.IsRequestError(err) {
-		if err != nil {
 			s.Log().WithFields(log.Fields{
 				"backup": uuid,
 				"error":  err,
-			}).Error("failed to notify panel of backup status due to internal code error")
+			}).Error("failed to notify panel of backup status due to wings error")
 
-			return err
+			return errors.WithStackIf(err)
 		}
 
-		s.Log().WithField("backup", uuid).Warn(rerr.String())
+		return errors.New(err.Error())
-
-		return errors.New(rerr.String())
 	}
 
 	return nil
@@ -37,10 +34,10 @@ func (s *Server) notifyPanelOfBackup(uuid string, ad *backup.ArchiveDetails, suc
 func (s *Server) getServerwideIgnoredFiles() ([]string, error) {
 	var ignored []string
 
-	f, err := os.Open(path.Join(s.Filesystem.Path(), ".pteroignore"))
+	f, err := os.Open(path.Join(s.Filesystem().Path(), ".pteroignore"))
 	if err != nil {
 		if !os.IsNotExist(err) {
-			return nil, err
+			return nil, errors.WithStack(err)
 		}
 	} else {
 		scanner := bufio.NewScanner(f)
@@ -52,7 +49,7 @@ func (s *Server) getServerwideIgnoredFiles() ([]string, error) {
 		}
 
 		if err := scanner.Err(); err != nil {
-			return nil, err
+			return nil, errors.WithStack(err)
 		}
 	}
 
@@ -72,7 +69,7 @@ func (s *Server) GetIncludedBackupFiles(ignored []string) (*backup.IncludedFiles
 	}
 
 	// Get the included files based on the root path and the ignored files provided.
-	return s.Filesystem.GetIncludedFiles(s.Filesystem.Path(), ignored)
+	return s.Filesystem().GetIncludedFiles(s.Filesystem().Path(), ignored)
 }
 
 // Performs a server backup and then emits the event over the server websocket. We
@@ -82,15 +79,15 @@ func (s *Server) Backup(b backup.BackupInterface) error {
 	// Get the included files based on the root path and the ignored files provided.
 	inc, err := s.GetIncludedBackupFiles(b.Ignored())
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
-	ad, err := b.Generate(inc, s.Filesystem.Path())
+	ad, err := b.Generate(inc, s.Filesystem().Path())
 	if err != nil {
 		if notifyError := s.notifyPanelOfBackup(b.Identifier(), &backup.ArchiveDetails{}, false); notifyError != nil {
 			s.Log().WithFields(log.Fields{
 				"backup": b.Identifier(),
-				"error":  err,
+				"error":  notifyError,
 			}).Warn("failed to notify panel of failed backup state")
 		}
 
@@ -102,7 +99,7 @@ func (s *Server) Backup(b backup.BackupInterface) error {
 			"file_size":     0,
 		})
 
-		return errors.WithStack(err)
+		return errors.WrapIf(err, "backup: error while generating server backup")
 	}
 
 	// Try to notify the panel about the status of this backup. If for some reason this request
@@ -110,7 +107,7 @@ func (s *Server) Backup(b backup.BackupInterface) error {
 	if notifyError := s.notifyPanelOfBackup(b.Identifier(), ad, true); notifyError != nil {
 		b.Remove()
 
-		return notifyError
+		return errors.WithStackIf(err)
 	}
 
 	// Emit an event over the socket so we can update the backup in realtime on

server/backup/archiver.go

@@ -3,9 +3,9 @@ package backup
 import (
 	"archive/tar"
 	"context"
+	"emperror.dev/errors"
 	"github.com/apex/log"
 	gzip "github.com/klauspost/pgzip"
-	"github.com/pkg/errors"
 	"github.com/remeh/sizedwaitgroup"
 	"golang.org/x/sync/errgroup"
 	"io"
@@ -23,10 +23,10 @@ type Archive struct {
 }
 
 // Creates an archive at dst with all of the files defined in the included files struct.
-func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
+func (a *Archive) Create(dst string, ctx context.Context) error {
 	f, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
 	if err != nil {
-		return nil, err
+		return errors.WithStackIf(err)
 	}
 	defer f.Close()
 
@@ -36,7 +36,7 @@ func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
 	}
 
 	gzw, _ := gzip.NewWriterLevel(f, gzip.BestSpeed)
-	_ = gzw.SetConcurrency(1 << 20, maxCpu)
+	_ = gzw.SetConcurrency(1<<20, maxCpu)
 
 	defer gzw.Flush()
 	defer gzw.Close()
@@ -58,7 +58,7 @@ func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
 
 			select {
 			case <-ctx.Done():
-				return ctx.Err()
+				return errors.WithStackIf(ctx.Err())
 			default:
 				return a.addToArchive(p, tw)
 			}
@@ -75,28 +75,34 @@ func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
 			log.WithField("location", dst).Warn("failed to delete corrupted backup archive")
 		}
 
-		return nil, err
+		return errors.WithStackIf(err)
 	}
 
-	st, err := f.Stat()
+	return nil
-	if err != nil {
-		return nil, err
-	}
-
-	return st, nil
 }
 
 // Adds a single file to the existing tar archive writer.
 func (a *Archive) addToArchive(p string, w *tar.Writer) error {
 	f, err := os.Open(p)
 	if err != nil {
-		return err
+		// If you try to backup something that no longer exists (got deleted somewhere during the process
+		// but not by this process), just skip over it and don't kill the entire backup.
+		if os.IsNotExist(err) {
+			return nil
+		}
+
+		return errors.WithStackIf(err)
 	}
 	defer f.Close()
 
 	s, err := f.Stat()
 	if err != nil {
-		return errors.WithStack(err)
+		// Same as above, don't kill the process just because the file no longer exists.
+		if os.IsNotExist(err) {
+			return nil
+		}
+
+		return errors.WithStackIf(err)
 	}
 
 	header := &tar.Header{
@@ -114,12 +120,12 @@ func (a *Archive) addToArchive(p string, w *tar.Writer) error {
 	defer a.Unlock()
 
 	if err := w.WriteHeader(header); err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	buf := make([]byte, 4*1024)
 	if _, err := io.CopyBuffer(w, f, buf); err != nil {
-		return err
+		return errors.WithStackIf(err)
 	}
 
 	return nil

server/backup/backup.go

@@ -2,9 +2,9 @@ package backup
 
 import (
 	"crypto/sha1"
+	"emperror.dev/errors"
 	"encoding/hex"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/config"
 	"io"
@@ -87,7 +87,7 @@ func (b *Backup) Path() string {
 func (b *Backup) Size() (int64, error) {
 	st, err := os.Stat(b.Path())
 	if err != nil {
-		return 0, errors.WithStack(err)
+		return 0, errors.WithStackIf(err)
 	}
 
 	return st.Size(), nil
@@ -99,7 +99,7 @@ func (b *Backup) Checksum() ([]byte, error) {
 
 	f, err := os.Open(b.Path())
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 	defer f.Close()
 

server/backup/backup_local.go

@@ -2,7 +2,7 @@ package backup
 
 import (
 	"context"
-	"github.com/pkg/errors"
+	"emperror.dev/errors"
 	"os"
 )
 
@@ -24,11 +24,11 @@ func LocateLocal(uuid string) (*LocalBackup, os.FileInfo, error) {
 
 	st, err := os.Stat(b.Path())
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, errors.WithStackIf(err)
 	}
 
 	if st.IsDir() {
-		return nil, nil, errors.New("invalid archive found; is directory")
+		return nil, nil, errors.New("invalid archive, is directory")
 	}
 
 	return b, st, nil
@@ -47,8 +47,8 @@ func (b *LocalBackup) Generate(included *IncludedFiles, prefix string) (*Archive
 		Files:      included,
 	}
 
-	if _, err := a.Create(b.Path(), context.Background()); err != nil {
+	if err := a.Create(b.Path(), context.Background()); err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
 	}
 
 	return b.Details(), nil

server/backup/backup_request.go

@@ -1,15 +1,14 @@
 package backup
 
 import (
+	"emperror.dev/errors"
 	"fmt"
-	"github.com/pkg/errors"
 )
 
 type Request struct {
 	Adapter      string   `json:"adapter"`
 	Uuid         string   `json:"uuid"`
 	IgnoredFiles []string `json:"ignored_files"`
-	PresignedUrl string   `json:"presigned_url"`
 }
 
 // Generates a new local backup struct.
@@ -32,15 +31,10 @@ func (r *Request) NewS3Backup() (*S3Backup, error) {
 		return nil, errors.New(fmt.Sprintf("cannot create s3 backup using [%s] adapter", r.Adapter))
 	}
 
-	if len(r.PresignedUrl) == 0 {
-		return nil, errors.New("a valid presigned S3 upload URL must be provided to use the [s3] adapter")
-	}
-
 	return &S3Backup{
 		Backup: Backup{
 			Uuid:         r.Uuid,
 			IgnoredFiles: r.IgnoredFiles,
 		},
-		PresignedUrl: r.PresignedUrl,
 	}, nil
 }

server/backup/backup_s3.go

@@ -1,23 +1,21 @@
 package backup
 
 import (
+	"bytes"
 	"context"
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/apex/log"
+	"github.com/pterodactyl/wings/api"
 	"io"
 	"net/http"
 	"os"
 	"strconv"
+	"time"
 )
 
 type S3Backup struct {
 	Backup
-
-	// The pre-signed upload endpoint for the generated backup. This must be
-	// provided otherwise this request will fail. This allows us to keep all
-	// of the keys off the daemon instances and the panel can handle generating
-	// the credentials for us.
-	PresignedUrl string
 }
 
 var _ BackupInterface = (*S3Backup)(nil)
@@ -32,24 +30,18 @@ func (s *S3Backup) Generate(included *IncludedFiles, prefix string) (*ArchiveDet
 		Files:      included,
 	}
 
-	if _, err := a.Create(s.Path(), context.Background()); err != nil {
+	if err := a.Create(s.Path(), context.Background()); err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
 	}
 
 	rc, err := os.Open(s.Path())
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
 	}
 	defer rc.Close()
 
-	if resp, err := s.generateRemoteRequest(rc); err != nil {
+	if err := s.generateRemoteRequest(rc); err != nil {
-		return nil, err
+		return nil, errors.WithStackIf(err)
-	} else {
-		resp.Body.Close()
-
-		if resp.StatusCode != http.StatusOK {
-			return nil, fmt.Errorf("failed to put S3 object, %d:%s", resp.StatusCode, resp.Status)
-		}
 	}
 
 	return s.Details(), err
@@ -60,27 +52,144 @@ func (s *S3Backup) Remove() error {
 	return os.Remove(s.Path())
 }
 
-// Generates the remote S3 request and begins the upload.
+// Reader provides a wrapper around an existing io.Reader
-func (s *S3Backup) generateRemoteRequest(rc io.ReadCloser) (*http.Response, error) {
+// but implements io.Closer in order to satisfy an io.ReadCloser.
-	r, err := http.NewRequest(http.MethodPut, s.PresignedUrl, nil)
+type Reader struct {
-	if err != nil {
+	io.Reader
-		return nil, err
+}
-	}
+
-
+func (Reader) Close() error {
-	if sz, err := s.Size(); err != nil {
+	return nil
-		return nil, err
+}
-	} else {
+
-		r.ContentLength = sz
+// Generates the remote S3 request and begins the upload.
-		r.Header.Add("Content-Length", strconv.Itoa(int(sz)))
+func (s *S3Backup) generateRemoteRequest(rc io.ReadCloser) error {
-		r.Header.Add("Content-Type", "application/x-gzip")
+	defer rc.Close()
-	}
+
-
+	size, err := s.Backup.Size()
-	r.Body = rc
+	if err != nil {
-	
+		return err
-	log.WithFields(log.Fields{
+	}
-		"endpoint": s.PresignedUrl,
+
-		"headers": r.Header,
+	urls, err := api.New().GetBackupRemoteUploadURLs(s.Backup.Uuid, size)
-	}).Debug("uploading backup to remote S3 endpoint")
+	if err != nil {
-
+		return err
-	return http.DefaultClient.Do(r)
+	}
+
+	log.WithFields(log.Fields{
+		"backup_id": s.Uuid,
+		"adapter":   "s3",
+	}).Info("attempting to upload backup..")
+
+	handlePart := func(part string, size int64) (string, error) {
+		r, err := http.NewRequest(http.MethodPut, part, nil)
+		if err != nil {
+			return "", err
+		}
+
+		r.ContentLength = size
+		r.Header.Add("Content-Length", strconv.Itoa(int(size)))
+		r.Header.Add("Content-Type", "application/x-gzip")
+
+		// Limit the reader to the size of the part.
+		r.Body = Reader{io.LimitReader(rc, size)}
+
+		// This http request can block forever due to it not having a timeout,
+		// but we are uploading up to 5GB of data, so there is not really
+		// a good way to handle a timeout on this.
+		res, err := http.DefaultClient.Do(r)
+		if err != nil {
+			return "", err
+		}
+		defer res.Body.Close()
+
+		// Handle non-200 status codes.
+		if res.StatusCode != http.StatusOK {
+			return "", fmt.Errorf("failed to put S3 object part, %d:%s", res.StatusCode, res.Status)
+		}
+
+		// Get the ETag from the uploaded part, this should be sent with the CompleteMultipartUpload request.
+		return res.Header.Get("ETag"), nil
+	}
+
+	// Start assembling the body that will be sent as apart of the CompleteMultipartUpload request.
+	var completeUploadBody bytes.Buffer
+	completeUploadBody.WriteString("<CompleteMultipartUpload>\n")
+
+	partCount := len(urls.Parts)
+	for i, part := range urls.Parts {
+		// Get the size for the current part.
+		var partSize int64
+		if i+1 < partCount {
+			partSize = urls.PartSize
+		} else {
+			// This is the remaining size for the last part,
+			// there is not a minimum size limit for the last part.
+			partSize = size - (int64(i) * urls.PartSize)
+		}
+
+		// Attempt to upload the part.
+		etag, err := handlePart(part, partSize)
+		if err != nil {
+			log.WithError(err).Warn("failed to upload part")
+
+			// Send an AbortMultipartUpload request.
+			if err := s.finishUpload(urls.AbortMultipartUpload, nil); err != nil {
+				log.WithError(err).Warn("failed to abort multipart backup upload")
+			}
+
+			return err
+		}
+
+		// Add the part to the CompleteMultipartUpload body.
+		completeUploadBody.WriteString("\t<Part>\n")
+		completeUploadBody.WriteString("\t\t<ETag>\"" + etag + "\"</ETag>\n")
+		completeUploadBody.WriteString("\t\t<PartNumber>" + strconv.Itoa(i+1) + "</PartNumber>\n")
+		completeUploadBody.WriteString("\t</Part>\n")
+	}
+	completeUploadBody.WriteString("</CompleteMultipartUpload>")
+
+	// Send a CompleteMultipartUpload request.
+	if err := s.finishUpload(urls.CompleteMultipartUpload, &completeUploadBody); err != nil {
+		return err
+	}
+
+	log.WithFields(log.Fields{
+		"backup_id": s.Uuid,
+		"adapter":   "s3",
+	}).Info("backup has been successfully uploaded")
+	return nil
+}
+
+// finishUpload sends a requests to the specified url to either complete or abort the upload.
+func (s *S3Backup) finishUpload(url string, body io.Reader) error {
+	r, err := http.NewRequest(http.MethodPost, url, body)
+	if err != nil {
+		return err
+	}
+
+	// Create a new http client with a 10 second timeout.
+	c := &http.Client{
+		Timeout: 10 * time.Second,
+	}
+
+	res, err := c.Do(r)
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+
+	// Handle non-200 status codes.
+	if res.StatusCode != http.StatusOK {
+		// If no body was sent, we were aborting the upload.
+		if body == nil {
+			return fmt.Errorf("failed to abort S3 multipart upload, %d:%s", res.StatusCode, res.Status)
+		}
+
+		// If a body was sent we were completing the upload.
+		// TODO: Attempt to send abort request?
+		return fmt.Errorf("failed to complete S3 multipart upload, %d:%s", res.StatusCode, res.Status)
+	}
+
+	return nil
 }

server/config_parser.go

@@ -15,7 +15,7 @@ func (s *Server) UpdateConfigurationFiles() {
 		f := cf
 
 		pool.Submit(func() {
-			p, err := s.Filesystem.SafePath(f.FileName)
+			p, err := s.Filesystem().SafePath(f.FileName)
 			if err != nil {
 				s.Log().WithField("error", err).Error("failed to generate safe path for configuration file")
 
@@ -29,4 +29,4 @@ func (s *Server) UpdateConfigurationFiles() {
 	}
 
 	pool.StopWait()
-}
+}

server/configuration.go

@@ -20,6 +20,10 @@ type Configuration struct {
 	// The command that should be used when booting up the server instance.
 	Invocation string `json:"invocation"`
 
+	// By default this is false, however if selected within the Panel while installing or re-installing a
+	// server, specific installation scripts will be skipped for the server process.
+	SkipEggScripts bool `default:"false" json:"skip_egg_scripts"`
+
 	// An array of environment variables that should be passed along to the running
 	// server process.
 	EnvVars environment.Variables `json:"environment"`
@@ -43,6 +47,21 @@ func (s *Server) Config() *Configuration {
 	return &s.cfg
 }
 
+// Returns the amount of disk space available to a server in bytes.
+func (s *Server) DiskSpace() int64 {
+	s.cfg.mu.RLock()
+	defer s.cfg.mu.RUnlock()
+
+	return s.cfg.Build.DiskSpace * 1024.0 * 1024.0
+}
+
+func (s *Server) MemoryLimit() int64 {
+	s.cfg.mu.RLock()
+	defer s.cfg.mu.RUnlock()
+
+	return s.cfg.Build.MemoryLimit
+}
+
 func (c *Configuration) GetUuid() string {
 	c.mu.RLock()
 	defer c.mu.RUnlock()

server/console.go

@@ -1,60 +1,111 @@
 package server
 
 import (
+	"context"
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/mitchellh/colorstring"
 	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/system"
 	"sync"
 	"sync/atomic"
 	"time"
 )
 
+var ErrTooMuchConsoleData = errors.Sentinel("console is outputting too much data")
+
 type ConsoleThrottler struct {
-	sync.RWMutex
+	mu sync.Mutex
 	config.ConsoleThrottles
 
 	// The total number of activations that have occurred thus far.
 	activations uint64
 
+	// The total number of lines that have been sent since the last reset timer period.
+	count uint64
+
+	// Wether or not the console output is being throttled. It is up to calling code to
+	// determine what to do if it is.
+	isThrottled system.AtomicBool
+
 	// The total number of lines processed so far during the given time period.
-	lines uint64
+	timerCancel *context.CancelFunc
-
-	lastIntervalTime *time.Time
-	lastDecayTime    *time.Time
 }
 
-// Increments the number of activations for a server.
+// Resets the state of the throttler.
-func (ct *ConsoleThrottler) AddActivation() uint64 {
+func (ct *ConsoleThrottler) Reset() {
-	ct.Lock()
+	atomic.StoreUint64(&ct.count, 0)
-	defer ct.Unlock()
+	atomic.StoreUint64(&ct.activations, 0)
-
+	ct.isThrottled.Set(false)
-	ct.activations += 1
-
-	return ct.activations
 }
 
-// Decrements the number of activations for a server.
+// Triggers an activation for a server. You can also decrement the number of activations
-func (ct *ConsoleThrottler) RemoveActivation() uint64 {
+// by passing a negative number.
-	ct.Lock()
+func (ct *ConsoleThrottler) markActivation(increment bool) uint64 {
-	defer ct.Unlock()
+	if !increment {
+		if atomic.LoadUint64(&ct.activations) == 0 {
+			return 0
+		}
 
-	if ct.activations == 0 {
+		// This weird dohicky subtracts 1 from the activation count.
-		return 0
+		return atomic.AddUint64(&ct.activations, ^uint64(0))
 	}
 
-	ct.activations -= 1
+	return atomic.AddUint64(&ct.activations, 1)
-
-	return ct.activations
 }
 
-// Increment the total count of lines that we have processed so far.
+// Determines if the console is currently being throttled. Calls to this function can be used to
-func (ct *ConsoleThrottler) IncrementLineCount() uint64 {
+// determine if output should be funneled along to the websocket processes.
-	return atomic.AddUint64(&ct.lines, 1)
+func (ct *ConsoleThrottler) Throttled() bool {
+	return ct.isThrottled.Get()
 }
 
-// Reset the line count to zero.
+// Starts a timer that runs in a seperate thread and will continually decrement the lines processed
-func (ct *ConsoleThrottler) ResetLineCount() {
+// and number of activations, regardless of the current console message volume.
-	atomic.SwapUint64(&ct.lines, 0)
+func (ct *ConsoleThrottler) StartTimer() {
+	ctx, cancel := context.WithCancel(context.Background())
+
+	reset := time.NewTicker(time.Duration(int64(ct.LineResetInterval)) * time.Millisecond)
+	decay := time.NewTicker(time.Duration(int64(ct.DecayInterval)) * time.Millisecond)
+
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				reset.Stop()
+				return
+			case <-reset.C:
+				ct.isThrottled.Set(false)
+				atomic.StoreUint64(&ct.count, 0)
+			}
+		}
+	}()
+
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				decay.Stop()
+				return
+			case <-decay.C:
+				ct.markActivation(false)
+			}
+		}
+	}()
+
+	ct.timerCancel = &cancel
+}
+
+// Stops a running timer processes if one exists. This is only called when the server is deleted since
+// we want this to always be running. If there is no process currently running nothing will really happen.
+func (ct *ConsoleThrottler) StopTimer() {
+	ct.mu.Lock()
+	defer ct.mu.Unlock()
+	if ct.timerCancel != nil {
+		c := *ct.timerCancel
+		c()
+		ct.timerCancel = nil
+	}
 }
 
 // Handles output from a server's console. This code ensures that a server is not outputting
@@ -70,32 +121,42 @@ func (ct *ConsoleThrottler) ResetLineCount() {
 // data all at once. These values are all configurable via the wings configuration file, however the
 // defaults have been in the wild for almost two years at the time of this writing, so I feel quite
 // confident in them.
-func (ct *ConsoleThrottler) Handle() {
+//
+// This function returns an error if the server should be stopped due to violating throttle constraints
+// and a boolean value indicating if a throttle is being violated when it is checked.
+func (ct *ConsoleThrottler) Increment(onTrigger func()) error {
+	if !ct.Enabled {
+		return nil
+	}
 
+	// Increment the line count and if we have now output more lines than are allowed, trigger a throttle
+	// activation. Once the throttle is triggered and has passed the kill at value we will trigger a server
+	// stop automatically.
+	if atomic.AddUint64(&ct.count, 1) >= ct.Lines && !ct.Throttled() {
+		ct.isThrottled.Set(true)
+		if ct.markActivation(true) >= ct.MaximumTriggerCount {
+			return ErrTooMuchConsoleData
+		}
+
+		onTrigger()
+	}
+
+	return nil
 }
 
 // Returns the throttler instance for the server or creates a new one.
 func (s *Server) Throttler() *ConsoleThrottler {
-	s.throttleLock.RLock()
+	s.throttleLock.Lock()
+	defer s.throttleLock.Unlock()
 
 	if s.throttler == nil {
-		// Release the read lock so that we can acquire a normal lock on the process and
-		// make modifications to the throttler.
-		s.throttleLock.RUnlock()
-
-		s.throttleLock.Lock()
 		s.throttler = &ConsoleThrottler{
 			ConsoleThrottles: config.Get().Throttles,
 		}
-		s.throttleLock.Unlock()
-
-		return s.throttler
-	} else {
-		defer s.throttleLock.RUnlock()
-		return s.throttler
 	}
-}
 
+	return s.throttler
+}
 
 // Sends output to the server console formatted to appear correctly as being sent
 // from Wings.

server/crash.go

@@ -1,8 +1,8 @@
 package server
 
 import (
+	"emperror.dev/errors"
 	"fmt"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"sync"
@@ -35,7 +35,7 @@ func (cd *CrashHandler) SetLastCrash(t time.Time) {
 // if it was the result of an event that we should try to recover from.
 //
 // This function assumes it is called under circumstances where a crash is suspected
-// of occuring. It will not do anything to determine if it was actually a crash, just
+// of occurring. It will not do anything to determine if it was actually a crash, just
 // look at the exit state and check if it meets the criteria of being called a crash
 // by Wings.
 //
@@ -57,7 +57,7 @@ func (s *Server) handleServerCrash() error {
 
 	exitCode, oomKilled, err := s.Environment.ExitState()
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// If the system is not configured to detect a clean exit code as a crash, and the
@@ -75,7 +75,7 @@ func (s *Server) handleServerCrash() error {
 	c := s.crasher.LastCrashTime()
 	// If the last crash time was within the last 60 seconds we do not want to perform
 	// an automatic reboot of the process. Return an error that can be handled.
-	if !c.IsZero() && c.Add(time.Second * 60).After(time.Now()) {
+	if !c.IsZero() && c.Add(time.Second*60).After(time.Now()) {
 		s.PublishConsoleOutputFromDaemon("Aborting automatic reboot: last crash occurred less than 60 seconds ago.")
 
 		return &crashTooFrequent{}
@@ -84,4 +84,4 @@ func (s *Server) handleServerCrash() error {
 	s.crasher.SetLastCrash(time.Now())
 
 	return s.HandlePowerAction(PowerActionStart)
-}
+}

server/errors.go

@@ -1,17 +1,9 @@
 package server
 
-type suspendedError struct {
+import "emperror.dev/errors"
-}
 
-func (e *suspendedError) Error() string {
+var ErrIsRunning = errors.Sentinel("server is running")
-	return "server is currently in a suspended state"
+var ErrSuspended = errors.Sentinel("server is currently in a suspended state")
-}
-
-func IsSuspendedError(err error) bool {
-	_, ok := err.(*suspendedError)
-
-	return ok
-}
 
 type crashTooFrequent struct {
 }
@@ -37,4 +29,4 @@ func IsServerDoesNotExistError(err error) bool {
 	_, ok := err.(*serverDoesNotExist)
 
 	return ok
-}
+}

server/filesystem.go

@@ -1,883 +1,30 @@
 package server
 
 import (
-	"bytes"
+	"emperror.dev/errors"
-	"context"
+	"github.com/pterodactyl/wings/server/filesystem"
-	"encoding/json"
-	"fmt"
-	"github.com/gabriel-vasile/mimetype"
-	"github.com/karrick/godirwalk"
-	"github.com/pkg/errors"
-	"github.com/pterodactyl/wings/config"
-	"github.com/pterodactyl/wings/server/backup"
-	ignore "github.com/sabhiram/go-gitignore"
-	"golang.org/x/sync/errgroup"
-	"io"
-	"io/ioutil"
 	"os"
-	"path"
-	"path/filepath"
-	"sort"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"syscall"
-	"time"
 )
 
-// Error returned when there is a bad path provided to one of the FS calls.
+func (s *Server) Filesystem() *filesystem.Filesystem {
-type PathResolutionError struct{}
+	return s.fs
-
-// Returns the error response in a string form that can be more easily consumed.
-func (pre PathResolutionError) Error() string {
-	return "invalid path resolution"
-}
-
-func IsPathResolutionError(err error) bool {
-	_, ok := err.(PathResolutionError)
-
-	return ok
-}
-
-type Filesystem struct {
-	mu sync.RWMutex
-
-	lastLookupTime time.Time
-	diskUsage      int64
-
-	Server *Server
-}
-
-// Returns the root path that contains all of a server's data.
-func (fs *Filesystem) Path() string {
-	return filepath.Join(config.Get().System.Data, fs.Server.Id())
-}
-
-// Normalizes a directory being passed in to ensure the user is not able to escape
-// from their data directory. After normalization if the directory is still within their home
-// path it is returned. If they managed to "escape" an error will be returned.
-//
-// This logic is actually copied over from the SFTP server code. Ideally that eventually
-// either gets ported into this application, or is able to make use of this package.
-func (fs *Filesystem) SafePath(p string) (string, error) {
-	var nonExistentPathResolution string
-
-	// Start with a cleaned up path before checking the more complex bits.
-	r := fs.unsafeFilePath(p)
-
-	// At the same time, evaluate the symlink status and determine where this file or folder
-	// is truly pointing to.
-	p, err := filepath.EvalSymlinks(r)
-	if err != nil && !os.IsNotExist(err) {
-		return "", err
-	} else if os.IsNotExist(err) {
-		// The requested directory doesn't exist, so at this point we need to iterate up the
-		// path chain until we hit a directory that _does_ exist and can be validated.
-		parts := strings.Split(filepath.Dir(r), "/")
-
-		var try string
-		// Range over all of the path parts and form directory pathings from the end
-		// moving up until we have a valid resolution or we run out of paths to try.
-		for k := range parts {
-			try = strings.Join(parts[:(len(parts)-k)], "/")
-
-			if !fs.unsafeIsInDataDirectory(try) {
-				break
-			}
-
-			t, err := filepath.EvalSymlinks(try)
-			if err == nil {
-				nonExistentPathResolution = t
-				break
-			}
-		}
-	}
-
-	// If the new path doesn't start with their root directory there is clearly an escape
-	// attempt going on, and we should NOT resolve this path for them.
-	if nonExistentPathResolution != "" {
-		if !fs.unsafeIsInDataDirectory(nonExistentPathResolution) {
-			return "", PathResolutionError{}
-		}
-
-		// If the nonExistentPathResolution variable is not empty then the initial path requested
-		// did not exist and we looped through the pathway until we found a match. At this point
-		// we've confirmed the first matched pathway exists in the root server directory, so we
-		// can go ahead and just return the path that was requested initially.
-		return r, nil
-	}
-
-	// If the requested directory from EvalSymlinks begins with the server root directory go
-	// ahead and return it. If not we'll return an error which will block any further action
-	// on the file.
-	if fs.unsafeIsInDataDirectory(p) {
-		return p, nil
-	}
-
-	return "", PathResolutionError{}
-}
-
-// Generate a path to the file by cleaning it up and appending the root server path to it. This
-// DOES NOT guarantee that the file resolves within the server data directory. You'll want to use
-// the fs.unsafeIsInDataDirectory(p) function to confirm.
-func (fs *Filesystem) unsafeFilePath(p string) string {
-	// Calling filepath.Clean on the joined directory will resolve it to the absolute path,
-	// removing any ../ type of resolution arguments, and leaving us with a direct path link.
-	//
-	// This will also trim the existing root path off the beginning of the path passed to
-	// the function since that can get a bit messy.
-	return filepath.Clean(filepath.Join(fs.Path(), strings.TrimPrefix(p, fs.Path())))
-}
-
-// Check that that path string starts with the server data directory path. This function DOES NOT
-// validate that the rest of the path does not end up resolving out of this directory, or that the
-// targeted file or folder is not a symlink doing the same thing.
-func (fs *Filesystem) unsafeIsInDataDirectory(p string) bool {
-	return strings.HasPrefix(strings.TrimSuffix(p, "/")+"/", strings.TrimSuffix(fs.Path(), "/")+"/")
-}
-
-// Helper function to keep some of the codebase a little cleaner. Returns a "safe" version of the path
-// joined with a file. This is important because you cannot just assume that appending a file to a cleaned
-// path will result in a cleaned path to that file. For example, imagine you have the following scenario:
-//
-// my_bad_file -> symlink:/etc/passwd
-//
-// cleaned := SafePath("../../etc") -> "/"
-// filepath.Join(cleaned, my_bad_file) -> "/my_bad_file"
-//
-// You might think that "/my_bad_file" is fine since it isn't pointing to the original "../../etc/my_bad_file".
-// However, this doesn't account for symlinks where the file might be pointing outside of the directory, so
-// calling a function such as Chown against it would chown the symlinked location, and not the file within the
-// Wings daemon.
-func (fs *Filesystem) SafeJoin(dir string, f os.FileInfo) (string, error) {
-	if f.Mode()&os.ModeSymlink != 0 {
-		return fs.SafePath(filepath.Join(dir, f.Name()))
-	}
-
-	return filepath.Join(dir, f.Name()), nil
-}
-
-// Executes the fs.SafePath function in parallel against an array of paths. If any of the calls
-// fails an error will be returned.
-func (fs *Filesystem) ParallelSafePath(paths []string) ([]string, error) {
-	var cleaned []string
-
-	// Simple locker function to avoid racy appends to the array of cleaned paths.
-	var m = new(sync.Mutex)
-	var push = func(c string) {
-		m.Lock()
-		cleaned = append(cleaned, c)
-		m.Unlock()
-	}
-
-	// Create an error group that we can use to run processes in parallel while retaining
-	// the ability to cancel the entire process immediately should any of it fail.
-	g, ctx := errgroup.WithContext(context.Background())
-
-	// Iterate over all of the paths and generate a cleaned path, if there is an error for any
-	// of the files, abort the process.
-	for _, p := range paths {
-		// Create copy so we can use it within the goroutine correctly.
-		pi := p
-
-		// Recursively call this function to continue digging through the directory tree within
-		// a seperate goroutine. If the context is canceled abort this process.
-		g.Go(func() error {
-			select {
-			case <-ctx.Done():
-				return ctx.Err()
-			default:
-				// If the callback returns true, go ahead and keep walking deeper. This allows
-				// us to programatically continue deeper into directories, or stop digging
-				// if that pathway knows it needs nothing else.
-				if c, err := fs.SafePath(pi); err != nil {
-					return err
-				} else {
-					push(c)
-				}
-
-				return nil
-			}
-		})
-	}
-
-	// Block until all of the routines finish and have returned a value.
-	return cleaned, g.Wait()
-}
-
-// Determines if the directory a file is trying to be added to has enough space available
-// for the file to be written to.
-//
-// Because determining the amount of space being used by a server is a taxing operation we
-// will load it all up into a cache and pull from that as long as the key is not expired.
-func (fs *Filesystem) HasSpaceAvailable() bool {
-	size, err := fs.getCachedDiskUsage()
-	if err != nil {
-		fs.Server.Log().WithField("error", err).Warn("failed to determine root server directory size")
-	}
-
-	// Determine if their folder size, in bytes, is smaller than the amount of space they've
-	// been allocated.
-	fs.Server.Proc().SetDisk(size)
-
-	space := fs.Server.Build().DiskSpace
-	// If space is -1 or 0 just return true, means they're allowed unlimited.
-	//
-	// Technically we could skip disk space calculation because we don't need to check if the server exceeds it's limit
-	// but because this method caches the disk usage it would be best to calculate the disk usage and always
-	// return true.
-	if space <= 0 {
-		return true
-	}
-
-	return (size / 1000.0 / 1000.0) <= space
-}
-
-// Internal helper function to allow other parts of the codebase to check the total used disk space
-// as needed without overly taxing the system. This will prioritize the value from the cache to avoid
-// excessive IO usage. We will only walk the filesystem and determine the size of the directory if there
-// is no longer a cached value.
-func (fs *Filesystem) getCachedDiskUsage() (int64, error) {
-	// Obtain an exclusive lock on this process so that we don't unintentionally run it at the same
-	// time as another running process. Once the lock is available it'll read from the cache for the
-	// second call rather than hitting the disk in parallel.
-	//
-	// This effectively the same speed as running this call in parallel since this cache will return
-	// instantly on the second call.
-	fs.mu.Lock()
-	defer fs.mu.Unlock()
-
-	// Expire the cache after 2.5 minutes.
-	if fs.lastLookupTime.After(time.Now().Add(time.Second * -150)) {
-		return fs.diskUsage, nil
-	}
-
-	// If there is no size its either because there is no data (in which case running this function
-	// will have effectively no impact), or there is nothing in the cache, in which case we need to
-	// grab the size of their data directory. This is a taxing operation, so we want to store it in
-	// the cache once we've gotten it.
-	size, err := fs.DirectorySize("/")
-
-	// Always cache the size, even if there is an error. We want to always return that value
-	// so that we don't cause an endless loop of determining the disk size if there is a temporary
-	// error encountered.
-	fs.lastLookupTime = time.Now()
-	atomic.StoreInt64(&fs.diskUsage, size)
-
-	return size, err
-}
-
-// Determines the directory size of a given location by running parallel tasks to iterate
-// through all of the folders. Returns the size in bytes. This can be a fairly taxing operation
-// on locations with tons of files, so it is recommended that you cache the output.
-func (fs *Filesystem) DirectorySize(dir string) (int64, error) {
-	d, err := fs.SafePath(dir)
-	if err != nil {
-		return 0, errors.WithStack(err)
-	}
-
-	var size int64
-	var st syscall.Stat_t
-
-	err = godirwalk.Walk(d, &godirwalk.Options{
-		Unsorted: true,
-		Callback: func(p string, e *godirwalk.Dirent) error {
-			// If this is a symlink then resolve the final destination of it before trying to continue walking
-			// over its contents. If it resolves outside the server data directory just skip everything else for
-			// it. Otherwise, allow it to continue.
-			if e.IsSymlink() {
-				if _, err := fs.SafePath(p); err != nil {
-					if IsPathResolutionError(err) {
-						return godirwalk.SkipThis
-					}
-
-					return err
-				}
-			}
-
-			if !e.IsDir() {
-				syscall.Lstat(p, &st)
-				atomic.AddInt64(&size, st.Size)
-			}
-
-			return nil
-		},
-	})
-
-	return size, errors.WithStack(err)
-}
-
-// Reads a file on the system and returns it as a byte representation in a file
-// reader. This is not the most memory efficient usage since it will be reading the
-// entirety of the file into memory.
-func (fs *Filesystem) Readfile(p string) (io.Reader, error) {
-	cleaned, err := fs.SafePath(p)
-	if err != nil {
-		return nil, err
-	}
-
-	b, err := ioutil.ReadFile(cleaned)
-	if err != nil {
-		return nil, err
-	}
-
-	return bytes.NewReader(b), nil
-}
-
-// Writes a file to the system. If the file does not already exist one will be created.
-func (fs *Filesystem) Writefile(p string, r io.Reader) error {
-	cleaned, err := fs.SafePath(p)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	var currentSize int64
-
-	// If the file does not exist on the system already go ahead and create the pathway
-	// to it and an empty file. We'll then write to it later on after this completes.
-	if stat, err := os.Stat(cleaned); err != nil {
-		if !os.IsNotExist(err) {
-			return errors.WithStack(err)
-		}
-
-		if err := os.MkdirAll(filepath.Dir(cleaned), 0755); err != nil {
-			return errors.WithStack(err)
-		}
-
-		if err := fs.Chown(filepath.Dir(cleaned)); err != nil {
-			return errors.WithStack(err)
-		}
-	} else {
-		if stat.IsDir() {
-			return errors.New("cannot write file contents to a directory")
-		}
-
-		currentSize = stat.Size()
-	}
-
-	// This will either create the file if it does not already exist, or open and
-	// truncate the existing file.
-	file, err := os.OpenFile(cleaned, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-	defer file.Close()
-
-	buf := make([]byte, 1024*4)
-	sz, err := io.CopyBuffer(file, r, buf)
-
-	// Adjust the disk usage to account for the old size and the new size of the file.
-	atomic.AddInt64(&fs.diskUsage, sz-currentSize)
-
-	// Finally, chown the file to ensure the permissions don't end up out-of-whack
-	// if we had just created it.
-	return fs.Chown(cleaned)
-}
-
-// Defines the stat struct object.
-type Stat struct {
-	Info     os.FileInfo
-	Mimetype string
-}
-
-func (s *Stat) MarshalJSON() ([]byte, error) {
-	return json.Marshal(struct {
-		Name      string `json:"name"`
-		Created   string `json:"created"`
-		Modified  string `json:"modified"`
-		Mode      string `json:"mode"`
-		Size      int64  `json:"size"`
-		Directory bool   `json:"directory"`
-		File      bool   `json:"file"`
-		Symlink   bool   `json:"symlink"`
-		Mime      string `json:"mime"`
-	}{
-		Name:      s.Info.Name(),
-		Created:   s.CTime().Format(time.RFC3339),
-		Modified:  s.Info.ModTime().Format(time.RFC3339),
-		Mode:      s.Info.Mode().String(),
-		Size:      s.Info.Size(),
-		Directory: s.Info.IsDir(),
-		File:      !s.Info.IsDir(),
-		Symlink:   s.Info.Mode().Perm()&os.ModeSymlink != 0,
-		Mime:      s.Mimetype,
-	})
-}
-
-// Stats a file or folder and returns the base stat object from go along with the
-// MIME data that can be used for editing files.
-func (fs *Filesystem) Stat(p string) (*Stat, error) {
-	cleaned, err := fs.SafePath(p)
-	if err != nil {
-		return nil, err
-	}
-
-	return fs.unsafeStat(cleaned)
-}
-
-func (fs *Filesystem) unsafeStat(p string) (*Stat, error) {
-	s, err := os.Stat(p)
-	if err != nil {
-		return nil, err
-	}
-
-	var m *mimetype.MIME
-	if !s.IsDir() {
-		m, err = mimetype.DetectFile(p)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	st := &Stat{
-		Info:     s,
-		Mimetype: "inode/directory",
-	}
-
-	if m != nil {
-		st.Mimetype = m.String()
-	}
-
-	return st, nil
-}
-
-// Creates a new directory (name) at a specified path (p) for the server.
-func (fs *Filesystem) CreateDirectory(name string, p string) error {
-	cleaned, err := fs.SafePath(path.Join(p, name))
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	return os.MkdirAll(cleaned, 0755)
-}
-
-// Moves (or renames) a file or directory.
-func (fs *Filesystem) Rename(from string, to string) error {
-	cleanedFrom, err := fs.SafePath(from)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	cleanedTo, err := fs.SafePath(to)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	if f, err := os.Stat(cleanedFrom); err != nil {
-		return errors.WithStack(err)
-	} else {
-		d := cleanedTo
-		if !f.IsDir() {
-			d = strings.TrimSuffix(d, path.Base(cleanedTo))
-		}
-
-		// Ensure that the directory we're moving into exists correctly on the system.
-		if mkerr := os.MkdirAll(d, 0644); mkerr != nil {
-			return errors.WithStack(mkerr)
-		}
-	}
-
-	return os.Rename(cleanedFrom, cleanedTo)
-}
-
-// Recursively iterates over a file or directory and sets the permissions on all of the
-// underlying files. Iterate over all of the files and directories. If it is a file just
-// go ahead and perform the chown operation. Otherwise dig deeper into the directory until
-// we've run out of directories to dig into.
-func (fs *Filesystem) Chown(path string) error {
-	cleaned, err := fs.SafePath(path)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	uid := config.Get().System.User.Uid
-	gid := config.Get().System.User.Gid
-
-	// Start by just chowning the initial path that we received.
-	if err := os.Chown(cleaned, uid, gid); err != nil {
-		return errors.WithStack(err)
-	}
-
-	// If this is not a directory we can now return from the function, there is nothing
-	// left that we need to do.
-	if st, _ := os.Stat(cleaned); !st.IsDir() {
-		return nil
-	}
-
-	// If this was a directory, begin walking over its contents recursively and ensure that all
-	// of the subfiles and directories get their permissions updated as well.
-	return godirwalk.Walk(cleaned, &godirwalk.Options{
-		Unsorted: true,
-		Callback: func(p string, e *godirwalk.Dirent) error {
-			// Do not attempt to chmod a symlink. Go's os.Chown function will affect the symlink
-			// so if it points to a location outside the data directory the user would be able to
-			// (un)intentionally modify that files permissions.
-			if e.IsSymlink() {
-				if e.IsDir() {
-					return godirwalk.SkipThis
-				}
-
-				return nil
-			}
-
-			return os.Chown(p, uid, gid)
-		},
-	})
-}
-
-// Copies a given file to the same location and appends a suffix to the file to indicate that
-// it has been copied.
-//
-// @todo need to get an exclusive lock on the file.
-func (fs *Filesystem) Copy(p string) error {
-	cleaned, err := fs.SafePath(p)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	if s, err := os.Stat(cleaned); err != nil {
-		return errors.WithStack(err)
-	} else if s.IsDir() || !s.Mode().IsRegular() {
-		// If this is a directory or not a regular file, just throw a not-exist error
-		// since anything calling this function should understand what that means.
-		return os.ErrNotExist
-	}
-
-	base := filepath.Base(cleaned)
-	relative := strings.TrimSuffix(strings.TrimPrefix(cleaned, fs.Path()), base)
-	extension := filepath.Ext(base)
-	name := strings.TrimSuffix(base, filepath.Ext(base))
-
-	// Begin looping up to 50 times to try and create a unique copy file name. This will take
-	// an input of "file.txt" and generate "file copy.txt". If that name is already taken, it will
-	// then try to write "file copy 2.txt" and so on, until reaching 50 loops. At that point we
-	// won't waste anymore time, just use the current timestamp and make that copy.
-	//
-	// Could probably make this more efficient by checking if there are any files matching the copy
-	// pattern, and trying to find the highest number and then incrementing it by one rather than
-	// looping endlessly.
-	var i int
-	copySuffix := " copy"
-	for i = 0; i < 51; i++ {
-		if i > 0 {
-			copySuffix = " copy " + strconv.Itoa(i)
-		}
-
-		tryName := fmt.Sprintf("%s%s%s", name, copySuffix, extension)
-		tryLocation, err := fs.SafePath(path.Join(relative, tryName))
-		if err != nil {
-			return errors.WithStack(err)
-		}
-
-		// If the file exists, continue to the next loop, otherwise we're good to start a copy.
-		if _, err := os.Stat(tryLocation); err != nil && !os.IsNotExist(err) {
-			return errors.WithStack(err)
-		} else if os.IsNotExist(err) {
-			break
-		}
-
-		if i == 50 {
-			copySuffix = "." + time.Now().Format(time.RFC3339)
-		}
-	}
-
-	finalPath, err := fs.SafePath(path.Join(relative, fmt.Sprintf("%s%s%s", name, copySuffix, extension)))
-	if err != nil {
-		return errors.WithStack(err)
-	}
-
-	source, err := os.Open(cleaned)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-	defer source.Close()
-
-	dest, err := os.Create(finalPath)
-	if err != nil {
-		return errors.WithStack(err)
-	}
-	defer dest.Close()
-
-	buf := make([]byte, 1024*4)
-	if _, err := io.CopyBuffer(dest, source, buf); err != nil {
-		return errors.WithStack(err)
-	}
-
-	return nil
-}
-
-// Deletes a file or folder from the system. Prevents the user from accidentally
-// (or maliciously) removing their root server data directory.
-func (fs *Filesystem) Delete(p string) error {
-	// This is one of the few (only?) places in the codebase where we're explictly not using
-	// the SafePath functionality when working with user provided input. If we did, you would
-	// not be able to delete a file that is a symlink pointing to a location outside of the data
-	// directory.
-	//
-	// We also want to avoid resolving a symlink that points _within_ the data directory and thus
-	// deleting the actual source file for the symlink rather than the symlink itself. For these
-	// purposes just resolve the actual file path using filepath.Join() and confirm that the path
-	// exists within the data directory.
-	resolved := fs.unsafeFilePath(p)
-	if !fs.unsafeIsInDataDirectory(resolved) {
-		return PathResolutionError{}
-	}
-
-	// Block any whoopsies.
-	if resolved == fs.Path() {
-		return errors.New("cannot delete root server directory")
-	}
-
-	if st, err := os.Stat(resolved); err != nil {
-		if !os.IsNotExist(err) {
-			fs.Server.Log().WithField("error", err).WithField("path", resolved).Warn("error while attempting to stat file before deletion")
-		}
-	} else {
-		if !st.IsDir() {
-			atomic.SwapInt64(&fs.diskUsage, -st.Size())
-		} else {
-			go func(st os.FileInfo, resolved string) {
-				if s, err := fs.DirectorySize(resolved); err == nil {
-					atomic.AddInt64(&fs.diskUsage, -s)
-				}
-			}(st, resolved)
-		}
-	}
-
-	return os.RemoveAll(resolved)
-}
-
-// Lists the contents of a given directory and returns stat information about each
-// file and folder within it.
-func (fs *Filesystem) ListDirectory(p string) ([]*Stat, error) {
-	cleaned, err := fs.SafePath(p)
-	if err != nil {
-		return nil, err
-	}
-
-	files, err := ioutil.ReadDir(cleaned)
-	if err != nil {
-		return nil, err
-	}
-
-	var wg sync.WaitGroup
-
-	// You must initialize the output of this directory as a non-nil value otherwise
-	// when it is marshaled into a JSON object you'll just get 'null' back, which will
-	// break the panel badly.
-	out := make([]*Stat, len(files))
-
-	// Iterate over all of the files and directories returned and perform an async process
-	// to get the mime-type for them all.
-	for i, file := range files {
-		wg.Add(1)
-
-		go func(idx int, f os.FileInfo) {
-			defer wg.Done()
-
-			var m *mimetype.MIME
-			var d = "inode/directory"
-			if !f.IsDir() {
-				cleanedp, _ := fs.SafeJoin(cleaned, f)
-				if cleanedp != "" {
-					m, _ = mimetype.DetectFile(filepath.Join(cleaned, f.Name()))
-				} else {
-					// Just pass this for an unknown type because the file could not safely be resolved within
-					// the server data path.
-					d = "application/octet-stream"
-				}
-			}
-
-			st := &Stat{
-				Info:     f,
-				Mimetype: d,
-			}
-
-			if m != nil {
-				st.Mimetype = m.String()
-			}
-
-			out[idx] = st
-		}(i, file)
-	}
-
-	wg.Wait()
-
-	// Sort the output alphabetically to begin with since we've run the output
-	// through an asynchronous process and the order is gonna be very random.
-	sort.SliceStable(out, func(i, j int) bool {
-		if out[i].Info.Name() == out[j].Info.Name() || out[i].Info.Name() > out[j].Info.Name() {
-			return true
-		}
-
-		return false
-	})
-
-	// Then, sort it so that directories are listed first in the output. Everything
-	// will continue to be alphabetized at this point.
-	sort.SliceStable(out, func(i, j int) bool {
-		return out[i].Info.IsDir()
-	})
-
-	return out, nil
 }
 
 // Ensures that the data directory for the server instance exists.
-func (fs *Filesystem) EnsureDataDirectory() error {
+func (s *Server) EnsureDataDirectoryExists() error {
-	if _, err := os.Stat(fs.Path()); err != nil && !os.IsNotExist(err) {
+	if _, err := os.Stat(s.fs.Path()); err != nil && !os.IsNotExist(err) {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	} else if err != nil {
 		// Create the server data directory because it does not currently exist
 		// on the system.
-		if err := os.MkdirAll(fs.Path(), 0700); err != nil {
+		if err := os.MkdirAll(s.fs.Path(), 0700); err != nil {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
+		}
+
+		if err := s.fs.Chown("/"); err != nil {
+			s.Log().WithField("error", err).Warn("failed to chown server data directory")
 		}
 	}
 
 	return nil
 }
-
-// Given a directory, iterate through all of the files and folders within it and determine
-// if they should be included in the output based on an array of ignored matches. This uses
-// standard .gitignore formatting to make that determination.
-//
-// If no ignored files are passed through you'll get the entire directory listing.
-func (fs *Filesystem) GetIncludedFiles(dir string, ignored []string) (*backup.IncludedFiles, error) {
-	cleaned, err := fs.SafePath(dir)
-	if err != nil {
-		return nil, err
-	}
-
-	i, err := ignore.CompileIgnoreLines(ignored...)
-	if err != nil {
-		return nil, err
-	}
-
-	// Walk through all of the files and directories on a server. This callback only returns
-	// files found, and will keep walking deeper and deeper into directories.
-	inc := new(backup.IncludedFiles)
-
-	err = godirwalk.Walk(cleaned, &godirwalk.Options{
-		Unsorted: true,
-		Callback: func(p string, e *godirwalk.Dirent) error {
-			sp := p
-			if e.IsSymlink() {
-				sp, err = fs.SafePath(p)
-				if err != nil {
-					if IsPathResolutionError(err) {
-						return godirwalk.SkipThis
-					}
-
-					return err
-				}
-			}
-
-			// Avoid unnecessary parsing if there are no ignored files, nothing will match anyways
-			// so no reason to call the function.
-			if len(ignored) == 0 || !i.MatchesPath(strings.TrimPrefix(sp, fs.Path()+"/")) {
-				inc.Push(sp)
-			}
-
-			// We can't just abort if the path is technically ignored. It is possible there is a nested
-			// file or folder that should not be excluded, so in this case we need to just keep going
-			// until we get to a final state.
-			return nil
-		},
-	})
-
-	return inc, errors.WithStack(err)
-}
-
-// Compresses all of the files matching the given paths in the specified directory. This function
-// also supports passing nested paths to only compress certain files and folders when working in
-// a larger directory. This effectively creates a local backup, but rather than ignoring specific
-// files and folders, it takes an allow-list of files and folders.
-//
-// All paths are relative to the dir that is passed in as the first argument, and the compressed
-// file will be placed at that location named `archive-{date}.tar.gz`.
-func (fs *Filesystem) CompressFiles(dir string, paths []string) (os.FileInfo, error) {
-	cleanedRootDir, err := fs.SafePath(dir)
-	if err != nil {
-		return nil, err
-	}
-
-	// Take all of the paths passed in and merge them together with the root directory we've gotten.
-	for i, p := range paths {
-		paths[i] = filepath.Join(cleanedRootDir, p)
-	}
-
-	cleaned, err := fs.ParallelSafePath(paths)
-	if err != nil {
-		return nil, err
-	}
-
-	inc := new(backup.IncludedFiles)
-	// Iterate over all of the cleaned paths and merge them into a large object of final file
-	// paths to pass into the archiver. As directories are encountered this will drop into them
-	// and look for all of the files.
-	for _, p := range cleaned {
-		f, err := os.Stat(p)
-		if err != nil {
-			fs.Server.Log().WithField("error", err).WithField("path", p).Debug("failed to stat file or directory for compression")
-			continue
-		}
-
-		if !f.IsDir() {
-			inc.Push(p)
-		} else {
-			err := godirwalk.Walk(p, &godirwalk.Options{
-				Unsorted: true,
-				Callback: func(p string, e *godirwalk.Dirent) error {
-					sp := p
-					if e.IsSymlink() {
-						// Ensure that any symlinks are properly resolved to their final destination. If
-						// that destination is outside the server directory skip over this entire item, otherwise
-						// use the resolved location for the rest of this function.
-						sp, err = fs.SafePath(p)
-						if err != nil {
-							if IsPathResolutionError(err) {
-								return godirwalk.SkipThis
-							}
-
-							return err
-						}
-					}
-
-					if !e.IsDir() {
-						inc.Push(sp)
-					}
-
-					return nil
-				},
-			})
-
-			if err != nil {
-				return nil, err
-			}
-		}
-	}
-
-	a := &backup.Archive{TrimPrefix: fs.Path(), Files: inc}
-
-	d := path.Join(cleanedRootDir, fmt.Sprintf("archive-%s.tar.gz", strings.ReplaceAll(time.Now().Format(time.RFC3339), ":", "")))
-
-	return a.Create(d, context.Background())
-}
-
-// Handle errors encountered when walking through directories.
-//
-// If there is a path resolution error just skip the item entirely. Only return this for a
-// directory, otherwise return nil. Returning this error for a file will stop the walking
-// for the remainder of the directory. This is assuming an os.FileInfo struct was even returned.
-func (fs *Filesystem) handleWalkerError(err error, f os.FileInfo) error {
-	if !IsPathResolutionError(err) {
-		return err
-	}
-
-	if f != nil && f.IsDir() {
-		return filepath.SkipDir
-	}
-
-	return nil
-}

server/filesystem/compress.go

@@ -0,0 +1,163 @@
+package filesystem
+
+import (
+	"context"
+	"emperror.dev/errors"
+	"fmt"
+	"github.com/karrick/godirwalk"
+	"github.com/pterodactyl/wings/server/backup"
+	ignore "github.com/sabhiram/go-gitignore"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+// Given a directory, iterate through all of the files and folders within it and determine
+// if they should be included in the output based on an array of ignored matches. This uses
+// standard .gitignore formatting to make that determination.
+//
+// If no ignored files are passed through you'll get the entire directory listing.
+func (fs *Filesystem) GetIncludedFiles(dir string, ignored []string) (*backup.IncludedFiles, error) {
+	cleaned, err := fs.SafePath(dir)
+	if err != nil {
+		return nil, err
+	}
+
+	i, err := ignore.CompileIgnoreLines(ignored...)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	// Walk through all of the files and directories on a server. This callback only returns
+	// files found, and will keep walking deeper and deeper into directories.
+	inc := new(backup.IncludedFiles)
+
+	err = godirwalk.Walk(cleaned, &godirwalk.Options{
+		Unsorted: true,
+		Callback: func(p string, e *godirwalk.Dirent) error {
+			sp := p
+			if e.IsSymlink() {
+				sp, err = fs.SafePath(p)
+				if err != nil {
+					if IsBadPathResolutionError(err) {
+						return godirwalk.SkipThis
+					}
+
+					return err
+				}
+			}
+
+			// Only push files into the result array since archives can't create an empty directory within them.
+			if !e.IsDir() {
+				// Avoid unnecessary parsing if there are no ignored files, nothing will match anyways
+				// so no reason to call the function.
+				if len(ignored) == 0 || !i.MatchesPath(strings.TrimPrefix(sp, fs.Path()+"/")) {
+					inc.Push(sp)
+				}
+			}
+
+			// We can't just abort if the path is technically ignored. It is possible there is a nested
+			// file or folder that should not be excluded, so in this case we need to just keep going
+			// until we get to a final state.
+			return nil
+		},
+	})
+
+	return inc, errors.WithStackIf(err)
+}
+
+// Compresses all of the files matching the given paths in the specified directory. This function
+// also supports passing nested paths to only compress certain files and folders when working in
+// a larger directory. This effectively creates a local backup, but rather than ignoring specific
+// files and folders, it takes an allow-list of files and folders.
+//
+// All paths are relative to the dir that is passed in as the first argument, and the compressed
+// file will be placed at that location named `archive-{date}.tar.gz`.
+func (fs *Filesystem) CompressFiles(dir string, paths []string) (os.FileInfo, error) {
+	cleanedRootDir, err := fs.SafePath(dir)
+	if err != nil {
+		return nil, err
+	}
+
+	// Take all of the paths passed in and merge them together with the root directory we've gotten.
+	for i, p := range paths {
+		paths[i] = filepath.Join(cleanedRootDir, p)
+	}
+
+	cleaned, err := fs.ParallelSafePath(paths)
+	if err != nil {
+		return nil, err
+	}
+
+	inc := new(backup.IncludedFiles)
+	// Iterate over all of the cleaned paths and merge them into a large object of final file
+	// paths to pass into the archiver. As directories are encountered this will drop into them
+	// and look for all of the files.
+	for _, p := range cleaned {
+		f, err := os.Stat(p)
+		if err != nil {
+			fs.error(err).WithField("path", p).Debug("failed to stat file or directory for compression")
+			continue
+		}
+
+		if !f.IsDir() {
+			inc.Push(p)
+		} else {
+			err := godirwalk.Walk(p, &godirwalk.Options{
+				Unsorted: true,
+				Callback: func(p string, e *godirwalk.Dirent) error {
+					sp := p
+					if e.IsSymlink() {
+						// Ensure that any symlinks are properly resolved to their final destination. If
+						// that destination is outside the server directory skip over this entire item, otherwise
+						// use the resolved location for the rest of this function.
+						sp, err = fs.SafePath(p)
+						if err != nil {
+							if IsBadPathResolutionError(err) {
+								return godirwalk.SkipThis
+							}
+
+							return err
+						}
+					}
+
+					if !e.IsDir() {
+						inc.Push(sp)
+					}
+
+					return nil
+				},
+			})
+
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	a := &backup.Archive{TrimPrefix: fs.Path(), Files: inc}
+	d := path.Join(cleanedRootDir, fmt.Sprintf("archive-%s.tar.gz", strings.ReplaceAll(time.Now().Format(time.RFC3339), ":", "")))
+
+	if err := a.Create(d, context.Background()); err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+
+	f, err := os.Stat(d)
+	if err != nil {
+		_ = os.Remove(d)
+
+		return nil, err
+	}
+
+	if err := fs.hasSpaceFor(f.Size()); err != nil {
+		_ = os.Remove(d)
+
+		return nil, err
+	}
+
+	fs.addDisk(f.Size())
+
+	return f, nil
+}

server/filesystem/decompress.go

@@ -1,16 +1,16 @@
-package server
+package filesystem
 
 import (
 	"archive/tar"
 	"archive/zip"
 	"compress/gzip"
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/mholt/archiver/v3"
-	"github.com/pkg/errors"
 	"os"
 	"path/filepath"
 	"reflect"
-	"sync"
+	"strings"
 	"sync/atomic"
 )
 
@@ -19,7 +19,7 @@ import (
 func (fs *Filesystem) SpaceAvailableForDecompression(dir string, file string) (bool, error) {
 	// Don't waste time trying to determine this if we know the server will have the space for
 	// it since there is no limit.
-	if fs.Server.Build().DiskSpace <= 0 {
+	if fs.MaxDisk() <= 0 {
 		return true, nil
 	}
 
@@ -28,37 +28,29 @@ func (fs *Filesystem) SpaceAvailableForDecompression(dir string, file string) (b
 		return false, err
 	}
 
-	wg := new(sync.WaitGroup)
-
-	var dirSize int64
-	var cErr error
 	// Get the cached size in a parallel process so that if it is not cached we are not
 	// waiting an unnecessary amount of time on this call.
-	go func() {
+	dirSize, err := fs.DiskUsage(false)
-		wg.Add(1)
-		defer wg.Done()
-
-		dirSize, cErr = fs.getCachedDiskUsage()
-	}()
 
 	var size int64
-	// In a seperate thread, walk over the archive and figure out just how large the final
+	// Walk over the archive and figure out just how large the final output would be from unarchiving it.
-	// output would be from dearchiving it.
+	err = archiver.Walk(source, func(f archiver.File) error {
-	go func() {
+		if atomic.AddInt64(&size, f.Size())+dirSize > fs.MaxDisk() {
-		wg.Add(1)
+			return ErrNotEnoughDiskSpace
-		defer wg.Done()
+		}
 
-		// Walk all of the files and calculate the total decompressed size of this archive.
+		return nil
-		archiver.Walk(source, func(f archiver.File) error {
+	})
-			atomic.AddInt64(&size, f.Size())
 
-			return nil
+	if err != nil {
-		})
+		if strings.HasPrefix(err.Error(), "format ") {
-	}()
+			return false, ErrUnknownArchiveFormat
+		}
 
-	wg.Wait()
+		return false, errors.WithStackIf(err)
+	}
 
-	return ((dirSize + size) / 1000.0 / 1000.0) <= fs.Server.Build().DiskSpace, cErr
+	return true, errors.WithStackIf(err)
 }
 
 // Decompress a file in a given directory by using the archiver tool to infer the file
@@ -68,18 +60,18 @@ func (fs *Filesystem) SpaceAvailableForDecompression(dir string, file string) (b
 func (fs *Filesystem) DecompressFile(dir string, file string) error {
 	source, err := fs.SafePath(filepath.Join(dir, file))
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Make sure the file exists basically.
 	if _, err := os.Stat(source); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Walk over all of the files spinning up an additional go-routine for each file we've encountered
 	// and then extract that file from the archive and write it to the disk. If any part of this process
 	// encounters an error the entire process will be stopped.
-	return archiver.Walk(source, func(f archiver.File) error {
+	err = archiver.Walk(source, func(f archiver.File) error {
 		// Don't waste time with directories, we don't need to create them if they have no contents, and
 		// we will ensure the directory exists when opening the file for writing anyways.
 		if f.IsDir() {
@@ -99,6 +91,20 @@ func (fs *Filesystem) DecompressFile(dir string, file string) error {
 			return errors.New(fmt.Sprintf("could not parse underlying data source with type %s", reflect.TypeOf(s).String()))
 		}
 
-		return errors.Wrap(fs.Writefile(name, f), "could not extract file from archive")
+		p, err := fs.SafePath(filepath.Join(dir, name))
+		if err != nil {
+			return errors.WrapIf(err, "failed to generate a safe path to server file")
+		}
+
+		return errors.WrapIf(fs.Writefile(p, f), "could not extract file from archive")
 	})
+	if err != nil {
+		if strings.HasPrefix(err.Error(), "format ") {
+			return errors.WithStackIf(ErrUnknownArchiveFormat)
+		}
+
+		return errors.WithStackIf(err)
+	}
+
+	return nil
 }

server/filesystem/disk_space.go

@@ -0,0 +1,232 @@
+package filesystem
+
+import (
+	"emperror.dev/errors"
+	"github.com/apex/log"
+	"github.com/karrick/godirwalk"
+	"sync"
+	"sync/atomic"
+	"syscall"
+	"time"
+)
+
+type SpaceCheckingOpts struct {
+	AllowStaleResponse bool
+}
+
+type usageLookupTime struct {
+	sync.RWMutex
+	value time.Time
+}
+
+// Update the last time that a disk space lookup was performed.
+func (ult *usageLookupTime) Set(t time.Time) {
+	ult.Lock()
+	ult.value = t
+	ult.Unlock()
+}
+
+// Get the last time that we performed a disk space usage lookup.
+func (ult *usageLookupTime) Get() time.Time {
+	ult.RLock()
+	defer ult.RUnlock()
+
+	return ult.value
+}
+
+// Returns the maximum amount of disk space that this Filesystem instance is allowed to use.
+func (fs *Filesystem) MaxDisk() int64 {
+	fs.mu.RLock()
+	defer fs.mu.RUnlock()
+
+	return fs.diskLimit
+}
+
+// Sets the disk space limit for this Filesystem instance.
+func (fs *Filesystem) SetDiskLimit(i int64) {
+	fs.mu.Lock()
+	fs.diskLimit = i
+	fs.mu.Unlock()
+}
+
+// Determines if the directory a file is trying to be added to has enough space available
+// for the file to be written to.
+//
+// Because determining the amount of space being used by a server is a taxing operation we
+// will load it all up into a cache and pull from that as long as the key is not expired.
+//
+// This operation will potentially block unless allowStaleValue is set to true. See the
+// documentation on DiskUsage for how this affects the call.
+func (fs *Filesystem) HasSpaceAvailable(allowStaleValue bool) bool {
+	size, err := fs.DiskUsage(allowStaleValue)
+	if err != nil {
+		log.WithField("root", fs.root).WithField("error", err).Warn("failed to determine root fs directory size")
+	}
+
+	// If space is -1 or 0 just return true, means they're allowed unlimited.
+	//
+	// Technically we could skip disk space calculation because we don't need to check if the
+	// server exceeds it's limit but because this method caches the disk usage it would be best
+	// to calculate the disk usage and always return true.
+	if fs.MaxDisk() == 0 {
+		return true
+	}
+
+	return size <= fs.MaxDisk()
+}
+
+// Returns the cached value for the amount of disk space used by the filesystem. Do not rely on this
+// function for critical logical checks. It should only be used in areas where the actual disk usage
+// does not need to be perfect, e.g. API responses for server resource usage.
+func (fs *Filesystem) CachedUsage() int64 {
+	fs.mu.RLock()
+	defer fs.mu.RUnlock()
+
+	return fs.diskUsed
+}
+
+// Internal helper function to allow other parts of the codebase to check the total used disk space
+// as needed without overly taxing the system. This will prioritize the value from the cache to avoid
+// excessive IO usage. We will only walk the filesystem and determine the size of the directory if there
+// is no longer a cached value.
+//
+// If "allowStaleValue" is set to true, a stale value MAY be returned to the caller if there is an
+// expired cache value AND there is currently another lookup in progress. If there is no cached value but
+// no other lookup is in progress, a fresh disk space response will be returned to the caller.
+//
+// This is primarily to avoid a bunch of I/O operations from piling up on the server, especially on servers
+// with a large amount of files.
+func (fs *Filesystem) DiskUsage(allowStaleValue bool) (int64, error) {
+	if !fs.lastLookupTime.Get().After(time.Now().Add(time.Second * fs.diskCheckInterval * -1)) {
+		// If we are now allowing a stale response go ahead  and perform the lookup and return the fresh
+		// value. This is a blocking operation to the calling process.
+		if !allowStaleValue {
+			return fs.updateCachedDiskUsage()
+		} else if !fs.lookupInProgress.Get() {
+			// Otherwise, if we allow a stale value and there isn't a valid item in the cache and we aren't
+			// currently performing a lookup, just do the disk usage calculation in the background.
+			go func(fs *Filesystem) {
+				if _, err := fs.updateCachedDiskUsage(); err != nil {
+					log.WithField("root", fs.root).WithField("error", err).Warn("failed to update fs disk usage from within routine")
+				}
+			}(fs)
+		}
+	}
+
+	// Return the currently cached value back to the calling function.
+	return atomic.LoadInt64(&fs.diskUsed), nil
+}
+
+// Updates the currently used disk space for a server.
+func (fs *Filesystem) updateCachedDiskUsage() (int64, error) {
+	// Obtain an exclusive lock on this process so that we don't unintentionally run it at the same
+	// time as another running process. Once the lock is available it'll read from the cache for the
+	// second call rather than hitting the disk in parallel.
+	fs.mu.Lock()
+	defer fs.mu.Unlock()
+
+	// Signal that we're currently updating the disk size so that other calls to the disk checking
+	// functions can determine if they should queue up additional calls to this function. Ensure that
+	// we always set this back to "false" when this process is done executing.
+	fs.lookupInProgress.Set(true)
+	defer fs.lookupInProgress.Set(false)
+
+	// If there is no size its either because there is no data (in which case running this function
+	// will have effectively no impact), or there is nothing in the cache, in which case we need to
+	// grab the size of their data directory. This is a taxing operation, so we want to store it in
+	// the cache once we've gotten it.
+	size, err := fs.DirectorySize("/")
+
+	// Always cache the size, even if there is an error. We want to always return that value
+	// so that we don't cause an endless loop of determining the disk size if there is a temporary
+	// error encountered.
+	fs.lastLookupTime.Set(time.Now())
+
+	atomic.StoreInt64(&fs.diskUsed, size)
+
+	return size, err
+}
+
+// Determines the directory size of a given location by running parallel tasks to iterate
+// through all of the folders. Returns the size in bytes. This can be a fairly taxing operation
+// on locations with tons of files, so it is recommended that you cache the output.
+func (fs *Filesystem) DirectorySize(dir string) (int64, error) {
+	d, err := fs.SafePath(dir)
+	if err != nil {
+		return 0, errors.WithStackIf(err)
+	}
+
+	var size int64
+	var st syscall.Stat_t
+
+	err = godirwalk.Walk(d, &godirwalk.Options{
+		Unsorted: true,
+		Callback: func(p string, e *godirwalk.Dirent) error {
+			// If this is a symlink then resolve the final destination of it before trying to continue walking
+			// over its contents. If it resolves outside the server data directory just skip everything else for
+			// it. Otherwise, allow it to continue.
+			if e.IsSymlink() {
+				if _, err := fs.SafePath(p); err != nil {
+					if IsBadPathResolutionError(err) {
+						return godirwalk.SkipThis
+					}
+
+					return err
+				}
+			}
+
+			if !e.IsDir() {
+				syscall.Lstat(p, &st)
+				atomic.AddInt64(&size, st.Size)
+			}
+
+			return nil
+		},
+	})
+
+	return size, errors.WithStackIf(err)
+}
+
+// Helper function to determine if a server has space available for a file of a given size.
+// If space is available, no error will be returned, otherwise an ErrNotEnoughSpace error
+// will be raised.
+func (fs *Filesystem) hasSpaceFor(size int64) error {
+	if fs.MaxDisk() == 0 {
+		return nil
+	}
+
+	s, err := fs.DiskUsage(true)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	if (s + size) > fs.MaxDisk() {
+		return ErrNotEnoughDiskSpace
+	}
+
+	return nil
+}
+
+// Updates the disk usage for the Filesystem instance.
+func (fs *Filesystem) addDisk(i int64) int64 {
+	size := atomic.LoadInt64(&fs.diskUsed)
+
+	// Sorry go gods. This is ugly but the best approach I can come up with for right
+	// now without completely re-evaluating the logic we use for determining disk space.
+	//
+	// Normally I would just be using the atomic load right below, but I'm not sure about
+	// the scenarios where it is 0 because nothing has run that would trigger a disk size
+	// calculation?
+	//
+	// Perhaps that isn't even a concern for the sake of this?
+	if !fs.isTest {
+		size, _ = fs.DiskUsage(true)
+	}
+
+	// If we're dropping below 0 somehow just cap it to 0.
+	if (size + i) < 0 {
+		return atomic.SwapInt64(&fs.diskUsed, 0)
+	}
+
+	return atomic.AddInt64(&fs.diskUsed, i)
+}

server/filesystem/errors.go

@@ -0,0 +1,68 @@
+package filesystem
+
+import (
+	"emperror.dev/errors"
+	"fmt"
+	"github.com/apex/log"
+	"os"
+	"path/filepath"
+)
+
+var ErrIsDirectory = errors.Sentinel("filesystem: is a directory")
+var ErrNotEnoughDiskSpace = errors.Sentinel("filesystem: not enough disk space")
+var ErrUnknownArchiveFormat = errors.Sentinel("filesystem: unknown archive format")
+
+type BadPathResolutionError struct {
+	path     string
+	resolved string
+}
+
+// Returns the specific error for a bad path resolution.
+func (b *BadPathResolutionError) Error() string {
+	r := b.resolved
+	if r == "" {
+		r = "<empty>"
+	}
+	return fmt.Sprintf("filesystem: server path [%s] resolves to a location outside the server root: %s", b.path, r)
+}
+
+// Returns a new BadPathResolution error.
+func NewBadPathResolution(path string, resolved string) *BadPathResolutionError {
+	return &BadPathResolutionError{path, resolved}
+}
+
+// Determines if the given error is a bad path resolution error.
+func IsBadPathResolutionError(err error) bool {
+	e := errors.Unwrap(err)
+	if e == nil {
+		e = err
+	}
+
+	if _, ok := e.(*BadPathResolutionError); ok {
+		return true
+	}
+
+	return false
+}
+
+// Generates an error logger instance with some basic information.
+func (fs *Filesystem) error(err error) *log.Entry {
+	return log.WithField("subsystem", "filesystem").WithField("root", fs.root).WithField("error", err)
+}
+
+// Handle errors encountered when walking through directories.
+//
+// If there is a path resolution error just skip the item entirely. Only return this for a
+// directory, otherwise return nil. Returning this error for a file will stop the walking
+// for the remainder of the directory. This is assuming an os.FileInfo struct was even returned.
+func (fs *Filesystem) handleWalkerError(err error, f os.FileInfo) error {
+	if !IsBadPathResolutionError(err) {
+		return errors.WithStackIf(err)
+	}
+
+	if f != nil && f.IsDir() {
+		return filepath.SkipDir
+	}
+
+	return nil
+}

server/filesystem/errors_test.go

@@ -0,0 +1,24 @@
+package filesystem
+
+import (
+	. "github.com/franela/goblin"
+	"testing"
+)
+
+func TestFilesystem_PathResolutionError(t *testing.T) {
+	g := Goblin(t)
+
+	g.Describe("NewBadPathResolutionError", func() {
+		g.It("is can detect itself as an error correctly", func() {
+			err := NewBadPathResolution("foo", "bar")
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+			g.Assert(err.Error()).Equal("filesystem: server path [foo] resolves to a location outside the server root: bar")
+			g.Assert(IsBadPathResolutionError(ErrIsDirectory)).IsFalse()
+		})
+
+		g.It("returns <empty> if no destination path is provided", func() {
+			err := NewBadPathResolution("foo", "")
+			g.Assert(err.Error()).Equal("filesystem: server path [foo] resolves to a location outside the server root: <empty>")
+		})
+	})
+}

server/filesystem/filesystem.go

@@ -0,0 +1,464 @@
+package filesystem
+
+import (
+	"bufio"
+	"emperror.dev/errors"
+	"github.com/gabriel-vasile/mimetype"
+	"github.com/karrick/godirwalk"
+	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/system"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+type Filesystem struct {
+	mu                sync.RWMutex
+	lastLookupTime    *usageLookupTime
+	lookupInProgress  system.AtomicBool
+	diskUsed          int64
+	diskCheckInterval time.Duration
+
+	// The maximum amount of disk space (in bytes) that this Filesystem instance can use.
+	diskLimit int64
+
+	// The root data directory path for this Filesystem instance.
+	root string
+
+	isTest bool
+}
+
+// Creates a new Filesystem instance for a given server.
+func New(root string, size int64) *Filesystem {
+	return &Filesystem{
+		root:              root,
+		diskLimit:         size,
+		diskCheckInterval: time.Duration(config.Get().System.DiskCheckInterval),
+		lastLookupTime:    &usageLookupTime{},
+	}
+}
+
+// Returns the root path for the Filesystem instance.
+func (fs *Filesystem) Path() string {
+	return fs.root
+}
+
+// Reads a file on the system and returns it as a byte representation in a file
+// reader. This is not the most memory efficient usage since it will be reading the
+// entirety of the file into memory.
+func (fs *Filesystem) Readfile(p string, w io.Writer) error {
+	cleaned, err := fs.SafePath(p)
+	if err != nil {
+		return err
+	}
+
+	if st, err := os.Stat(cleaned); err != nil {
+		return errors.WithStack(err)
+	} else if st.IsDir() {
+		return errors.WithStack(ErrIsDirectory)
+	}
+
+	f, err := os.Open(cleaned)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	defer f.Close()
+
+	_, err = bufio.NewReader(f).WriteTo(w)
+
+	return errors.WithStack(err)
+}
+
+// Writes a file to the system. If the file does not already exist one will be created.
+func (fs *Filesystem) Writefile(p string, r io.Reader) error {
+	cleaned, err := fs.SafePath(p)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	var currentSize int64
+	// If the file does not exist on the system already go ahead and create the pathway
+	// to it and an empty file. We'll then write to it later on after this completes.
+	if stat, err := os.Stat(cleaned); err != nil {
+		if !os.IsNotExist(err) {
+			return errors.WithStackIf(err)
+		}
+
+		if err := os.MkdirAll(filepath.Dir(cleaned), 0755); err != nil {
+			return errors.WithStackIf(err)
+		}
+
+		if err := fs.Chown(filepath.Dir(cleaned)); err != nil {
+			return errors.WithStackIf(err)
+		}
+	} else {
+		if stat.IsDir() {
+			return errors.WithStack(ErrIsDirectory)
+		}
+
+		currentSize = stat.Size()
+	}
+
+	br := bufio.NewReader(r)
+	// Check that the new size we're writing to the disk can fit. If there is currently a file
+	// we'll subtract that current file size from the size of the buffer to determine the amount
+	// of new data we're writing (or amount we're removing if smaller).
+	if err := fs.hasSpaceFor(int64(br.Size()) - currentSize); err != nil {
+		return err
+	}
+
+	o := &fileOpener{}
+	// This will either create the file if it does not already exist, or open and
+	// truncate the existing file.
+	file, err := o.open(cleaned, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+	defer file.Close()
+
+	buf := make([]byte, 1024*4)
+	sz, err := io.CopyBuffer(file, r, buf)
+
+	// Adjust the disk usage to account for the old size and the new size of the file.
+	fs.addDisk(sz - currentSize)
+
+	// Finally, chown the file to ensure the permissions don't end up out-of-whack
+	// if we had just created it.
+	return fs.Chown(cleaned)
+}
+
+// Creates a new directory (name) at a specified path (p) for the server.
+func (fs *Filesystem) CreateDirectory(name string, p string) error {
+	cleaned, err := fs.SafePath(path.Join(p, name))
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	return os.MkdirAll(cleaned, 0755)
+}
+
+// Moves (or renames) a file or directory.
+func (fs *Filesystem) Rename(from string, to string) error {
+	cleanedFrom, err := fs.SafePath(from)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	cleanedTo, err := fs.SafePath(to)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	// If the target file or directory already exists the rename function will fail, so just
+	// bail out now.
+	if _, err := os.Stat(cleanedTo); err == nil {
+		return os.ErrExist
+	}
+
+	if cleanedTo == fs.Path() {
+		return errors.New("attempting to rename into an invalid directory space")
+	}
+
+	d := strings.TrimSuffix(cleanedTo, path.Base(cleanedTo))
+	// Ensure that the directory we're moving into exists correctly on the system. Only do this if
+	// we're not at the root directory level.
+	if d != fs.Path() {
+		if mkerr := os.MkdirAll(d, 0755); mkerr != nil {
+			return errors.WrapIf(mkerr, "failed to create directory structure for file rename")
+		}
+	}
+
+	return os.Rename(cleanedFrom, cleanedTo)
+}
+
+// Recursively iterates over a file or directory and sets the permissions on all of the
+// underlying files. Iterate over all of the files and directories. If it is a file just
+// go ahead and perform the chown operation. Otherwise dig deeper into the directory until
+// we've run out of directories to dig into.
+func (fs *Filesystem) Chown(path string) error {
+	cleaned, err := fs.SafePath(path)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	if fs.isTest {
+		return nil
+	}
+
+	uid := config.Get().System.User.Uid
+	gid := config.Get().System.User.Gid
+
+	// Start by just chowning the initial path that we received.
+	if err := os.Chown(cleaned, uid, gid); err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	// If this is not a directory we can now return from the function, there is nothing
+	// left that we need to do.
+	if st, _ := os.Stat(cleaned); !st.IsDir() {
+		return nil
+	}
+
+	// If this was a directory, begin walking over its contents recursively and ensure that all
+	// of the subfiles and directories get their permissions updated as well.
+	return godirwalk.Walk(cleaned, &godirwalk.Options{
+		Unsorted: true,
+		Callback: func(p string, e *godirwalk.Dirent) error {
+			// Do not attempt to chmod a symlink. Go's os.Chown function will affect the symlink
+			// so if it points to a location outside the data directory the user would be able to
+			// (un)intentionally modify that files permissions.
+			if e.IsSymlink() {
+				if e.IsDir() {
+					return godirwalk.SkipThis
+				}
+
+				return nil
+			}
+
+			return os.Chown(p, uid, gid)
+		},
+	})
+}
+
+// Begin looping up to 50 times to try and create a unique copy file name. This will take
+// an input of "file.txt" and generate "file copy.txt". If that name is already taken, it will
+// then try to write "file copy 2.txt" and so on, until reaching 50 loops. At that point we
+// won't waste anymore time, just use the current timestamp and make that copy.
+//
+// Could probably make this more efficient by checking if there are any files matching the copy
+// pattern, and trying to find the highest number and then incrementing it by one rather than
+// looping endlessly.
+func (fs *Filesystem) findCopySuffix(dir string, name string, extension string) (string, error) {
+	var i int
+	var suffix = " copy"
+
+	for i = 0; i < 51; i++ {
+		if i > 0 {
+			suffix = " copy " + strconv.Itoa(i)
+		}
+
+		n := name + suffix + extension
+		// If we stat the file and it does not exist that means we're good to create the copy. If it
+		// does exist, we'll just continue to the next loop and try again.
+		if _, err := fs.Stat(path.Join(dir, n)); err != nil {
+			if !errors.Is(err, os.ErrNotExist) {
+				return "", errors.WithStackIf(err)
+			}
+
+			break
+		}
+
+		if i == 50 {
+			suffix = "copy." + time.Now().Format(time.RFC3339)
+		}
+	}
+
+	return name + suffix + extension, nil
+}
+
+// Copies a given file to the same location and appends a suffix to the file to indicate that
+// it has been copied.
+func (fs *Filesystem) Copy(p string) error {
+	cleaned, err := fs.SafePath(p)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	s, err := os.Stat(cleaned)
+	if err != nil {
+		return errors.WithStackIf(err)
+	} else if s.IsDir() || !s.Mode().IsRegular() {
+		// If this is a directory or not a regular file, just throw a not-exist error
+		// since anything calling this function should understand what that means.
+		return os.ErrNotExist
+	}
+
+	// Check that copying this file wouldn't put the server over its limit.
+	if err := fs.hasSpaceFor(s.Size()); err != nil {
+		return err
+	}
+
+	base := filepath.Base(cleaned)
+	relative := strings.TrimSuffix(strings.TrimPrefix(cleaned, fs.Path()), base)
+	extension := filepath.Ext(base)
+	name := strings.TrimSuffix(base, extension)
+
+	// Ensure that ".tar" is also counted as apart of the file extension.
+	// There might be a better way to handle this for other double file extensions,
+	// but this is a good workaround for now.
+	if strings.HasSuffix(name, ".tar") {
+		extension = ".tar" + extension
+		name = strings.TrimSuffix(name, ".tar")
+	}
+
+	source, err := os.Open(cleaned)
+	if err != nil {
+		return errors.WithStackIf(err)
+	}
+	defer source.Close()
+
+	n, err := fs.findCopySuffix(relative, name, extension)
+	if err != nil {
+		return err
+	}
+
+	return fs.Writefile(path.Join(relative, n), source)
+}
+
+// Deletes a file or folder from the system. Prevents the user from accidentally
+// (or maliciously) removing their root server data directory.
+func (fs *Filesystem) Delete(p string) error {
+	wg := sync.WaitGroup{}
+	// This is one of the few (only?) places in the codebase where we're explicitly not using
+	// the SafePath functionality when working with user provided input. If we did, you would
+	// not be able to delete a file that is a symlink pointing to a location outside of the data
+	// directory.
+	//
+	// We also want to avoid resolving a symlink that points _within_ the data directory and thus
+	// deleting the actual source file for the symlink rather than the symlink itself. For these
+	// purposes just resolve the actual file path using filepath.Join() and confirm that the path
+	// exists within the data directory.
+	resolved := fs.unsafeFilePath(p)
+	if !fs.unsafeIsInDataDirectory(resolved) {
+		return NewBadPathResolution(p, resolved)
+	}
+
+	// Block any whoopsies.
+	if resolved == fs.Path() {
+		return errors.New("cannot delete root server directory")
+	}
+
+	if st, err := os.Lstat(resolved); err != nil {
+		if !os.IsNotExist(err) {
+			fs.error(err).Warn("error while attempting to stat file before deletion")
+		}
+	} else {
+		if !st.IsDir() {
+			fs.addDisk(-st.Size())
+		} else {
+			wg.Add(1)
+			go func(wg *sync.WaitGroup, st os.FileInfo, resolved string) {
+				defer wg.Done()
+				if s, err := fs.DirectorySize(resolved); err == nil {
+					fs.addDisk(-s)
+				}
+			}(&wg, st, resolved)
+		}
+	}
+
+	wg.Wait()
+
+	return os.RemoveAll(resolved)
+}
+
+type fileOpener struct {
+	busy uint
+}
+
+// Attempts to open a given file up to "attempts" number of times, using a backoff. If the file
+// cannot be opened because of a "text file busy" error, we will attempt until the number of attempts
+// has been exhaused, at which point we will abort with an error.
+func (fo *fileOpener) open(path string, flags int, perm os.FileMode) (*os.File, error) {
+	for {
+		f, err := os.OpenFile(path, flags, perm)
+
+		// If there is an error because the text file is busy, go ahead and sleep for a few
+		// hundred milliseconds and then try again up to three times before just returning the
+		// error back to the caller.
+		//
+		// Based on code from: https://github.com/golang/go/issues/22220#issuecomment-336458122
+		if err != nil && fo.busy < 3 && strings.Contains(err.Error(), "text file busy") {
+			time.Sleep(100 * time.Millisecond << fo.busy)
+			fo.busy++
+			continue
+		}
+
+		return f, err
+	}
+}
+
+// Lists the contents of a given directory and returns stat information about each
+// file and folder within it.
+func (fs *Filesystem) ListDirectory(p string) ([]*Stat, error) {
+	cleaned, err := fs.SafePath(p)
+	if err != nil {
+		return nil, err
+	}
+
+	files, err := ioutil.ReadDir(cleaned)
+	if err != nil {
+		return nil, err
+	}
+
+	var wg sync.WaitGroup
+
+	// You must initialize the output of this directory as a non-nil value otherwise
+	// when it is marshaled into a JSON object you'll just get 'null' back, which will
+	// break the panel badly.
+	out := make([]*Stat, len(files))
+
+	// Iterate over all of the files and directories returned and perform an async process
+	// to get the mime-type for them all.
+	for i, file := range files {
+		wg.Add(1)
+
+		go func(idx int, f os.FileInfo) {
+			defer wg.Done()
+
+			var m *mimetype.MIME
+			var d = "inode/directory"
+			if !f.IsDir() {
+				cleanedp := filepath.Join(cleaned, f.Name())
+				if f.Mode()&os.ModeSymlink != 0 {
+					cleanedp, _ = fs.SafePath(filepath.Join(cleaned, f.Name()))
+				}
+
+				if cleanedp != "" {
+					m, _ = mimetype.DetectFile(filepath.Join(cleaned, f.Name()))
+				} else {
+					// Just pass this for an unknown type because the file could not safely be resolved within
+					// the server data path.
+					d = "application/octet-stream"
+				}
+			}
+
+			st := &Stat{
+				Info:     f,
+				Mimetype: d,
+			}
+
+			if m != nil {
+				st.Mimetype = m.String()
+			}
+
+			out[idx] = st
+		}(i, file)
+	}
+
+	wg.Wait()
+
+	// Sort the output alphabetically to begin with since we've run the output
+	// through an asynchronous process and the order is gonna be very random.
+	sort.SliceStable(out, func(i, j int) bool {
+		if out[i].Info.Name() == out[j].Info.Name() || out[i].Info.Name() > out[j].Info.Name() {
+			return true
+		}
+
+		return false
+	})
+
+	// Then, sort it so that directories are listed first in the output. Everything
+	// will continue to be alphabetized at this point.
+	sort.SliceStable(out, func(i, j int) bool {
+		return out[i].Info.IsDir()
+	})
+
+	return out, nil
+}

server/filesystem/filesystem_test.go

@@ -0,0 +1,570 @@
+package filesystem
+
+import (
+	"bytes"
+	"errors"
+	. "github.com/franela/goblin"
+	"github.com/pterodactyl/wings/config"
+	"io/ioutil"
+	"math/rand"
+	"os"
+	"path/filepath"
+	"sync/atomic"
+	"testing"
+	"unicode/utf8"
+)
+
+func NewFs() (*Filesystem, *rootFs) {
+	config.Set(&config.Configuration{
+		AuthenticationToken: "abc",
+		System: config.SystemConfiguration{
+			RootDirectory:     "/server",
+			DiskCheckInterval: 150,
+		},
+	})
+
+	tmpDir, err := ioutil.TempDir(os.TempDir(), "pterodactyl")
+	if err != nil {
+		panic(err)
+	}
+	// defer os.RemoveAll(tmpDir)
+
+	rfs := rootFs{root: tmpDir}
+
+	rfs.reset()
+
+	fs := New(filepath.Join(tmpDir, "/server"), 0)
+	fs.isTest = true
+
+	return fs, &rfs
+}
+
+type rootFs struct {
+	root string
+}
+
+func (rfs *rootFs) CreateServerFile(p string, c string) error {
+	f, err := os.Create(filepath.Join(rfs.root, "/server", p))
+
+	if err == nil {
+		f.Write([]byte(c))
+		f.Close()
+	}
+
+	return err
+}
+
+func (rfs *rootFs) StatServerFile(p string) (os.FileInfo, error) {
+	return os.Stat(filepath.Join(rfs.root, "/server", p))
+}
+
+func (rfs *rootFs) reset() {
+	if err := os.RemoveAll(filepath.Join(rfs.root, "/server")); err != nil {
+		if !os.IsNotExist(err) {
+			panic(err)
+		}
+	}
+
+	if err := os.Mkdir(filepath.Join(rfs.root, "/server"), 0755); err != nil {
+		panic(err)
+	}
+}
+
+func TestFilesystem_Readfile(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Readfile", func() {
+		buf := &bytes.Buffer{}
+
+		g.It("opens a file if it exists on the system", func() {
+			err := rfs.CreateServerFile("test.txt", "testing")
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("test.txt", buf)
+			g.Assert(err).IsNil()
+			g.Assert(buf.String()).Equal("testing")
+		})
+
+		g.It("returns an error if the file does not exist", func() {
+			err := fs.Readfile("test.txt", buf)
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+		})
+
+		g.It("returns an error if the \"file\" is a directory", func() {
+			err := os.Mkdir(filepath.Join(rfs.root, "/server/test.txt"), 0755)
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("test.txt", buf)
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, ErrIsDirectory)).IsTrue()
+		})
+
+		g.It("cannot open a file outside the root directory", func() {
+			err := rfs.CreateServerFile("/../test.txt", "testing")
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("/../test.txt", buf)
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.AfterEach(func() {
+			buf.Truncate(0)
+			atomic.StoreInt64(&fs.diskUsed, 0)
+			rfs.reset()
+		})
+	})
+}
+
+func TestFilesystem_Writefile(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Open and WriteFile", func() {
+		buf := &bytes.Buffer{}
+
+		// Test that a file can be written to the disk and that the disk space used as a result
+		// is updated correctly in the end.
+		g.It("can create a new file", func() {
+			r := bytes.NewReader([]byte("test file content"))
+
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(0))
+
+			err := fs.Writefile("test.txt", r)
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("test.txt", buf)
+			g.Assert(err).IsNil()
+			g.Assert(buf.String()).Equal("test file content")
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(r.Size())
+		})
+
+		g.It("can create a new file inside a nested directory with leading slash", func() {
+			r := bytes.NewReader([]byte("test file content"))
+
+			err := fs.Writefile("/some/nested/test.txt", r)
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("/some/nested/test.txt", buf)
+			g.Assert(err).IsNil()
+			g.Assert(buf.String()).Equal("test file content")
+		})
+
+		g.It("can create a new file inside a nested directory without a trailing slash", func() {
+			r := bytes.NewReader([]byte("test file content"))
+
+			err := fs.Writefile("some/../foo/bar/test.txt", r)
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("foo/bar/test.txt", buf)
+			g.Assert(err).IsNil()
+			g.Assert(buf.String()).Equal("test file content")
+		})
+
+		g.It("cannot create a file outside the root directory", func() {
+			r := bytes.NewReader([]byte("test file content"))
+
+			err := fs.Writefile("/some/../foo/../../test.txt", r)
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot write a file that exceeds the disk limits", func() {
+			atomic.StoreInt64(&fs.diskLimit, 1024)
+
+			b := make([]byte, 1025)
+			_, err := rand.Read(b)
+			g.Assert(err).IsNil()
+			g.Assert(len(b)).Equal(1025)
+
+			r := bytes.NewReader(b)
+			err = fs.Writefile("test.txt", r)
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, ErrNotEnoughDiskSpace)).IsTrue()
+		})
+
+		/*g.It("updates the total space used when a file is appended to", func() {
+			atomic.StoreInt64(&fs.diskUsed, 100)
+
+			b := make([]byte, 100)
+			_, _ = rand.Read(b)
+
+			r := bytes.NewReader(b)
+			err := fs.Writefile("test.txt", r)
+			g.Assert(err).IsNil()
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(200))
+
+			// If we write less data than already exists, we should expect the total
+			// disk used to be decremented.
+			b = make([]byte, 50)
+			_, _ = rand.Read(b)
+
+			r = bytes.NewReader(b)
+			err = fs.Writefile("test.txt", r)
+			g.Assert(err).IsNil()
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(150))
+		})*/
+
+		g.It("truncates the file when writing new contents", func() {
+			r := bytes.NewReader([]byte("original data"))
+			err := fs.Writefile("test.txt", r)
+			g.Assert(err).IsNil()
+
+			r = bytes.NewReader([]byte("new data"))
+			err = fs.Writefile("test.txt", r)
+			g.Assert(err).IsNil()
+
+			err = fs.Readfile("test.txt", buf)
+			g.Assert(err).IsNil()
+			g.Assert(buf.String()).Equal("new data")
+		})
+
+		g.AfterEach(func() {
+			buf.Truncate(0)
+			rfs.reset()
+
+			atomic.StoreInt64(&fs.diskUsed, 0)
+			atomic.StoreInt64(&fs.diskLimit, 0)
+		})
+	})
+}
+
+func TestFilesystem_CreateDirectory(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("CreateDirectory", func() {
+		g.It("should create missing directories automatically", func() {
+			err := fs.CreateDirectory("test", "foo/bar/baz")
+			g.Assert(err).IsNil()
+
+			st, err := rfs.StatServerFile("foo/bar/baz/test")
+			g.Assert(err).IsNil()
+			g.Assert(st.IsDir()).IsTrue()
+			g.Assert(st.Name()).Equal("test")
+		})
+
+		g.It("should work with leading and trailing slashes", func() {
+			err := fs.CreateDirectory("test", "/foozie/barzie/bazzy/")
+			g.Assert(err).IsNil()
+
+			st, err := rfs.StatServerFile("foozie/barzie/bazzy/test")
+			g.Assert(err).IsNil()
+			g.Assert(st.IsDir()).IsTrue()
+			g.Assert(st.Name()).Equal("test")
+		})
+
+		g.It("should not allow the creation of directories outside the root", func() {
+			err := fs.CreateDirectory("test", "e/../../something")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("should not increment the disk usage", func() {
+			err := fs.CreateDirectory("test", "/")
+			g.Assert(err).IsNil()
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(0))
+		})
+
+		g.AfterEach(func() {
+			rfs.reset()
+		})
+	})
+}
+
+func TestFilesystem_Rename(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Rename", func() {
+		g.BeforeEach(func() {
+			if err := rfs.CreateServerFile("source.txt", "text content"); err != nil {
+				panic(err)
+			}
+		})
+
+		g.It("returns an error if the target already exists", func() {
+			err := rfs.CreateServerFile("target.txt", "taget content")
+			g.Assert(err).IsNil()
+
+			err = fs.Rename("source.txt", "target.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrExist)).IsTrue()
+		})
+
+		g.It("returns an error if the final destination is the root directory", func() {
+			err := fs.Rename("source.txt", "/")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrExist)).IsTrue()
+		})
+
+		g.It("returns an error if the source destination is the root directory", func() {
+			err := fs.Rename("source.txt", "/")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrExist)).IsTrue()
+		})
+
+		g.It("does not allow renaming to a location outside the root", func() {
+			err := fs.Rename("source.txt", "../target.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("does not allow renaming from a location outside the root", func() {
+			err := rfs.CreateServerFile("/../ext-source.txt", "taget content")
+
+			err = fs.Rename("/../ext-source.txt", "target.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("allows a file to be renamed", func() {
+			err := fs.Rename("source.txt", "target.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+
+			st, err := rfs.StatServerFile("target.txt")
+			g.Assert(err).IsNil()
+			g.Assert(st.Name()).Equal("target.txt")
+			g.Assert(st.Size()).IsNotZero()
+		})
+
+		g.It("allows a folder to be renamed", func() {
+			err := os.Mkdir(filepath.Join(rfs.root, "/server/source_dir"), 0755)
+			g.Assert(err).IsNil()
+
+			err = fs.Rename("source_dir", "target_dir")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("source_dir")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+
+			st, err := rfs.StatServerFile("target_dir")
+			g.Assert(err).IsNil()
+			g.Assert(st.IsDir()).IsTrue()
+		})
+
+		g.It("returns an error if the source does not exist", func() {
+			err := fs.Rename("missing.txt", "target.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+		})
+
+		g.It("creates directories if they are missing", func() {
+			err := fs.Rename("source.txt", "nested/folder/target.txt")
+			g.Assert(err).IsNil()
+
+			st, err := rfs.StatServerFile("nested/folder/target.txt")
+			g.Assert(err).IsNil()
+			g.Assert(st.Name()).Equal("target.txt")
+		})
+
+		g.AfterEach(func() {
+			rfs.reset()
+		})
+	})
+}
+
+func TestFilesystem_Copy(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Copy", func() {
+		g.BeforeEach(func() {
+			if err := rfs.CreateServerFile("source.txt", "text content"); err != nil {
+				panic(err)
+			}
+
+			atomic.StoreInt64(&fs.diskUsed, int64(utf8.RuneCountInString("test content")))
+		})
+
+		g.It("should return an error if the source does not exist", func() {
+			err := fs.Copy("foo.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+		})
+
+		g.It("should return an error if the source is outside the root", func() {
+			err := rfs.CreateServerFile("/../ext-source.txt", "text content")
+
+			err = fs.Copy("../ext-source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("should return an error if the source directory is outside the root", func() {
+			err := os.MkdirAll(filepath.Join(rfs.root, "/nested/in/dir"), 0755)
+			g.Assert(err).IsNil()
+
+			err = rfs.CreateServerFile("/../nested/in/dir/ext-source.txt", "external content")
+			g.Assert(err).IsNil()
+
+			err = fs.Copy("../nested/in/dir/ext-source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+
+			err = fs.Copy("nested/in/../../../nested/in/dir/ext-source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("should return an error if the source is a directory", func() {
+			err := os.Mkdir(filepath.Join(rfs.root, "/server/dir"), 0755)
+			g.Assert(err).IsNil()
+
+			err = fs.Copy("dir")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+		})
+
+		g.It("should return an error if there is not space to copy the file", func() {
+			atomic.StoreInt64(&fs.diskLimit, 2)
+
+			err := fs.Copy("source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, ErrNotEnoughDiskSpace)).IsTrue()
+		})
+
+		g.It("should create a copy of the file and increment the disk used", func() {
+			err := fs.Copy("source.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("source.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("source copy.txt")
+			g.Assert(err).IsNil()
+		})
+
+		g.It("should create a copy of the file with a suffix if a copy already exists", func() {
+			err := fs.Copy("source.txt")
+			g.Assert(err).IsNil()
+
+			err = fs.Copy("source.txt")
+			g.Assert(err).IsNil()
+
+			r := []string{"source.txt", "source copy.txt", "source copy 1.txt"}
+
+			for _, name := range r {
+				_, err = rfs.StatServerFile(name)
+				g.Assert(err).IsNil()
+			}
+
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(utf8.RuneCountInString("test content")) * 3)
+		})
+
+		g.It("should create a copy inside of a directory", func() {
+			err := os.MkdirAll(filepath.Join(rfs.root, "/server/nested/in/dir"), 0755)
+			g.Assert(err).IsNil()
+
+			err = rfs.CreateServerFile("nested/in/dir/source.txt", "test content")
+			g.Assert(err).IsNil()
+
+			err = fs.Copy("nested/in/dir/source.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("nested/in/dir/source.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("nested/in/dir/source copy.txt")
+			g.Assert(err).IsNil()
+		})
+
+		g.AfterEach(func() {
+			rfs.reset()
+
+			atomic.StoreInt64(&fs.diskUsed, 0)
+			atomic.StoreInt64(&fs.diskLimit, 0)
+		})
+	})
+}
+
+func TestFilesystem_Delete(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Delete", func() {
+		g.BeforeEach(func() {
+			if err := rfs.CreateServerFile("source.txt", "test content"); err != nil {
+				panic(err)
+			}
+
+			atomic.StoreInt64(&fs.diskUsed, int64(utf8.RuneCountInString("test content")))
+		})
+
+		g.It("does not delete files outside the root directory", func() {
+			err := rfs.CreateServerFile("/../ext-source.txt", "external content")
+
+			err = fs.Delete("../ext-source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("does not allow the deletion of the root directory", func() {
+			err := fs.Delete("/")
+			g.Assert(err).IsNotNil()
+			g.Assert(err.Error()).Equal("cannot delete root server directory")
+		})
+
+		g.It("does not return an error if the target does not exist", func() {
+			err := fs.Delete("missing.txt")
+			g.Assert(err).IsNil()
+
+			st, err := rfs.StatServerFile("source.txt")
+			g.Assert(err).IsNil()
+			g.Assert(st.Name()).Equal("source.txt")
+		})
+
+		g.It("deletes files and subtracts their size from the disk usage", func() {
+			err := fs.Delete("source.txt")
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("source.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(0))
+		})
+
+		g.It("deletes all items inside a directory if the directory is deleted", func() {
+			sources := []string{
+				"foo/source.txt",
+				"foo/bar/source.txt",
+				"foo/bar/baz/source.txt",
+			}
+
+			err := os.MkdirAll(filepath.Join(rfs.root, "/server/foo/bar/baz"), 0755)
+			g.Assert(err).IsNil()
+
+			for _, s := range sources {
+				err = rfs.CreateServerFile(s, "test content")
+				g.Assert(err).IsNil()
+			}
+
+			atomic.StoreInt64(&fs.diskUsed, int64(utf8.RuneCountInString("test content")*3))
+
+			err = fs.Delete("foo")
+			g.Assert(err).IsNil()
+			g.Assert(atomic.LoadInt64(&fs.diskUsed)).Equal(int64(0))
+
+			for _, s := range sources {
+				_, err = rfs.StatServerFile(s)
+				g.Assert(err).IsNotNil()
+				g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+			}
+		})
+
+		g.AfterEach(func() {
+			rfs.reset()
+
+			atomic.StoreInt64(&fs.diskUsed, 0)
+			atomic.StoreInt64(&fs.diskLimit, 0)
+		})
+	})
+}

server/filesystem/path.go

@@ -0,0 +1,142 @@
+package filesystem
+
+import (
+	"context"
+	"emperror.dev/errors"
+	"golang.org/x/sync/errgroup"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+)
+
+// Normalizes a directory being passed in to ensure the user is not able to escape
+// from their data directory. After normalization if the directory is still within their home
+// path it is returned. If they managed to "escape" an error will be returned.
+//
+// This logic is actually copied over from the SFTP server code. Ideally that eventually
+// either gets ported into this application, or is able to make use of this package.
+func (fs *Filesystem) SafePath(p string) (string, error) {
+	var nonExistentPathResolution string
+
+	// Start with a cleaned up path before checking the more complex bits.
+	r := fs.unsafeFilePath(p)
+
+	// At the same time, evaluate the symlink status and determine where this file or folder
+	// is truly pointing to.
+	ep, err := filepath.EvalSymlinks(r)
+	if err != nil && !os.IsNotExist(err) {
+		return "", errors.WithStackIf(err)
+	} else if os.IsNotExist(err) {
+		// The requested directory doesn't exist, so at this point we need to iterate up the
+		// path chain until we hit a directory that _does_ exist and can be validated.
+		parts := strings.Split(filepath.Dir(r), "/")
+
+		var try string
+		// Range over all of the path parts and form directory pathings from the end
+		// moving up until we have a valid resolution or we run out of paths to try.
+		for k := range parts {
+			try = strings.Join(parts[:(len(parts)-k)], "/")
+
+			if !fs.unsafeIsInDataDirectory(try) {
+				break
+			}
+
+			t, err := filepath.EvalSymlinks(try)
+			if err == nil {
+				nonExistentPathResolution = t
+				break
+			}
+		}
+	}
+
+	// If the new path doesn't start with their root directory there is clearly an escape
+	// attempt going on, and we should NOT resolve this path for them.
+	if nonExistentPathResolution != "" {
+		if !fs.unsafeIsInDataDirectory(nonExistentPathResolution) {
+			return "", NewBadPathResolution(p, nonExistentPathResolution)
+		}
+
+		// If the nonExistentPathResolution variable is not empty then the initial path requested
+		// did not exist and we looped through the pathway until we found a match. At this point
+		// we've confirmed the first matched pathway exists in the root server directory, so we
+		// can go ahead and just return the path that was requested initially.
+		return r, nil
+	}
+
+	// If the requested directory from EvalSymlinks begins with the server root directory go
+	// ahead and return it. If not we'll return an error which will block any further action
+	// on the file.
+	if fs.unsafeIsInDataDirectory(ep) {
+		return ep, nil
+	}
+
+	return "", NewBadPathResolution(p, r)
+}
+
+// Generate a path to the file by cleaning it up and appending the root server path to it. This
+// DOES NOT guarantee that the file resolves within the server data directory. You'll want to use
+// the fs.unsafeIsInDataDirectory(p) function to confirm.
+func (fs *Filesystem) unsafeFilePath(p string) string {
+	// Calling filepath.Clean on the joined directory will resolve it to the absolute path,
+	// removing any ../ type of resolution arguments, and leaving us with a direct path link.
+	//
+	// This will also trim the existing root path off the beginning of the path passed to
+	// the function since that can get a bit messy.
+	return filepath.Clean(filepath.Join(fs.Path(), strings.TrimPrefix(p, fs.Path())))
+}
+
+// Check that that path string starts with the server data directory path. This function DOES NOT
+// validate that the rest of the path does not end up resolving out of this directory, or that the
+// targeted file or folder is not a symlink doing the same thing.
+func (fs *Filesystem) unsafeIsInDataDirectory(p string) bool {
+	return strings.HasPrefix(strings.TrimSuffix(p, "/")+"/", strings.TrimSuffix(fs.Path(), "/")+"/")
+}
+
+// Executes the fs.SafePath function in parallel against an array of paths. If any of the calls
+// fails an error will be returned.
+func (fs *Filesystem) ParallelSafePath(paths []string) ([]string, error) {
+	var cleaned []string
+
+	// Simple locker function to avoid racy appends to the array of cleaned paths.
+	var m = new(sync.Mutex)
+	var push = func(c string) {
+		m.Lock()
+		cleaned = append(cleaned, c)
+		m.Unlock()
+	}
+
+	// Create an error group that we can use to run processes in parallel while retaining
+	// the ability to cancel the entire process immediately should any of it fail.
+	g, ctx := errgroup.WithContext(context.Background())
+
+	// Iterate over all of the paths and generate a cleaned path, if there is an error for any
+	// of the files, abort the process.
+	for _, p := range paths {
+		// Create copy so we can use it within the goroutine correctly.
+		pi := p
+
+		// Recursively call this function to continue digging through the directory tree within
+		// a separate goroutine. If the context is canceled abort this process.
+		g.Go(func() error {
+			select {
+			case <-ctx.Done():
+				return ctx.Err()
+			default:
+				// If the callback returns true, go ahead and keep walking deeper. This allows
+				// us to programmatically continue deeper into directories, or stop digging
+				// if that pathway knows it needs nothing else.
+				if c, err := fs.SafePath(pi); err != nil {
+					return err
+				} else {
+					push(c)
+				}
+
+				return nil
+			}
+		})
+	}
+
+	// Block until all of the routines finish and have returned a value.
+	return cleaned, errors.WithStackIf(g.Wait())
+}

server/filesystem/path_test.go

@@ -0,0 +1,228 @@
+package filesystem
+
+import (
+	"bytes"
+	"emperror.dev/errors"
+	. "github.com/franela/goblin"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestFilesystem_Path(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	g.Describe("Path", func() {
+		g.It("returns the root path for the instance", func() {
+			g.Assert(fs.Path()).Equal(filepath.Join(rfs.root, "/server"))
+		})
+	})
+}
+
+func TestFilesystem_SafePath(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+	prefix := filepath.Join(rfs.root, "/server")
+
+	g.Describe("SafePath", func() {
+		g.It("returns a cleaned path to a given file", func() {
+			p, err := fs.SafePath("test.txt")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/test.txt")
+
+			p, err = fs.SafePath("/test.txt")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/test.txt")
+
+			p, err = fs.SafePath("./test.txt")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/test.txt")
+
+			p, err = fs.SafePath("/foo/../test.txt")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/test.txt")
+
+			p, err = fs.SafePath("/foo/bar")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/foo/bar")
+		})
+
+		g.It("handles root directory access", func() {
+			p, err := fs.SafePath("/")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix)
+
+			p, err = fs.SafePath("")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix)
+		})
+
+		g.It("removes trailing slashes from paths", func() {
+			p, err := fs.SafePath("/foo/bar/")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/foo/bar")
+		})
+
+		g.It("handles deeply nested directories that do not exist", func() {
+			p, err := fs.SafePath("/foo/bar/baz/quaz/../../ducks/testing.txt")
+			g.Assert(err).IsNil()
+			g.Assert(p).Equal(prefix + "/foo/bar/ducks/testing.txt")
+		})
+
+		g.It("blocks access to files outside the root directory", func() {
+			p, err := fs.SafePath("../test.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+			g.Assert(p).Equal("")
+
+			p, err = fs.SafePath("/../test.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+			g.Assert(p).Equal("")
+
+			p, err = fs.SafePath("./foo/../../test.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+			g.Assert(p).Equal("")
+
+			p, err = fs.SafePath("..")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+			g.Assert(p).Equal("")
+		})
+	})
+}
+
+// We test against accessing files outside the root directory in the tests, however it
+// is still possible for someone to mess up and not properly use this safe path call. In
+// order to truly confirm this, we'll try to pass in a symlinked malicious file to all of
+// the calls and ensure they all fail with the same reason.
+func TestFilesystem_Blocks_Symlinks(t *testing.T) {
+	g := Goblin(t)
+	fs, rfs := NewFs()
+
+	if err := rfs.CreateServerFile("/../malicious.txt", "external content"); err != nil {
+		panic(err)
+	}
+
+	if err := os.Mkdir(filepath.Join(rfs.root, "/malicious_dir"), 0777); err != nil {
+		panic(err)
+	}
+
+	if err := os.Symlink(filepath.Join(rfs.root, "malicious.txt"), filepath.Join(rfs.root, "/server/symlinked.txt")); err != nil {
+		panic(err)
+	}
+
+	if err := os.Symlink(filepath.Join(rfs.root, "/malicious_dir"), filepath.Join(rfs.root, "/server/external_dir")); err != nil {
+		panic(err)
+	}
+
+	g.Describe("Readfile", func() {
+		g.It("cannot read a file symlinked outside the root", func() {
+			b := bytes.Buffer{}
+
+			err := fs.Readfile("symlinked.txt", &b)
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("Writefile", func() {
+		g.It("cannot write to a file symlinked outside the root", func() {
+			r := bytes.NewReader([]byte("testing"))
+
+			err := fs.Writefile("symlinked.txt", r)
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot write a file to a directory symlinked outside the root", func() {
+			r := bytes.NewReader([]byte("testing"))
+
+			err := fs.Writefile("external_dir/foo.txt", r)
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("CreateDirectory", func() {
+		g.It("cannot create a directory outside the root", func() {
+			err := fs.CreateDirectory("my_dir", "external_dir")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot create a nested directory outside the root", func() {
+			err := fs.CreateDirectory("my/nested/dir", "external_dir/foo/bar")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot create a nested directory outside the root", func() {
+			err := fs.CreateDirectory("my/nested/dir", "external_dir/server")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("Rename", func() {
+		g.It("cannot rename a file symlinked outside the directory root", func() {
+			err := fs.Rename("symlinked.txt", "foo.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot rename a symlinked directory outside the root", func() {
+			err := fs.Rename("external_dir", "foo")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot rename a file to a location outside the directory root", func() {
+			rfs.CreateServerFile("my_file.txt", "internal content")
+
+			err := fs.Rename("my_file.txt", "external_dir/my_file.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("Chown", func() {
+		g.It("cannot chown a file symlinked outside the directory root", func() {
+			err := fs.Chown("symlinked.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+
+		g.It("cannot chown a directory symlinked outside the directory root", func() {
+			err := fs.Chown("external_dir")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("Copy", func() {
+		g.It("cannot copy a file symlinked outside the directory root", func() {
+			err := fs.Copy("symlinked.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(IsBadPathResolutionError(err)).IsTrue()
+		})
+	})
+
+	g.Describe("Delete", func() {
+		g.It("deletes the symlinked file but leaves the source", func() {
+			err := fs.Delete("symlinked.txt")
+			g.Assert(err).IsNil()
+
+			_, err = os.Stat(filepath.Join(rfs.root, "malicious.txt"))
+			g.Assert(err).IsNil()
+
+			_, err = rfs.StatServerFile("symlinked.txt")
+			g.Assert(err).IsNotNil()
+			g.Assert(errors.Is(err, os.ErrNotExist)).IsTrue()
+		})
+	})
+
+	rfs.reset()
+}

server/filesystem/stat.go

@@ -0,0 +1,75 @@
+package filesystem
+
+import (
+	"emperror.dev/errors"
+	"encoding/json"
+	"github.com/gabriel-vasile/mimetype"
+	"os"
+	"time"
+)
+
+type Stat struct {
+	Info     os.FileInfo
+	Mimetype string
+}
+
+func (s *Stat) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Name      string `json:"name"`
+		Created   string `json:"created"`
+		Modified  string `json:"modified"`
+		Mode      string `json:"mode"`
+		Size      int64  `json:"size"`
+		Directory bool   `json:"directory"`
+		File      bool   `json:"file"`
+		Symlink   bool   `json:"symlink"`
+		Mime      string `json:"mime"`
+	}{
+		Name:      s.Info.Name(),
+		Created:   s.CTime().Format(time.RFC3339),
+		Modified:  s.Info.ModTime().Format(time.RFC3339),
+		Mode:      s.Info.Mode().String(),
+		Size:      s.Info.Size(),
+		Directory: s.Info.IsDir(),
+		File:      !s.Info.IsDir(),
+		Symlink:   s.Info.Mode().Perm()&os.ModeSymlink != 0,
+		Mime:      s.Mimetype,
+	})
+}
+
+// Stats a file or folder and returns the base stat object from go along with the
+// MIME data that can be used for editing files.
+func (fs *Filesystem) Stat(p string) (*Stat, error) {
+	cleaned, err := fs.SafePath(p)
+	if err != nil {
+		return nil, err
+	}
+
+	return fs.unsafeStat(cleaned)
+}
+
+func (fs *Filesystem) unsafeStat(p string) (*Stat, error) {
+	s, err := os.Stat(p)
+	if err != nil {
+		return nil, errors.WithStackIf(err)
+	}
+
+	var m *mimetype.MIME
+	if !s.IsDir() {
+		m, err = mimetype.DetectFile(p)
+		if err != nil {
+			return nil, errors.WithStackIf(err)
+		}
+	}
+
+	st := &Stat{
+		Info:     s,
+		Mimetype: "inode/directory",
+	}
+
+	if m != nil {
+		st.Mimetype = m.String()
+	}
+
+	return st, nil
+}

server/filesystem/stat_darwin.go

@@ -1,4 +1,4 @@
-package server
+package filesystem
 
 import (
 	"syscall"
@@ -9,5 +9,5 @@ import (
 func (s *Stat) CTime() time.Time {
 	st := s.Info.Sys().(*syscall.Stat_t)
 
-	return time.Unix(int64(st.Ctim.Sec), int64(st.Ctim.Nsec))
+	return time.Unix(st.Ctimespec.Sec, st.Ctimespec.Nsec)
-}
+}

server/filesystem/stat_linux.go

@@ -0,0 +1,14 @@
+package filesystem
+
+import (
+	"syscall"
+	"time"
+)
+
+// Returns the time that the file/folder was created.
+func (s *Stat) CTime() time.Time {
+	st := s.Info.Sys().(*syscall.Stat_t)
+
+	// Do not remove these "redundant" type-casts, they are required for 32-bit builds to work.
+	return time.Unix(int64(st.Ctim.Sec), int64(st.Ctim.Nsec))
+}

server/filesystem/stat_windows.go

@@ -1,4 +1,4 @@
-package server
+package filesystem
 
 import (
 	"time"
@@ -9,4 +9,4 @@ import (
 // for right now.
 func (s *Stat) CTime() time.Time {
 	return s.Info.ModTime()
-}
+}

server/filesystem_darwin.go

@@ -1,13 +0,0 @@
-package server
-
-import (
-	"syscall"
-	"time"
-)
-
-// Returns the time that the file/folder was created.
-func (s *Stat) CTime() time.Time {
-	st := s.Info.Sys().(*syscall.Stat_t)
-
-	return time.Unix(int64(st.Ctimespec.Sec), int64(st.Ctimespec.Nsec))
-}

server/install.go

@@ -4,12 +4,12 @@ import (
 	"bufio"
 	"bytes"
 	"context"
+	"emperror.dev/errors"
 	"github.com/apex/log"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/client"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
@@ -25,7 +25,7 @@ import (
 // Executes the installation stack for a server process. Bubbles any errors up to the calling
 // function which should handle contacting the panel to notify it of the server state.
 //
-// Pass true as the first arugment in order to execute a server sync before the process to
+// Pass true as the first argument in order to execute a server sync before the process to
 // ensure the latest information is used.
 func (s *Server) Install(sync bool) error {
 	if sync {
@@ -35,10 +35,17 @@ func (s *Server) Install(sync bool) error {
 		}
 	}
 
-	// Send the start event so the Panel can automatically update.
+	var err error
-	s.Events().Publish(InstallStartedEvent, "")
+	if !s.Config().SkipEggScripts {
+		// Send the start event so the Panel can automatically update. We don't send this unless the process
+		// is actually going to run, otherwise all sorts of weird rapid UI behavior happens since there isn't
+		// an actual install process being executed.
+		s.Events().Publish(InstallStartedEvent, "")
 
-	err := s.internalInstall()
+		err = s.internalInstall()
+	} else {
+		s.Log().Info("server configured to skip running installation scripts for this egg, not executing process")
+	}
 
 	s.Log().Debug("notifying panel of server install state")
 	if serr := s.SyncInstallState(err == nil); serr != nil {
@@ -56,7 +63,7 @@ func (s *Server) Install(sync bool) error {
 
 	// Ensure that the server is marked as offline at this point, otherwise you end up
 	// with a blank value which is a bit confusing.
-	s.SetState(environment.ProcessOfflineState)
+	s.Environment.SetState(environment.ProcessOfflineState)
 
 	// Push an event to the websocket so we can auto-refresh the information in the panel once
 	// the install is completed.
@@ -80,18 +87,18 @@ func (s *Server) Reinstall() error {
 
 // Internal installation function used to simplify reporting back to the Panel.
 func (s *Server) internalInstall() error {
-	script, rerr, err := api.NewRequester().GetInstallationScript(s.Id())
+	script, err := api.New().GetInstallationScript(s.Id())
-	if err != nil || rerr != nil {
+	if err != nil {
-		if err != nil {
+		if !api.IsRequestError(err) {
-			return err
+			return errors.WithStackIf(err)
 		}
 
-		return errors.New(rerr.String())
+		return errors.New(err.Error())
 	}
 
 	p, err := NewInstallationProcess(s, &script)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	s.Log().Info("beginning installation process for server")
@@ -122,8 +129,8 @@ func NewInstallationProcess(s *Server, script *api.InstallationScript) (*Install
 	ctx, cancel := context.WithCancel(context.Background())
 	s.installer.cancel = &cancel
 
-	if c, err := client.NewClientWithOpts(client.FromEnv); err != nil {
+	if c, err := environment.DockerClient(); err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	} else {
 		proc.client = c
 		proc.context = ctx
@@ -186,11 +193,11 @@ func (ip *InstallationProcess) RemoveContainer() {
 	})
 
 	if err != nil && !client.IsErrNotFound(err) {
-		ip.Server.Log().WithField("error", errors.WithStack(err)).Warn("failed to delete server install container")
+		ip.Server.Log().WithField("error", errors.WithStackIf(err)).Warn("failed to delete server install container")
 	}
 }
 
-// Runs the installation process, this is done as a backgrounded thread. This will configure
+// Runs the installation process, this is done as in a background thread. This will configure
 // the required environment, and then spin up the installation container.
 //
 // Once the container finishes installing the results will be stored in an installation
@@ -203,7 +210,7 @@ func (ip *InstallationProcess) Run() error {
 
 	// We now have an exclusive lock on this installation process. Ensure that whenever this
 	// process is finished that the semaphore is released so that other processes and be executed
-	// without encounting a wait timeout.
+	// without encountering a wait timeout.
 	defer func() {
 		ip.Server.Log().Debug("releasing installation process lock")
 		ip.Server.installer.sem.Release(1)
@@ -211,14 +218,14 @@ func (ip *InstallationProcess) Run() error {
 	}()
 
 	if err := ip.BeforeExecute(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	cid, err := ip.Execute()
 	if err != nil {
 		ip.RemoveContainer()
 
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// If this step fails, log a warning but don't exit out of the process. This is completely
@@ -241,12 +248,12 @@ func (ip *InstallationProcess) writeScriptToDisk() error {
 	// Make sure the temp directory root exists before trying to make a directory within it. The
 	// ioutil.TempDir call expects this base to exist, it won't create it for you.
 	if err := os.MkdirAll(ip.tempDir(), 0700); err != nil {
-		return errors.Wrap(err, "could not create temporary directory for install process")
+		return errors.WrapIf(err, "could not create temporary directory for install process")
 	}
 
 	f, err := os.OpenFile(filepath.Join(ip.tempDir(), "install.sh"), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
 	if err != nil {
-		return errors.Wrap(err, "failed to write server installation script to disk before mount")
+		return errors.WrapIf(err, "failed to write server installation script to disk before mount")
 	}
 	defer f.Close()
 
@@ -258,7 +265,7 @@ func (ip *InstallationProcess) writeScriptToDisk() error {
 	}
 
 	if err := scanner.Err(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	w.Flush()
@@ -270,7 +277,7 @@ func (ip *InstallationProcess) writeScriptToDisk() error {
 func (ip *InstallationProcess) pullInstallationImage() error {
 	r, err := ip.client.ImagePull(ip.context, ip.Script.ContainerImage, types.ImagePullOptions{})
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Block continuation until the image has been pulled successfully.
@@ -280,7 +287,7 @@ func (ip *InstallationProcess) pullInstallationImage() error {
 	}
 
 	if err := scanner.Err(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -291,11 +298,11 @@ func (ip *InstallationProcess) pullInstallationImage() error {
 // manner, if either one fails the error is returned.
 func (ip *InstallationProcess) BeforeExecute() error {
 	if err := ip.writeScriptToDisk(); err != nil {
-		return errors.Wrap(err, "failed to write installation script to disk")
+		return errors.WrapIf(err, "failed to write installation script to disk")
 	}
 
 	if err := ip.pullInstallationImage(); err != nil {
-		return errors.Wrap(err, "failed to pull updated installation container image for server")
+		return errors.WrapIf(err, "failed to pull updated installation container image for server")
 	}
 
 	opts := types.ContainerRemoveOptions{
@@ -305,7 +312,7 @@ func (ip *InstallationProcess) BeforeExecute() error {
 
 	if err := ip.client.ContainerRemove(ip.context, ip.Server.Id()+"_installer", opts); err != nil {
 		if !client.IsErrNotFound(err) {
-			return errors.Wrap(err, "failed to remove existing install container for server")
+			return errors.WrapIf(err, "failed to remove existing install container for server")
 		}
 	}
 
@@ -331,12 +338,12 @@ func (ip *InstallationProcess) AfterExecute(containerId string) error {
 	})
 
 	if err != nil && !client.IsErrNotFound(err) {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	f, err := os.OpenFile(ip.GetLogPath(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 	defer f.Close()
 
@@ -365,15 +372,15 @@ func (ip *InstallationProcess) AfterExecute(containerId string) error {
 | ------------------------------
 `)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	if err := tmpl.Execute(f, ip); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	if _, err := io.Copy(f, reader); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -388,7 +395,7 @@ func (ip *InstallationProcess) Execute() (string, error) {
 		AttachStdin:  true,
 		OpenStdin:    true,
 		Tty:          true,
-		Cmd:          []string{ip.Script.Entrypoint, "./mnt/install/install.sh"},
+		Cmd:          []string{ip.Script.Entrypoint, "/mnt/install/install.sh"},
 		Image:        ip.Script.ContainerImage,
 		Env:          ip.Server.GetEnvironmentVariables(),
 		Labels: map[string]string{
@@ -402,7 +409,7 @@ func (ip *InstallationProcess) Execute() (string, error) {
 		Mounts: []mount.Mount{
 			{
 				Target:   "/mnt/server",
-				Source:   ip.Server.Filesystem.Path(),
+				Source:   ip.Server.Filesystem().Path(),
 				Type:     mount.TypeBind,
 				ReadOnly: false,
 			},
@@ -441,7 +448,7 @@ func (ip *InstallationProcess) Execute() (string, error) {
 
 	r, err := ip.client.ContainerCreate(ip.context, conf, hostConf, nil, ip.Server.Id()+"_installer")
 	if err != nil {
-		return "", errors.WithStack(err)
+		return "", errors.WithStackIf(err)
 	}
 
 	ip.Server.Log().WithField("container_id", r.ID).Info("running installation script for server in container")
@@ -457,13 +464,13 @@ func (ip *InstallationProcess) Execute() (string, error) {
 		ip.Server.Events().Publish(DaemonMessageEvent, "Installation process completed.")
 	}(r.ID)
 
-	sChann, eChann := ip.client.ContainerWait(ip.context, r.ID, container.WaitConditionNotRunning)
+	sChan, eChan := ip.client.ContainerWait(ip.context, r.ID, container.WaitConditionNotRunning)
 	select {
-	case err := <-eChann:
+	case err := <-eChan:
 		if err != nil {
-			return "", errors.WithStack(err)
+			return "", errors.WithStackIf(err)
 		}
-	case <-sChann:
+	case <-sChan:
 	}
 
 	return r.ID, nil
@@ -480,7 +487,7 @@ func (ip *InstallationProcess) StreamOutput(id string) error {
 	})
 
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	defer reader.Close()
@@ -493,7 +500,7 @@ func (ip *InstallationProcess) StreamOutput(id string) error {
 	if err := s.Err(); err != nil {
 		ip.Server.Log().WithFields(log.Fields{
 			"container_id": id,
-			"error":        errors.WithStack(err),
+			"error":        errors.WithStackIf(err),
 		}).Warn("error processing scanner line in installation output for server")
 	}
 
@@ -505,15 +512,13 @@ func (ip *InstallationProcess) StreamOutput(id string) error {
 // value of "true" means everything was successful, "false" means something went
 // wrong and the server must be deleted and re-created.
 func (s *Server) SyncInstallState(successful bool) error {
-	r := api.NewRequester()
+	err := api.New().SendInstallationStatus(s.Id(), successful)
-
+	if err != nil {
-	rerr, err := r.SendInstallationStatus(s.Id(), successful)
+		if !api.IsRequestError(err) {
-	if rerr != nil || err != nil {
+			return errors.WithStackIf(err)
-		if err != nil {
-			return errors.WithStack(err)
 		}
 
-		return errors.New(rerr.String())
+		return errors.New(err.Error())
 	}
 
 	return nil

server/listeners.go

@@ -1,60 +1,146 @@
 package server
 
 import (
+	"emperror.dev/errors"
 	"encoding/json"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/events"
 	"regexp"
+	"strconv"
+	"sync"
 )
 
-// Adds all of the internal event listeners we want to use for a server.
+var dockerEvents = []string{
+	environment.DockerImagePullStatus,
+	environment.DockerImagePullStarted,
+	environment.DockerImagePullCompleted,
+}
+
+type diskSpaceLimiter struct {
+	o      sync.Once
+	mu     sync.Mutex
+	server *Server
+}
+
+func newDiskLimiter(s *Server) *diskSpaceLimiter {
+	return &diskSpaceLimiter{server: s}
+}
+
+// Reset the disk space limiter status.
+func (dsl *diskSpaceLimiter) Reset() {
+	dsl.mu.Lock()
+	dsl.o = sync.Once{}
+	dsl.mu.Unlock()
+}
+
+// Trigger the disk space limiter which will attempt to stop a running server instance within
+// 15 seconds, and terminate it forcefully if it does not stop.
+//
+// This function is only executed one time, so whenever a server is marked as booting the limiter
+// should be reset so it can properly be triggered as needed.
+func (dsl *diskSpaceLimiter) Trigger() {
+	dsl.o.Do(func() {
+		dsl.server.PublishConsoleOutputFromDaemon("Server is exceeding the assigned disk space limit, stopping process now.")
+		if err := dsl.server.Environment.WaitForStop(60, true); err != nil {
+			dsl.server.Log().WithField("error", err).Error("failed to stop server after exceeding space limit!")
+		}
+	})
+}
+
+// Adds all of the internal event listeners we want to use for a server. These listeners can only be
+// removed by deleting the server as they should last for the duration of the process' lifetime.
 func (s *Server) StartEventListeners() {
-	console := make(chan events.Event)
+	console := func(e events.Event) {
-	state := make(chan events.Event)
+		t := s.Throttler()
-	stats := make(chan events.Event)
+		err := t.Increment(func() {
+			s.PublishConsoleOutputFromDaemon("Your server is outputting too much data and is being throttled.")
+		})
 
-	s.Environment.Events().Subscribe(environment.ConsoleOutputEvent, console)
+		// An error is only returned if the server has breached the thresholds set.
-	s.Environment.Events().Subscribe(environment.StateChangeEvent, state)
+		if err != nil {
-	s.Environment.Events().Subscribe(environment.ResourceEvent, stats)
+			// If the process is already stopping, just let it continue with that action rather than attempting
+			// to terminate again.
+			if s.Environment.State() != environment.ProcessStoppingState {
+				s.Environment.SetState(environment.ProcessStoppingState)
+				go func() {
+					s.Log().Warn("stopping server instance, violating throttle limits")
+					s.PublishConsoleOutputFromDaemon("Your server is being stopped for outputting too much data in a short period of time.")
+					// Completely skip over server power actions and terminate the running instance. This gives the
+					// server 15 seconds to finish stopping gracefully before it is forcefully terminated.
+					if err := s.Environment.WaitForStop(config.Get().Throttles.StopGracePeriod, true); err != nil {
+						// If there is an error set the process back to running so that this throttler is called
+						// again and hopefully kills the server.
+						if s.Environment.State() != environment.ProcessOfflineState {
+							s.Environment.SetState(environment.ProcessRunningState)
+						}
 
-	// TODO: this is leaky I imagine since the routines aren't destroyed when the server is?
+						s.Log().WithField("error", errors.WithStackIf(err)).Error("failed to terminate environment after triggering throttle")
-	go func() {
+					}
-		for {
+				}()
-			select {
-			case data := <-console:
-				// Immediately emit this event back over the server event stream since it is
-				// being called from the environment event stream and things probably aren't
-				// listening to that event.
-				s.Events().Publish(ConsoleOutputEvent, data.Data)
-
-				// Also pass the data along to the console output channel.
-				s.onConsoleOutput(data.Data)
-			case data := <-state:
-				s.SetState(data.Data)
-			case data := <-stats:
-				st := new(environment.Stats)
-				if err := json.Unmarshal([]byte(data.Data), st); err != nil {
-					s.Log().WithField("error", errors.WithStack(err)).Warn("failed to unmarshal server environment stats")
-					continue
-				}
-
-				// Update the server resource tracking object with the resources we got here.
-				s.resources.mu.Lock()
-				s.resources.Stats = *st
-				s.resources.mu.Unlock()
-
-				// TODO: we'll need to handle this better since calling it in rapid succession will
-				//  cause it to block until the first call is done calculating disk usage, which will
-				//  case stat events to pile up for the server.
-				s.Filesystem.HasSpaceAvailable()
-
-				s.emitProcUsage()
 			}
 		}
-	}()
+
+		// If we are not throttled, go ahead and output the data.
+		if !t.Throttled() {
+			s.Events().Publish(ConsoleOutputEvent, e.Data)
+		}
+
+		// Also pass the data along to the console output channel.
+		s.onConsoleOutput(e.Data)
+	}
+
+	l := newDiskLimiter(s)
+	state := func(e events.Event) {
+		// Reset the throttler when the process is started.
+		if e.Data == environment.ProcessStartingState {
+			l.Reset()
+			s.Throttler().Reset()
+		}
+
+		s.OnStateChange()
+	}
+
+	stats := func(e events.Event) {
+		st := new(environment.Stats)
+		if err := json.Unmarshal([]byte(e.Data), st); err != nil {
+			s.Log().WithField("error", errors.WithStackIf(err)).Warn("failed to unmarshal server environment stats")
+			return
+		}
+
+		// Update the server resource tracking object with the resources we got here.
+		s.resources.mu.Lock()
+		s.resources.Stats = *st
+		s.resources.mu.Unlock()
+
+		// If there is no disk space available at this point, trigger the server disk limiter logic
+		// which will start to stop the running instance.
+		if !s.Filesystem().HasSpaceAvailable(true) {
+			l.Trigger()
+		}
+
+		s.emitProcUsage()
+	}
+
+	docker := func(e events.Event) {
+		if e.Topic == environment.DockerImagePullStatus {
+			s.Events().Publish(InstallOutputEvent, e.Data)
+		} else if e.Topic == environment.DockerImagePullStarted {
+			s.PublishConsoleOutputFromDaemon("Pulling Docker container image, this could take a few minutes to complete...")
+		} else {
+			s.PublishConsoleOutputFromDaemon("Finished pulling Docker container image")
+		}
+	}
+
+	s.Log().Info("registering event listeners: console, state, resources...")
+	s.Environment.Events().On(environment.ConsoleOutputEvent, &console)
+	s.Environment.Events().On(environment.StateChangeEvent, &state)
+	s.Environment.Events().On(environment.ResourceEvent, &stats)
+	for _, evt := range dockerEvents {
+		s.Environment.Events().On(evt, &docker)
+	}
 }
 
 var stripAnsiRegex = regexp.MustCompile("[\u001B\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[a-zA-Z\\d]*)*)?\u0007)|(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PRZcf-ntqry=><~]))")
@@ -81,13 +167,13 @@ func (s *Server) onConsoleOutput(data string) {
 
 			s.Log().WithFields(log.Fields{
 				"match":   l.String(),
-				"against": data,
+				"against": strconv.QuoteToASCII(data),
 			}).Debug("detected server in running state based on console line output")
 
 			// If the specific line of output is one that would mark the server as started,
 			// set the server to that state. Only do this if the server is not currently stopped
 			// or stopping.
-			_ = s.SetState(environment.ProcessRunningState)
+			s.Environment.SetState(environment.ProcessRunningState)
 			break
 		}
 	}
@@ -99,7 +185,7 @@ func (s *Server) onConsoleOutput(data string) {
 		stop := processConfiguration.Stop
 
 		if stop.Type == api.ProcessStopCommand && data == stop.Value {
-			_ = s.SetState(environment.ProcessOfflineState)
+			s.Environment.SetState(environment.ProcessOfflineState)
 		}
 	}
 }

server/loader.go

@@ -1,15 +1,19 @@
 package server
 
 import (
+	"emperror.dev/errors"
+	"encoding/json"
 	"fmt"
 	"github.com/apex/log"
 	"github.com/creasty/defaults"
 	"github.com/gammazero/workerpool"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/environment/docker"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"os"
+	"path/filepath"
 	"runtime"
 	"time"
 )
@@ -28,40 +32,41 @@ func LoadDirectory() error {
 	}
 
 	log.Info("fetching list of servers from API")
-	configs, rerr, err := api.NewRequester().GetAllServerConfigurations()
+	configs, err := api.New().GetServers()
-	if err != nil || rerr != nil {
+	if err != nil {
-		if err != nil {
+		if !api.IsRequestError(err) {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 
-		return errors.New(rerr.String())
+		return errors.New(err.Error())
-	}
-
-	log.Debug("retrieving cached server states from disk")
-	states, err := getServerStates()
-	if err != nil {
-		log.WithField("error", errors.WithStack(err)).Error("failed to retrieve locally cached server states from disk, assuming all servers in offline state")
 	}
 
 	start := time.Now()
 	log.WithField("total_configs", len(configs)).Info("processing servers returned by the API")
 
 	pool := workerpool.New(runtime.NumCPU())
-	for uuid, data := range configs {
+	log.Debugf("using %d workerpools to instantiate server instances", runtime.NumCPU())
-		uuid := uuid
+	for _, data := range configs {
 		data := data
 
 		pool.Submit(func() {
-			log.WithField("server", uuid).Info("creating new server object from API response")
+			// Parse the json.RawMessage into an expected struct value. We do this here so that a single broken
-			s, err := FromConfiguration(data)
+			// server does not cause the entire boot process to hang, and allows us to show more useful error
-			if err != nil {
+			// messaging in the output.
-				log.WithField("server", uuid).WithField("error", err).Error("failed to load server, skipping...")
+			d := api.ServerConfigurationResponse{
+				Settings: data.Settings,
+			}
+
+			log.WithField("server", data.Uuid).Info("creating new server object from API response")
+			if err := json.Unmarshal(data.ProcessConfiguration, &d.ProcessConfiguration); err != nil {
+				log.WithField("server", data.Uuid).WithField("error", err).Error("failed to parse server configuration from API response, skipping...")
 				return
 			}
 
-			if state, exists := states[s.Id()]; exists {
+			s, err := FromConfiguration(d)
-				s.Log().WithField("state", state).Debug("found existing server state in cache file; re-instantiating server state")
+			if err != nil {
-				s.SetState(state)
+				log.WithField("server", data.Uuid).WithField("error", err).Error("failed to load server, skipping...")
+				return
 			}
 
 			servers.Add(s)
@@ -81,32 +86,41 @@ func LoadDirectory() error {
 // Initializes a server using a data byte array. This will be marshaled into the
 // given struct using a YAML marshaler. This will also configure the given environment
 // for a server.
-func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
+func FromConfiguration(data api.ServerConfigurationResponse) (*Server, error) {
 	cfg := Configuration{}
 	if err := defaults.Set(&cfg); err != nil {
-		return nil, errors.Wrap(err, "failed to set struct defaults for server configuration")
+		return nil, errors.WrapIf(err, "failed to set struct defaults for server configuration")
 	}
 
 	s := new(Server)
 	if err := defaults.Set(s); err != nil {
-		return nil, errors.Wrap(err, "failed to set struct defaults for server")
+		return nil, errors.WrapIf(err, "failed to set struct defaults for server")
 	}
 
 	s.cfg = cfg
-	if err := s.UpdateDataStructure(data.Settings, false); err != nil {
+	if err := s.UpdateDataStructure(data.Settings); err != nil {
 		return nil, err
 	}
 
+	s.resources = ResourceUsage{}
+	defaults.Set(&s.resources)
+	s.resources.State.Store(environment.ProcessOfflineState)
+
 	s.Archiver = Archiver{Server: s}
-	s.Filesystem = Filesystem{Server: s}
+	s.fs = filesystem.New(filepath.Join(config.Get().System.Data, s.Id()), s.DiskSpace())
 
 	// Right now we only support a Docker based environment, so I'm going to hard code
 	// this logic in. When we're ready to support other environment we'll need to make
 	// some modifications here obviously.
-	envCfg := environment.NewConfiguration(s.Mounts(), s.cfg.Allocations, s.cfg.Build, s.cfg.EnvVars)
+	settings := environment.Settings{
+		Mounts:      s.Mounts(),
+		Allocations: s.cfg.Allocations,
+		Limits:      s.cfg.Build,
+	}
+
+	envCfg := environment.NewConfiguration(settings, s.GetEnvironmentVariables())
 	meta := docker.Metadata{
-		Invocation: s.Config().Invocation,
+		Image: s.Config().Container.Image,
-		Image:      s.Config().Container.Image,
 	}
 
 	if env, err := docker.New(s.Id(), &meta, envCfg); err != nil {
@@ -114,6 +128,7 @@ func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
 	} else {
 		s.Environment = env
 		s.StartEventListeners()
+		s.Throttler().StartTimer()
 	}
 
 	// Forces the configuration to be synced with the panel.
@@ -122,8 +137,8 @@ func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
 	}
 
 	// If the server's data directory exists, force disk usage calculation.
-	if _, err := os.Stat(s.Filesystem.Path()); err == nil {
+	if _, err := os.Stat(s.Filesystem().Path()); err == nil {
-		go s.Filesystem.HasSpaceAvailable()
+		s.Filesystem().HasSpaceAvailable(true)
 	}
 
 	return s, nil

server/mounts.go

@@ -2,10 +2,8 @@ package server
 
 import (
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
-	"os"
 	"path/filepath"
 	"strings"
 )
@@ -16,41 +14,17 @@ import (
 type Mount environment.Mount
 
 // Returns the default container mounts for the server instance. This includes the data directory
-// for the server as well as any timezone related files if they exist on the host system so that
+// for the server. Previously this would also mount in host timezone files, however we've moved from
-// servers running within the container will use the correct time.
+// that approach to just setting `TZ=Timezone` environment values in containers which should work
+// in most scenarios.
 func (s *Server) Mounts() []environment.Mount {
-	var m []environment.Mount
+	m := []environment.Mount{
-
+		{
-	m = append(m, environment.Mount{
+			Default:  true,
-		Default:  true,
+			Target:   "/home/container",
-		Target:   "/home/container",
+			Source:   s.Filesystem().Path(),
-		Source:   s.Filesystem.Path(),
+			ReadOnly: false,
-		ReadOnly: false,
+		},
-	})
-
-	// Try to mount in /etc/localtime and /etc/timezone if they exist on the host system.
-	if _, err := os.Stat("/etc/localtime"); err != nil {
-		if !os.IsNotExist(err) {
-			log.WithField("error", errors.WithStack(err)).Warn("failed to stat /etc/localtime due to an error")
-		}
-	} else {
-		m = append(m, environment.Mount{
-			Target:   "/etc/localtime",
-			Source:   "/etc/localtime",
-			ReadOnly: true,
-		})
-	}
-
-	if _, err := os.Stat("/etc/timezone"); err != nil {
-		if !os.IsNotExist(err) {
-			log.WithField("error", errors.WithStack(err)).Warn("failed to stat /etc/timezone due to an error")
-		}
-	} else {
-		m = append(m, environment.Mount{
-			Target:   "/etc/timezone",
-			Source:   "/etc/timezone",
-			ReadOnly: true,
-		})
 	}
 
 	// Also include any of this server's custom mounts when returning them.

server/power.go

@@ -2,7 +2,10 @@ package server
 
 import (
 	"context"
-	"github.com/pkg/errors"
+	"emperror.dev/errors"
+	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/environment"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"golang.org/x/sync/semaphore"
 	"os"
 	"time"
@@ -36,6 +39,21 @@ func (pa PowerAction) IsStart() bool {
 	return pa == PowerActionStart || pa == PowerActionRestart
 }
 
+// Check if there is currently a power action being processed for the server.
+func (s *Server) ExecutingPowerAction() bool {
+	if s.powerLock == nil {
+		return false
+	}
+
+	ok := s.powerLock.TryAcquire(1)
+	if ok {
+		s.powerLock.Release(1)
+	}
+
+	// Remember, if we acquired a lock it means nothing was running.
+	return !ok
+}
+
 // Helper function that can receive a power action and then process the actions that need
 // to occur for it. This guards against someone calling Start() twice at the same time, or
 // trying to restart while another restart process is currently running.
@@ -62,13 +80,13 @@ func (s *Server) HandlePowerAction(action PowerAction, waitSeconds ...int) error
 			// time than that passes an error will be propagated back up the chain and this
 			// request will be aborted.
 			if err := s.powerLock.Acquire(ctx, 1); err != nil {
-				return errors.Wrap(err, "could not acquire lock on power state")
+				return errors.WrapIf(err, "could not acquire lock on power state")
 			}
 		} else {
 			// If no wait duration was provided we will attempt to immediately acquire the lock
 			// and bail out with a context deadline error if it is not acquired immediately.
 			if ok := s.powerLock.TryAcquire(1); !ok {
-				return errors.Wrap(context.DeadlineExceeded, "could not acquire lock on power state")
+				return errors.WrapIf(context.DeadlineExceeded, "could not acquire lock on power state")
 			}
 		}
 
@@ -86,6 +104,10 @@ func (s *Server) HandlePowerAction(action PowerAction, waitSeconds ...int) error
 
 	switch action {
 	case PowerActionStart:
+		if s.GetState() != environment.ProcessOfflineState {
+			return ErrIsRunning
+		}
+
 		// Run the pre-boot logic for the server before processing the environment start.
 		if err := s.onBeforeStart(); err != nil {
 			return err
@@ -93,7 +115,7 @@ func (s *Server) HandlePowerAction(action PowerAction, waitSeconds ...int) error
 
 		return s.Environment.Start()
 	case PowerActionStop:
-		// We're specificially waiting for the process to be stopped here, otherwise the lock is released
+		// We're specifically waiting for the process to be stopped here, otherwise the lock is released
 		// too soon, and you can rack up all sorts of issues.
 		return s.Environment.WaitForStop(10*60, true)
 	case PowerActionRestart:
@@ -125,32 +147,46 @@ func (s *Server) HandlePowerAction(action PowerAction, waitSeconds ...int) error
 // Execute a few functions before actually calling the environment start commands. This ensures
 // that everything is ready to go for environment booting, and that the server can even be started.
 func (s *Server) onBeforeStart() error {
-	// Disallow start & restart if the server is suspended.
-	if s.IsSuspended() {
-		return new(suspendedError)
-	}
-
 	s.Log().Info("syncing server configuration with panel")
 	if err := s.Sync(); err != nil {
-		return errors.Wrap(err, "unable to sync server data from Panel instance")
+		return errors.WrapIf(err, "unable to sync server data from Panel instance")
 	}
 
-	if !s.Filesystem.HasSpaceAvailable() {
+	// Disallow start & restart if the server is suspended. Do this check after performing a sync
-		return errors.New("cannot start server, not enough disk space available")
+	// action with the Panel to ensure that we have the most up-to-date information for that server.
+	if s.IsSuspended() {
+		return ErrSuspended
+	}
+
+	// Ensure we sync the server information with the environment so that any new environment variables
+	// and process resource limits are correctly applied.
+	s.SyncWithEnvironment()
+
+	// If a server has unlimited disk space, we don't care enough to block the startup to check remaining.
+	// However, we should trigger a size anyway, as it'd be good to kick it off for other processes.
+	if s.DiskSpace() <= 0 {
+		s.Filesystem().HasSpaceAvailable(true)
+	} else {
+		s.PublishConsoleOutputFromDaemon("Checking server disk space usage, this could take a few seconds...")
+		if !s.Filesystem().HasSpaceAvailable(false) {
+			return filesystem.ErrNotEnoughDiskSpace
+		}
 	}
 
 	// Update the configuration files defined for the server before beginning the boot process.
 	// This process executes a bunch of parallel updates, so we just block until that process
-	// is completee. Any errors as a result of this will just be bubbled out in the logger,
+	// is complete. Any errors as a result of this will just be bubbled out in the logger,
 	// we don't need to actively do anything about it at this point, worst comes to worst the
 	// server starts in a weird state and the user can manually adjust.
 	s.PublishConsoleOutputFromDaemon("Updating process configuration files...")
 	s.UpdateConfigurationFiles()
 
-	s.PublishConsoleOutputFromDaemon("Ensuring file permissions are set correctly, this could take a few seconds...")
+	if config.Get().System.CheckPermissionsOnBoot {
-	// Ensure all of the server file permissions are set correctly before booting the process.
+		s.PublishConsoleOutputFromDaemon("Ensuring file permissions are set correctly, this could take a few seconds...")
-	if err := s.Filesystem.Chown("/"); err != nil {
+		// Ensure all of the server file permissions are set correctly before booting the process.
-		return errors.Wrap(err, "failed to chown root server directory during pre-boot process")
+		if err := s.Filesystem().Chown("/"); err != nil {
+			return errors.WrapIf(err, "failed to chown root server directory during pre-boot process")
+		}
 	}
 
 	return nil

server/resources.go

@@ -3,7 +3,9 @@ package server
 import (
 	"encoding/json"
 	"github.com/pterodactyl/wings/environment"
+	"github.com/pterodactyl/wings/system"
 	"sync"
+	"sync/atomic"
 )
 
 // Defines the current resource usage for a given server instance. If a server is offline you
@@ -16,19 +18,36 @@ type ResourceUsage struct {
 	environment.Stats
 
 	// The current server status.
-	State string `json:"state" default:"offline"`
+	State *system.AtomicString `json:"state" default:"{}"`
 
-	// The current disk space being used by the server. This is cached to prevent slow lookup
+	// The current disk space being used by the server. This value is not guaranteed to be accurate
-	// issues on frequent refreshes.
+	// at all times. It is "manually" set whenever server.Proc() is called. This is kind of just a
+	// hacky solution for now to avoid passing events all over the place.
 	Disk int64 `json:"disk_bytes"`
 }
 
+// Custom marshaler to ensure that the object is locked when we're converting it to JSON in
+// order to avoid race conditions.
+func (ru *ResourceUsage) MarshalJSON() ([]byte, error) {
+	ru.mu.Lock()
+	defer ru.mu.Unlock()
+
+	// Alias the resource usage so that we don't infinitely recurse when marshaling the struct.
+	type alias ResourceUsage
+
+	return json.Marshal(alias(*ru))
+}
+
 // Returns the resource usage stats for the server instance. If the server is not running, only the
 // disk space currently used will be returned. When the server is running all of the other stats will
 // be returned.
 //
 // When a process is stopped all of the stats are zeroed out except for the disk.
 func (s *Server) Proc() *ResourceUsage {
+	// Store the updated disk usage when requesting process usage.
+	atomic.StoreInt64(&s.resources.Disk, s.Filesystem().CachedUsage())
+
+	// Acquire a lock before attempting to return the value of resources.
 	s.resources.mu.RLock()
 	defer s.resources.mu.RUnlock()
 
@@ -36,30 +55,7 @@ func (s *Server) Proc() *ResourceUsage {
 }
 
 func (s *Server) emitProcUsage() {
-	s.resources.mu.RLock()
+	if err := s.Events().PublishJson(StatsEvent, s.Proc()); err != nil {
-	defer s.resources.mu.RUnlock()
+		s.Log().WithField("error", err).Warn("error while emitting server resource usage to listeners")
-
+	}
-	b, _ := json.Marshal(s.resources)
-	s.Events().Publish(StatsEvent, string(b))
-}
-
-// Returns the servers current state.
-func (ru *ResourceUsage) getInternalState() string {
-	ru.mu.RLock()
-	defer ru.mu.RUnlock()
-
-	return ru.State
-}
-
-// Sets the new state for the server.
-func (ru *ResourceUsage) setInternalState(state string) {
-	ru.mu.Lock()
-	ru.State = state
-	ru.mu.Unlock()
-}
-
-func (ru *ResourceUsage) SetDisk(i int64) {
-	ru.mu.Lock()
-	ru.Disk = i
-	ru.mu.Unlock()
 }

server/server.go

@@ -2,17 +2,18 @@ package server
 
 import (
 	"context"
+	"emperror.dev/errors"
 	"fmt"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/environment/docker"
 	"github.com/pterodactyl/wings/events"
+	"github.com/pterodactyl/wings/server/filesystem"
 	"golang.org/x/sync/semaphore"
 	"strings"
 	"sync"
-	"time"
 )
 
 // High level definition for a server instance being controlled by Wings.
@@ -22,7 +23,7 @@ type Server struct {
 	sync.RWMutex
 	emitterLock  sync.Mutex
 	powerLock    *semaphore.Weighted
-	throttleLock sync.RWMutex
+	throttleLock sync.Mutex
 
 	// Maintains the configuration for the server. This is the data that gets returned by the Panel
 	// such as build settings and container images.
@@ -34,7 +35,8 @@ type Server struct {
 	resources   ResourceUsage
 	Archiver    Archiver                       `json:"-"`
 	Environment environment.ProcessEnvironment `json:"-"`
-	Filesystem  Filesystem                     `json:"-"`
+
+	fs *filesystem.Filesystem
 
 	// Events emitted by the server instance.
 	emitter *events.EventBus
@@ -52,6 +54,10 @@ type Server struct {
 
 	// The console throttler instance used to control outputs.
 	throttler *ConsoleThrottler
+
+	// Tracks open websocket connections for the server.
+	wsBag       *WebsocketBag
+	wsBagLocker sync.Mutex
 }
 
 type InstallerDetails struct {
@@ -72,18 +78,17 @@ func (s *Server) Id() string {
 // Returns all of the environment variables that should be assigned to a running
 // server instance.
 func (s *Server) GetEnvironmentVariables() []string {
-	zone, _ := time.Now().In(time.Local).Zone()
-
 	var out = []string{
-		fmt.Sprintf("TZ=%s", zone),
+		fmt.Sprintf("TZ=%s", config.Get().System.Timezone),
 		fmt.Sprintf("STARTUP=%s", s.Config().Invocation),
-		fmt.Sprintf("SERVER_MEMORY=%d", s.Build().MemoryLimit),
+		fmt.Sprintf("SERVER_MEMORY=%d", s.MemoryLimit()),
 		fmt.Sprintf("SERVER_IP=%s", s.Config().Allocations.DefaultMapping.Ip),
 		fmt.Sprintf("SERVER_PORT=%d", s.Config().Allocations.DefaultMapping.Port),
 	}
 
 eloop:
 	for k := range s.Config().EnvVars {
+		// Don't allow any environment variables that we have already set above.
 		for _, e := range out {
 			if strings.HasPrefix(e, strings.ToUpper(k)) {
 				continue eloop
@@ -107,44 +112,49 @@ func (s *Server) Log() *log.Entry {
 // This also means mass actions can be performed against servers on the Panel and they
 // will automatically sync with Wings when the server is started.
 func (s *Server) Sync() error {
-	cfg, rerr, err := s.GetProcessConfiguration()
+	cfg, err := api.New().GetServerConfiguration(s.Id())
-	if err != nil || rerr != nil {
+	if err != nil {
-		if err != nil {
+		if !api.IsRequestError(err) {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 
-		if rerr.Status == "404" {
+		if err.(*api.RequestError).Status == "404" {
 			return &serverDoesNotExist{}
 		}
 
-		return errors.New(rerr.String())
+		return errors.New(err.Error())
 	}
 
 	return s.SyncWithConfiguration(cfg)
 }
 
-func (s *Server) SyncWithConfiguration(cfg *api.ServerConfigurationResponse) error {
+func (s *Server) SyncWithConfiguration(cfg api.ServerConfigurationResponse) error {
 	// Update the data structure and persist it to the disk.
-	if err := s.UpdateDataStructure(cfg.Settings, false); err != nil {
+	if err := s.UpdateDataStructure(cfg.Settings); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	s.Lock()
 	s.procConfig = cfg.ProcessConfiguration
 	s.Unlock()
 
+	// Update the disk space limits for the server whenever the configuration
+	// for it changes.
+	s.fs.SetDiskLimit(s.DiskSpace())
+
 	// If this is a Docker environment we need to sync the stop configuration with it so that
 	// the process isn't just terminated when a user requests it be stopped.
 	if e, ok := s.Environment.(*docker.Environment); ok {
 		s.Log().Debug("syncing stop configuration with configured docker environment")
-		e.SetStopConfiguration(&cfg.ProcessConfiguration.Stop)
+		e.SetImage(s.Config().Container.Image)
+		e.SetStopConfiguration(cfg.ProcessConfiguration.Stop)
 	}
 
 	return nil
 }
 
 // Reads the log file for a server up to a specified number of bytes.
-func (s *Server) ReadLogfile(len int64) ([]string, error) {
+func (s *Server) ReadLogfile(len int) ([]string, error) {
 	return s.Environment.Readlog(len)
 }
 
@@ -156,34 +166,25 @@ func (s *Server) IsBootable() bool {
 	return exists
 }
 
-// Initalizes a server instance. This will run through and ensure that the environment
+// Initializes a server instance. This will run through and ensure that the environment
 // for the server is setup, and that all of the necessary files are created.
 func (s *Server) CreateEnvironment() error {
 	// Ensure the data directory exists before getting too far through this process.
-	if err := s.Filesystem.EnsureDataDirectory(); err != nil {
+	if err := s.EnsureDataDirectoryExists(); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return s.Environment.Create()
 }
 
-// Gets the process configuration data for the server.
-func (s *Server) GetProcessConfiguration() (*api.ServerConfigurationResponse, *api.RequestError, error) {
-	return api.NewRequester().GetServerConfiguration(s.Id())
-}
-
 // Checks if the server is marked as being suspended or not on the system.
 func (s *Server) IsSuspended() bool {
 	return s.Config().Suspended
 }
 
-func (s *Server) Build() *environment.Limits {
-	return &s.Config().Build
-}
-
 func (s *Server) ProcessConfiguration() *api.ProcessConfiguration {
 	s.RLock()
 	defer s.RUnlock()
 
 	return s.procConfig
-}
+}

server/state.go

@@ -1,9 +1,8 @@
 package server
 
 import (
+	"emperror.dev/errors"
 	"encoding/json"
-	"fmt"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/config"
 	"github.com/pterodactyl/wings/environment"
 	"io"
@@ -15,7 +14,7 @@ import (
 var stateMutex sync.Mutex
 
 // Returns the state of the servers.
-func getServerStates() (map[string]string, error) {
+func CachedServerStates() (map[string]string, error) {
 	// Request a lock after we check if the file exists.
 	stateMutex.Lock()
 	defer stateMutex.Unlock()
@@ -23,14 +22,14 @@ func getServerStates() (map[string]string, error) {
 	// Open the states file.
 	f, err := os.OpenFile(config.Get().System.GetStatesPath(), os.O_RDONLY|os.O_CREATE, 0644)
 	if err != nil {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 	defer f.Close()
 
 	// Convert the json object to a map.
 	states := map[string]string{}
 	if err := json.NewDecoder(f).Decode(&states); err != nil && err != io.EOF {
-		return nil, errors.WithStack(err)
+		return nil, errors.WithStackIf(err)
 	}
 
 	return states, nil
@@ -47,7 +46,7 @@ func saveServerStates() error {
 	// Convert the map to a json object.
 	data, err := json.Marshal(states)
 	if err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	stateMutex.Lock()
@@ -55,7 +54,7 @@ func saveServerStates() error {
 
 	// Write the data to the file
 	if err := ioutil.WriteFile(config.Get().System.GetStatesPath(), data, 0644); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	return nil
@@ -63,23 +62,17 @@ func saveServerStates() error {
 
 // Sets the state of the server internally. This function handles crash detection as
 // well as reporting to event listeners for the server.
-func (s *Server) SetState(state string) error {
+func (s *Server) OnStateChange() {
-	if state != environment.ProcessOfflineState &&
+	prevState := s.Proc().State.Load()
-		state != environment.ProcessStartingState &&
-		state != environment.ProcessRunningState &&
-		state != environment.ProcessStoppingState {
-		return errors.New(fmt.Sprintf("invalid server state received: %s", state))
-	}
-
-	prevState := s.GetState()
 
+	st := s.Environment.State()
 	// Update the currently tracked state for the server.
-	s.Proc().setInternalState(state)
+	s.Proc().State.Store(st)
 
 	// Emit the event to any listeners that are currently registered.
-	if prevState != state {
+	if prevState != s.Environment.State() {
-		s.Log().WithField("status", s.Proc().State).Debug("saw server status change event")
+		s.Log().WithField("status", st).Debug("saw server status change event")
-		s.Events().Publish(StatusEvent, s.Proc().State)
+		s.Events().Publish(StatusEvent, st)
 	}
 
 	// Persist this change to the disk immediately so that should the Daemon be stopped or
@@ -98,7 +91,7 @@ func (s *Server) SetState(state string) error {
 
 	// Reset the resource usage to 0 when the process fully stops so that all of the UI
 	// views in the Panel correctly display 0.
-	if state == environment.ProcessOfflineState {
+	if st == environment.ProcessOfflineState {
 		s.resources.mu.Lock()
 		s.resources.Empty()
 		s.resources.mu.Unlock()
@@ -127,13 +120,13 @@ func (s *Server) SetState(state string) error {
 			}
 		}(s)
 	}
-
-	return nil
 }
 
 // Returns the current state of the server in a race-safe manner.
+// Deprecated
+// use Environment.State()
 func (s *Server) GetState() string {
-	return s.Proc().getInternalState()
+	return s.Environment.State()
 }
 
 // Determines if the server state is running or not. This is different than the

server/update.go

@@ -1,10 +1,10 @@
 package server
 
 import (
+	"emperror.dev/errors"
 	"encoding/json"
 	"github.com/buger/jsonparser"
 	"github.com/imdario/mergo"
-	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/environment"
 )
 
@@ -15,10 +15,10 @@ import (
 // The server will be marked as requiring a rebuild on the next boot sequence,
 // it is up to the specific environment to determine what needs to happen when
 // that is the case.
-func (s *Server) UpdateDataStructure(data []byte, background bool) error {
+func (s *Server) UpdateDataStructure(data []byte) error {
 	src := new(Configuration)
 	if err := json.Unmarshal(data, src); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Don't allow obviously corrupted data to pass through into this function. If the UUID
@@ -47,7 +47,7 @@ func (s *Server) UpdateDataStructure(data []byte, background bool) error {
 	// Merge the new data object that we have received with the existing server data object
 	// and then save it to the disk so it is persistent.
 	if err := mergo.Merge(&c, src, mergo.WithOverride); err != nil {
-		return errors.WithStack(err)
+		return errors.WithStackIf(err)
 	}
 
 	// Don't explode if we're setting CPU limits to 0. Mergo sees that as an empty value
@@ -65,7 +65,7 @@ func (s *Server) UpdateDataStructure(data []byte, background bool) error {
 	// request is going to be boolean. Allegedly.
 	if v, err := jsonparser.GetBoolean(data, "container", "oom_disabled"); err != nil {
 		if err != jsonparser.KeyPathNotFoundError {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 	} else {
 		c.Build.OOMDisabled = v
@@ -74,12 +74,20 @@ func (s *Server) UpdateDataStructure(data []byte, background bool) error {
 	// Mergo also cannot handle this boolean value.
 	if v, err := jsonparser.GetBoolean(data, "suspended"); err != nil {
 		if err != jsonparser.KeyPathNotFoundError {
-			return errors.WithStack(err)
+			return errors.WithStackIf(err)
 		}
 	} else {
 		c.Suspended = v
 	}
 
+	if v, err := jsonparser.GetBoolean(data, "skip_egg_scripts"); err != nil {
+		if err != jsonparser.KeyPathNotFoundError {
+			return errors.WithStackIf(err)
+		}
+	} else {
+		c.SkipEggScripts = v
+	}
+
 	// Environment and Mappings should be treated as a full update at all times, never a
 	// true patch, otherwise we can't know what we're passing along.
 	if src.EnvVars != nil && len(src.EnvVars) > 0 {
@@ -97,36 +105,52 @@ func (s *Server) UpdateDataStructure(data []byte, background bool) error {
 	// Update the configuration once we have a lock on the configuration object.
 	s.cfg = c
 
-	if background {
-		go s.runBackgroundActions()
-	}
-
 	return nil
 }
 
-// Runs through different actions once a server's configuration has been persisted
+// Updates the environment for the server to match any of the changed data. This pushes new settings and
-// to the disk. This function does not return anything as any failures should be logged
+// environment variables to the environment. In addition, the in-situ update method is called on the
-// but have no effect on actually updating the server itself.
+// environment which will allow environments that make use of it (such as Docker) to immediately apply
+// some settings without having to wait on a server to restart.
 //
-// These tasks run in independent threads where relevant to speed up any updates
+// This functionality allows a server's resources limits to be modified on the fly and have them apply
-// that need to happen.
+// right away allowing for dynamic resource allocation and responses to abusive server processes.
-func (s *Server) runBackgroundActions() {
+func (s *Server) SyncWithEnvironment() {
-	// Check if the s is now suspended, and if so and the process is not terminated
+	s.Log().Debug("syncing server settings with environment")
-	// yet, do it immediately.
-	if s.IsSuspended() && s.GetState() != environment.ProcessOfflineState {
-		s.Log().Info("server suspended with running process state, terminating now")
 
-		if err := s.Environment.WaitForStop(10, true); err != nil {
+	// Update the environment settings using the new information from this server.
-			s.Log().WithField("error", err).Warn("failed to terminate server environment after suspension")
+	s.Environment.Config().SetSettings(environment.Settings{
-		}
+		Mounts:      s.Mounts(),
-	}
+		Allocations: s.Config().Allocations,
+		Limits:      s.Config().Build,
+	})
+
+	// If build limits are changed, environment variables also change. Plus, any modifications to
+	// the startup command also need to be properly propagated to this environment.
+	//
+	// @see https://github.com/pterodactyl/panel/issues/2255
+	s.Environment.Config().SetEnvironmentVariables(s.GetEnvironmentVariables())
 
 	if !s.IsSuspended() {
 		// Update the environment in place, allowing memory and CPU usage to be adjusted
 		// on the fly without the user needing to reboot (theoretically).
 		s.Log().Info("performing server limit modification on-the-fly")
 		if err := s.Environment.InSituUpdate(); err != nil {
+			// This is not a failure, the process is still running fine and will fix itself on the
+			// next boot, or fail out entirely in a more logical position.
 			s.Log().WithField("error", err).Warn("failed to perform on-the-fly update of the server environment")
 		}
+	} else {
+		// Checks if the server is now in a suspended state. If so and a server process is currently running it
+		// will be gracefully stopped (and terminated if it refuses to stop).
+		if s.GetState() != environment.ProcessOfflineState {
+			s.Log().Info("server suspended with running process state, terminating now")
+
+			go func(s *Server) {
+				if err := s.Environment.WaitForStop(60, true); err != nil {
+					s.Log().WithField("error", err).Warn("failed to terminate server environment after suspension")
+				}
+			}(s)
+		}
 	}
 }

server/websockets.go

@@ -0,0 +1,61 @@
+package server
+
+import (
+	"context"
+	"github.com/google/uuid"
+	"sync"
+)
+
+type WebsocketBag struct {
+	mu    sync.Mutex
+	conns map[uuid.UUID]*context.CancelFunc
+}
+
+// Returns the websocket bag which contains all of the currently open websocket connections
+// for the server instance.
+func (s *Server) Websockets() *WebsocketBag {
+	s.wsBagLocker.Lock()
+	defer s.wsBagLocker.Unlock()
+
+	if s.wsBag == nil {
+		s.wsBag = &WebsocketBag{}
+	}
+
+	return s.wsBag
+}
+
+// Adds a new websocket connection to the stack.
+func (w *WebsocketBag) Push(u uuid.UUID, cancel *context.CancelFunc) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	if w.conns == nil {
+		w.conns = make(map[uuid.UUID]*context.CancelFunc)
+	}
+
+	w.conns[u] = cancel
+}
+
+// Removes a connection from the stack.
+func (w *WebsocketBag) Remove(u uuid.UUID) {
+	w.mu.Lock()
+	delete(w.conns, u)
+	w.mu.Unlock()
+}
+
+// Cancels all of the stored cancel functions which has the effect of disconnecting
+// every listening websocket for the server.
+func (w *WebsocketBag) CancelAll() {
+	w.mu.Lock()
+	w.mu.Unlock()
+
+	if w.conns != nil {
+		for _, cancel := range w.conns {
+			c := *cancel
+			c()
+		}
+	}
+
+	// Reset the connections.
+	w.conns = make(map[uuid.UUID]*context.CancelFunc)
+}

sftp/errors.go

@@ -0,0 +1,19 @@
+package sftp
+
+type fxerr uint32
+
+const (
+	// Extends the default SFTP server to return a quota exceeded error to the client.
+	//
+	// @see https://tools.ietf.org/id/draft-ietf-secsh-filexfer-13.txt
+	ErrSshQuotaExceeded = fxerr(15)
+)
+
+func (e fxerr) Error() string {
+	switch e {
+	case ErrSshQuotaExceeded:
+		return "Quota Exceeded"
+	default:
+		return "Failure"
+	}
+}

sftp/handler.go

@@ -0,0 +1,380 @@
+package sftp
+
+import (
+	"emperror.dev/errors"
+	"github.com/apex/log"
+	"github.com/patrickmn/go-cache"
+	"github.com/pkg/sftp"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+type FileSystem struct {
+	UUID        string
+	Permissions []string
+	ReadOnly    bool
+	User        User
+	Cache       *cache.Cache
+
+	PathValidator func(fs FileSystem, p string) (string, error)
+	HasDiskSpace  func(fs FileSystem) bool
+
+	logger *log.Entry
+	lock   sync.Mutex
+}
+
+func (fs FileSystem) buildPath(p string) (string, error) {
+	return fs.PathValidator(fs, p)
+}
+
+const (
+	PermissionFileRead        = "file.read"
+	PermissionFileReadContent = "file.read-content"
+	PermissionFileCreate      = "file.create"
+	PermissionFileUpdate      = "file.update"
+	PermissionFileDelete      = "file.delete"
+)
+
+// Fileread creates a reader for a file on the system and returns the reader back.
+func (fs FileSystem) Fileread(request *sftp.Request) (io.ReaderAt, error) {
+	// Check first if the user can actually open and view a file. This permission is named
+	// really poorly, but it is checking if they can read. There is an addition permission,
+	// "save-files" which determines if they can write that file.
+	if !fs.can(PermissionFileReadContent) {
+		return nil, sftp.ErrSshFxPermissionDenied
+	}
+
+	p, err := fs.buildPath(request.Filepath)
+	if err != nil {
+		return nil, sftp.ErrSshFxNoSuchFile
+	}
+
+	fs.lock.Lock()
+	defer fs.lock.Unlock()
+
+	if _, err := os.Stat(p); os.IsNotExist(err) {
+		return nil, sftp.ErrSshFxNoSuchFile
+	} else if err != nil {
+		fs.logger.WithField("error", errors.WithStackIf(err)).Error("error while processing file stat")
+
+		return nil, sftp.ErrSshFxFailure
+	}
+
+	file, err := os.Open(p)
+	if err != nil {
+		fs.logger.WithField("source", p).WithField("error", errors.WithStackIf(err)).Error("could not open file for reading")
+		return nil, sftp.ErrSshFxFailure
+	}
+
+	return file, nil
+}
+
+// Filewrite handles the write actions for a file on the system.
+func (fs FileSystem) Filewrite(request *sftp.Request) (io.WriterAt, error) {
+	if fs.ReadOnly {
+		return nil, sftp.ErrSshFxOpUnsupported
+	}
+
+	p, err := fs.buildPath(request.Filepath)
+	if err != nil {
+		return nil, sftp.ErrSshFxNoSuchFile
+	}
+
+	var l = fs.logger.WithField("source", p)
+
+	// If the user doesn't have enough space left on the server it should respond with an
+	// error since we won't be letting them write this file to the disk.
+	if !fs.HasDiskSpace(fs) {
+		return nil, ErrSshQuotaExceeded
+	}
+
+	fs.lock.Lock()
+	defer fs.lock.Unlock()
+
+	stat, statErr := os.Stat(p)
+	// If the file doesn't exist we need to create it, as well as the directory pathway
+	// leading up to where that file will be created.
+	if os.IsNotExist(statErr) {
+		// This is a different pathway than just editing an existing file. If it doesn't exist already
+		// we need to determine if this user has permission to create files.
+		if !fs.can(PermissionFileCreate) {
+			return nil, sftp.ErrSshFxPermissionDenied
+		}
+
+		// Create all of the directories leading up to the location where this file is being created.
+		if err := os.MkdirAll(filepath.Dir(p), 0755); err != nil {
+			l.WithFields(log.Fields{
+				"path":  filepath.Dir(p),
+				"error": errors.WithStackIf(err),
+			}).Error("error making path for file")
+
+			return nil, sftp.ErrSshFxFailure
+		}
+
+		file, err := os.Create(p)
+		if err != nil {
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to create file")
+
+			return nil, sftp.ErrSshFxFailure
+		}
+
+		// Not failing here is intentional. We still made the file, it is just owned incorrectly
+		// and will likely cause some issues.
+		if err := os.Chown(p, fs.User.Uid, fs.User.Gid); err != nil {
+			l.WithField("error", errors.WithStackIf(err)).Warn("failed to set permissions on file")
+		}
+
+		return file, nil
+	}
+
+	// If the stat error isn't about the file not existing, there is some other issue
+	// at play and we need to go ahead and bail out of the process.
+	if statErr != nil {
+		l.WithField("error", errors.WithStackIf(statErr)).Error("encountered error performing file stat")
+
+		return nil, sftp.ErrSshFxFailure
+	}
+
+	// If we've made it here it means the file already exists and we don't need to do anything
+	// fancy to handle it. Just pass over the request flags so the system knows what the end
+	// goal with the file is going to be.
+	//
+	// But first, check that the user has permission to save modified files.
+	if !fs.can(PermissionFileUpdate) {
+		return nil, sftp.ErrSshFxPermissionDenied
+	}
+
+	// Not sure this would ever happen, but lets not find out.
+	if stat.IsDir() {
+		return nil, sftp.ErrSshFxOpUnsupported
+	}
+
+	file, err := os.Create(p)
+	if err != nil {
+		// Prevent errors if the file is deleted between the stat and this call.
+		if os.IsNotExist(err) {
+			return nil, sftp.ErrSSHFxNoSuchFile
+		}
+
+		l.WithField("flags", request.Flags).WithField("error", errors.WithStackIf(err)).Error("failed to open existing file on system")
+		return nil, sftp.ErrSshFxFailure
+	}
+
+	// Not failing here is intentional. We still made the file, it is just owned incorrectly
+	// and will likely cause some issues.
+	if err := os.Chown(p, fs.User.Uid, fs.User.Gid); err != nil {
+		l.WithField("error", errors.WithStackIf(err)).Warn("error chowning file")
+	}
+
+	return file, nil
+}
+
+// Filecmd hander for basic SFTP system calls related to files, but not anything to do with reading
+// or writing to those files.
+func (fs FileSystem) Filecmd(request *sftp.Request) error {
+	if fs.ReadOnly {
+		return sftp.ErrSshFxOpUnsupported
+	}
+
+	p, err := fs.buildPath(request.Filepath)
+	if err != nil {
+		return sftp.ErrSshFxNoSuchFile
+	}
+
+	var l = fs.logger.WithField("source", p)
+
+	var target string
+	// If a target is provided in this request validate that it is going to the correct
+	// location for the server. If it is not, return an operation unsupported error. This
+	// is maybe not the best error response, but its not wrong either.
+	if request.Target != "" {
+		target, err = fs.buildPath(request.Target)
+		if err != nil {
+			return sftp.ErrSshFxOpUnsupported
+		}
+	}
+
+	switch request.Method {
+	case "Setstat":
+		if !fs.can(PermissionFileUpdate) {
+			return sftp.ErrSshFxPermissionDenied
+		}
+
+		var mode os.FileMode = 0644
+		// If the client passed a valid file permission use that, otherwise use the
+		// default of 0644 set above.
+		if request.Attributes().FileMode().Perm() != 0000 {
+			mode = request.Attributes().FileMode().Perm()
+		}
+
+		// Force directories to be 0755
+		if request.Attributes().FileMode().IsDir() {
+			mode = 0755
+		}
+
+		if err := os.Chmod(p, mode); err != nil {
+			if os.IsNotExist(err) {
+				return sftp.ErrSSHFxNoSuchFile
+			}
+
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to perform setstat on item")
+			return sftp.ErrSSHFxFailure
+		}
+		return nil
+	case "Rename":
+		if !fs.can(PermissionFileUpdate) {
+			return sftp.ErrSSHFxPermissionDenied
+		}
+
+		if err := os.Rename(p, target); err != nil {
+			if os.IsNotExist(err) {
+				return sftp.ErrSSHFxNoSuchFile
+			}
+
+			l.WithField("target", target).WithField("error", errors.WithStackIf(err)).Error("failed to rename file")
+
+			return sftp.ErrSshFxFailure
+		}
+
+		break
+	case "Rmdir":
+		if !fs.can(PermissionFileDelete) {
+			return sftp.ErrSshFxPermissionDenied
+		}
+
+		if err := os.RemoveAll(p); err != nil {
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to remove directory")
+
+			return sftp.ErrSshFxFailure
+		}
+
+		return sftp.ErrSshFxOk
+	case "Mkdir":
+		if !fs.can(PermissionFileCreate) {
+			return sftp.ErrSshFxPermissionDenied
+		}
+
+		if err := os.MkdirAll(p, 0755); err != nil {
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to create directory")
+
+			return sftp.ErrSshFxFailure
+		}
+
+		break
+	case "Symlink":
+		if !fs.can(PermissionFileCreate) {
+			return sftp.ErrSshFxPermissionDenied
+		}
+
+		if err := os.Symlink(p, target); err != nil {
+			l.WithField("target", target).WithField("error", errors.WithStackIf(err)).Error("failed to create symlink")
+
+			return sftp.ErrSshFxFailure
+		}
+
+		break
+	case "Remove":
+		if !fs.can(PermissionFileDelete) {
+			return sftp.ErrSshFxPermissionDenied
+		}
+
+		if err := os.Remove(p); err != nil {
+			if os.IsNotExist(err) {
+				return sftp.ErrSSHFxNoSuchFile
+			}
+
+			l.WithField("error", errors.WithStackIf(err)).Error("failed to remove a file")
+
+			return sftp.ErrSshFxFailure
+		}
+
+		return sftp.ErrSshFxOk
+	default:
+		return sftp.ErrSshFxOpUnsupported
+	}
+
+	var fileLocation = p
+	if target != "" {
+		fileLocation = target
+	}
+
+	// Not failing here is intentional. We still made the file, it is just owned incorrectly
+	// and will likely cause some issues. There is no logical check for if the file was removed
+	// because both of those cases (Rmdir, Remove) have an explicit return rather than break.
+	if err := os.Chown(fileLocation, fs.User.Uid, fs.User.Gid); err != nil {
+		l.WithField("error", errors.WithStackIf(err)).Warn("error chowning file")
+	}
+
+	return sftp.ErrSshFxOk
+}
+
+// Filelist is the handler for SFTP filesystem list calls. This will handle calls to list the contents of
+// a directory as well as perform file/folder stat calls.
+func (fs FileSystem) Filelist(request *sftp.Request) (sftp.ListerAt, error) {
+	p, err := fs.buildPath(request.Filepath)
+	if err != nil {
+		return nil, sftp.ErrSshFxNoSuchFile
+	}
+
+	switch request.Method {
+	case "List":
+		if !fs.can(PermissionFileRead) {
+			return nil, sftp.ErrSshFxPermissionDenied
+		}
+
+		files, err := ioutil.ReadDir(p)
+		if err != nil {
+			fs.logger.WithField("error", errors.WithStackIf(err)).Error("error while listing directory")
+
+			return nil, sftp.ErrSshFxFailure
+		}
+
+		return ListerAt(files), nil
+	case "Stat":
+		if !fs.can(PermissionFileRead) {
+			return nil, sftp.ErrSshFxPermissionDenied
+		}
+
+		s, err := os.Stat(p)
+		if os.IsNotExist(err) {
+			return nil, sftp.ErrSshFxNoSuchFile
+		} else if err != nil {
+			fs.logger.WithField("source", p).WithField("error", errors.WithStackIf(err)).Error("error performing stat on file")
+
+			return nil, sftp.ErrSshFxFailure
+		}
+
+		return ListerAt([]os.FileInfo{s}), nil
+	default:
+		// Before adding readlink support we need to evaluate any potential security risks
+		// as a result of navigating around to a location that is outside the home directory
+		// for the logged in user. I don't foresee it being much of a problem, but I do want to
+		// check it out before slapping some code here. Until then, we'll just return an
+		// unsupported response code.
+		return nil, sftp.ErrSshFxOpUnsupported
+	}
+}
+
+// Determines if a user has permission to perform a specific action on the SFTP server. These
+// permissions are defined and returned by the Panel API.
+func (fs FileSystem) can(permission string) bool {
+	// Server owners and super admins have their permissions returned as '[*]' via the Panel
+	// API, so for the sake of speed do an initial check for that before iterating over the
+	// entire array of permissions.
+	if len(fs.Permissions) == 1 && fs.Permissions[0] == "*" {
+		return true
+	}
+
+	// Not the owner or an admin, loop over the permissions that were returned to determine
+	// if they have the passed permission.
+	for _, p := range fs.Permissions {
+		if p == permission {
+			return true
+		}
+	}
+
+	return false
+}

sftp/lister.go

@@ -0,0 +1,22 @@
+package sftp
+
+import (
+	"io"
+	"os"
+)
+
+type ListerAt []os.FileInfo
+
+// Returns the number of entries copied and an io.EOF error if we made it to the end of the file list.
+// Take a look at the pkg/sftp godoc for more information about how this function should work.
+func (l ListerAt) ListAt(f []os.FileInfo, offset int64) (int, error) {
+	if offset >= int64(len(l)) {
+		return 0, io.EOF
+	}
+
+	if n := copy(f, l[offset:]); n < len(f) {
+		return n, io.EOF
+	} else {
+		return n, nil
+	}
+}

sftp/server.go

@@ -1,118 +1,238 @@
 package sftp
 
 import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
 	"github.com/apex/log"
-	"github.com/pkg/errors"
+	"github.com/patrickmn/go-cache"
-	"github.com/pterodactyl/sftp-server"
+	"github.com/pkg/sftp"
 	"github.com/pterodactyl/wings/api"
-	"github.com/pterodactyl/wings/config"
+	"golang.org/x/crypto/ssh"
-	"github.com/pterodactyl/wings/server"
+	"io"
-	"go.uber.org/zap"
+	"io/ioutil"
-	"regexp"
+	"net"
+	"os"
+	"path"
+	"strings"
+	"time"
 )
 
-func Initialize(config *config.Configuration) error {
+type Settings struct {
-	c := &sftp_server.Server{
+	BasePath    string
-		User: sftp_server.SftpUser{
+	ReadOnly    bool
-			Uid: config.System.User.Uid,
+	BindPort    int
-			Gid: config.System.User.Gid,
+	BindAddress string
-		},
+}
-		Settings: sftp_server.Settings{
-			BasePath:         config.System.Data,
-			ReadOnly:         config.System.Sftp.ReadOnly,
-			BindAddress:      config.System.Sftp.Address,
-			BindPort:         config.System.Sftp.Port,
-		},
-		CredentialValidator: validateCredentials,
-		PathValidator: validatePath,
-		DiskSpaceValidator: validateDiskSpace,
-	}
 
-	if err := sftp_server.New(c); err != nil {
+type User struct {
-		return err
+	Uid int
-	}
+	Gid int
+}
 
-	c.ConfigureLogger(func() *zap.SugaredLogger {
+type Server struct {
-		return zap.S().Named("sftp")
+	cache *cache.Cache
-	})
 
-	// Initialize the SFTP server in a background thread since this is
+	Settings Settings
-	// a long running operation.
+	User     User
-	go func(instance *sftp_server.Server) {
+
-		if err := c.Initialize(); err != nil {
+	PathValidator      func(fs FileSystem, p string) (string, error)
-			log.WithField("subsystem", "sftp").WithField("error", errors.WithStack(err)).Error("failed to initialize SFTP subsystem")
+	DiskSpaceValidator func(fs FileSystem) bool
-		}
+
-	}(c)
+	// Validator function that is called when a user connects to the server. This should
+	// check against whatever system is desired to confirm if the given username and password
+	// combination is valid. If so, should return an authentication response.
+	CredentialValidator func(r api.SftpAuthRequest) (*api.SftpAuthResponse, error)
+}
+
+// Create a new server configuration instance.
+func New(c *Server) error {
+	c.cache = cache.New(5*time.Minute, 10*time.Minute)
 
 	return nil
 }
 
-func validatePath(fs sftp_server.FileSystem, p string) (string, error) {
+// Initialize the SFTP server and add a persistent listener to handle inbound SFTP connections.
-	s := server.GetServers().Find(func(server *server.Server) bool {
+func (c *Server) Initialize() error {
-		return server.Id() == fs.UUID
+	serverConfig := &ssh.ServerConfig{
-	})
+		NoClientAuth: false,
+		MaxAuthTries: 6,
+		PasswordCallback: func(conn ssh.ConnMetadata, pass []byte) (*ssh.Permissions, error) {
+			resp, err := c.CredentialValidator(api.SftpAuthRequest{
+				User:          conn.User(),
+				Pass:          string(pass),
+				IP:            conn.RemoteAddr().String(),
+				SessionID:     conn.SessionID(),
+				ClientVersion: conn.ClientVersion(),
+			})
 
-	if s == nil {
+			if err != nil {
-		return "", errors.New("no server found with that UUID")
+				return nil, err
+			}
+
+			sshPerm := &ssh.Permissions{
+				Extensions: map[string]string{
+					"uuid":        resp.Server,
+					"user":        conn.User(),
+					"permissions": strings.Join(resp.Permissions, ","),
+				},
+			}
+
+			return sshPerm, nil
+		},
 	}
 
-	return s.Filesystem.SafePath(p)
+	if _, err := os.Stat(path.Join(c.Settings.BasePath, ".sftp/id_rsa")); os.IsNotExist(err) {
-}
+		if err := c.generatePrivateKey(); err != nil {
-
+			return err
-func validateDiskSpace(fs sftp_server.FileSystem) bool {
+		}
-	s := server.GetServers().Find(func(server *server.Server) bool {
+	} else if err != nil {
-		return server.Id() == fs.UUID
+		return err
-	})
-
-	if s == nil {
-		return false
 	}
 
-	return s.Filesystem.HasSpaceAvailable()
+	privateBytes, err := ioutil.ReadFile(path.Join(c.Settings.BasePath, ".sftp/id_rsa"))
-}
-
-var validUsernameRegexp = regexp.MustCompile(`^(?i)(.+)\.([a-z0-9]{8})$`)
-
-// Validates a set of credentials for a SFTP login aganist Pterodactyl Panel and returns
-// the server's UUID if the credentials were valid.
-func validateCredentials(c sftp_server.AuthenticationRequest) (*sftp_server.AuthenticationResponse, error) {
-	log.WithFields(log.Fields{"subsystem": "sftp", "username": c.User}).Debug("validating credentials for SFTP connection")
-
-	f := log.Fields{
-		"subsystem": "sftp",
-		"username":  c.User,
-		"ip":        c.IP,
-	}
-
-	// If the username doesn't meet the expected format that the Panel would even recognize just go ahead
-	// and bail out of the process here to avoid accidentially brute forcing the panel if a bot decides
-	// to connect to spam username attempts.
-	if !validUsernameRegexp.MatchString(c.User) {
-		log.WithFields(f).Warn("failed to validate user credentials (invalid format)")
-
-		return nil, new(sftp_server.InvalidCredentialsError)
-	}
-
-	resp, err := api.NewRequester().ValidateSftpCredentials(c)
 	if err != nil {
-		if sftp_server.IsInvalidCredentialsError(err) {
+		return err
-			log.WithFields(f).Warn("failed to validate user credentials (invalid username or password)")
+	}
-		} else {
+
-			log.WithFields(f).Error("encountered an error while trying to validate user credentials")
+	private, err := ssh.ParsePrivateKey(privateBytes)
+	if err != nil {
+		return err
+	}
+
+	// Add our private key to the server configuration.
+	serverConfig.AddHostKey(private)
+
+	listener, err := net.Listen("tcp", fmt.Sprintf("%s:%d", c.Settings.BindAddress, c.Settings.BindPort))
+	if err != nil {
+		return err
+	}
+
+	log.WithField("host", c.Settings.BindAddress).WithField("port", c.Settings.BindPort).Info("sftp subsystem listening for connections")
+
+	for {
+		conn, _ := listener.Accept()
+		if conn != nil {
+			go c.AcceptInboundConnection(conn, serverConfig)
+		}
+	}
+}
+
+// Handles an inbound connection to the instance and determines if we should serve the request
+// or not.
+func (c Server) AcceptInboundConnection(conn net.Conn, config *ssh.ServerConfig) {
+	defer conn.Close()
+
+	// Before beginning a handshake must be performed on the incoming net.Conn
+	sconn, chans, reqs, err := ssh.NewServerConn(conn, config)
+	if err != nil {
+		return
+	}
+	defer sconn.Close()
+
+	go ssh.DiscardRequests(reqs)
+
+	for newChannel := range chans {
+		// If its not a session channel we just move on because its not something we
+		// know how to handle at this point.
+		if newChannel.ChannelType() != "session" {
+			newChannel.Reject(ssh.UnknownChannelType, "unknown channel type")
+			continue
 		}
 
-		return resp, err
+		channel, requests, err := newChannel.Accept()
+		if err != nil {
+			continue
+		}
+
+		// Channels have a type that is dependent on the protocol. For SFTP this is "subsystem"
+		// with a payload that (should) be "sftp". Discard anything else we receive ("pty", "shell", etc)
+		go func(in <-chan *ssh.Request) {
+			for req := range in {
+				ok := false
+
+				switch req.Type {
+				case "subsystem":
+					if string(req.Payload[4:]) == "sftp" {
+						ok = true
+					}
+				}
+
+				req.Reply(ok, nil)
+			}
+		}(requests)
+
+		// Configure the user's home folder for the rest of the request cycle.
+		if sconn.Permissions.Extensions["uuid"] == "" {
+			continue
+		}
+
+		// Create a new handler for the currently logged in user's server.
+		fs := c.createHandler(sconn)
+
+		// Create the server instance for the channel using the filesystem we created above.
+		server := sftp.NewRequestServer(channel, fs)
+
+		if err := server.Serve(); err == io.EOF {
+			server.Close()
+		}
 	}
-
+}
-	s := server.GetServers().Find(func(server *server.Server) bool {
+
-		return server.Id() == resp.Server
+// Creates a new SFTP handler for a given server. The directory argument should
-	})
+// be the base directory for a server. All actions done on the server will be
-
+// relative to that directory, and the user will not be able to escape out of it.
-	if s == nil {
+func (c Server) createHandler(sc *ssh.ServerConn) sftp.Handlers {
-		return resp, errors.New("no matching server with UUID found")
+	p := FileSystem{
-	}
+		UUID:          sc.Permissions.Extensions["uuid"],
-
+		Permissions:   strings.Split(sc.Permissions.Extensions["permissions"], ","),
-	s.Log().WithFields(f).Debug("credentials successfully validated and matched user to server instance")
+		ReadOnly:      c.Settings.ReadOnly,
-
+		Cache:         c.cache,
-	return resp, err
+		User:          c.User,
+		HasDiskSpace:  c.DiskSpaceValidator,
+		PathValidator: c.PathValidator,
+		logger: log.WithFields(log.Fields{
+			"subsystem": "sftp",
+			"username":  sc.User(),
+			"ip":        sc.RemoteAddr(),
+		}),
+	}
+
+	return sftp.Handlers{
+		FileGet:  p,
+		FilePut:  p,
+		FileCmd:  p,
+		FileList: p,
+	}
+}
+
+// Generates a private key that will be used by the SFTP server.
+func (c Server) generatePrivateKey() error {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return err
+	}
+
+	if err := os.MkdirAll(path.Join(c.Settings.BasePath, ".sftp"), 0755); err != nil {
+		return err
+	}
+
+	o, err := os.OpenFile(path.Join(c.Settings.BasePath, ".sftp/id_rsa"), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return err
+	}
+	defer o.Close()
+
+	pkey := &pem.Block{
+		Type:  "RSA PRIVATE KEY",
+		Bytes: x509.MarshalPKCS1PrivateKey(key),
+	}
+
+	if err := pem.Encode(o, pkey); err != nil {
+		return err
+	}
+
+	return nil
 }

sftp/sftp.go

@@ -0,0 +1,97 @@
+package sftp
+
+import (
+	"emperror.dev/errors"
+	"github.com/apex/log"
+	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/server"
+)
+
+var noMatchingServerError = errors.New("no matching server with that UUID was found")
+
+func Initialize(config config.SystemConfiguration) error {
+	s := &Server{
+		User: User{
+			Uid: config.User.Uid,
+			Gid: config.User.Gid,
+		},
+		Settings: Settings{
+			BasePath:    config.Data,
+			ReadOnly:    config.Sftp.ReadOnly,
+			BindAddress: config.Sftp.Address,
+			BindPort:    config.Sftp.Port,
+		},
+		CredentialValidator: validateCredentials,
+		PathValidator:       validatePath,
+		DiskSpaceValidator:  validateDiskSpace,
+	}
+
+	if err := New(s); err != nil {
+		return errors.WithStackIf(err)
+	}
+
+	// Initialize the SFTP server in a background thread since this is
+	// a long running operation.
+	go func(s *Server) {
+		if err := s.Initialize(); err != nil {
+			log.WithField("subsystem", "sftp").WithField("error", errors.WithStackIf(err)).Error("failed to initialize SFTP subsystem")
+		}
+	}(s)
+
+	return nil
+}
+
+func validatePath(fs FileSystem, p string) (string, error) {
+	s := server.GetServers().Find(func(server *server.Server) bool {
+		return server.Id() == fs.UUID
+	})
+
+	if s == nil {
+		return "", noMatchingServerError
+	}
+
+	return s.Filesystem().SafePath(p)
+}
+
+func validateDiskSpace(fs FileSystem) bool {
+	s := server.GetServers().Find(func(server *server.Server) bool {
+		return server.Id() == fs.UUID
+	})
+
+	if s == nil {
+		return false
+	}
+
+	return s.Filesystem().HasSpaceAvailable(true)
+}
+
+// Validates a set of credentials for a SFTP login against Pterodactyl Panel and returns
+// the server's UUID if the credentials were valid.
+func validateCredentials(c api.SftpAuthRequest) (*api.SftpAuthResponse, error) {
+	f := log.Fields{"subsystem": "sftp", "username": c.User, "ip": c.IP}
+
+	log.WithFields(f).Debug("validating credentials for SFTP connection")
+	resp, err := api.New().ValidateSftpCredentials(c)
+	if err != nil {
+		if api.IsInvalidCredentialsError(err) {
+			log.WithFields(f).Warn("failed to validate user credentials (invalid username or password)")
+		} else {
+			log.WithFields(f).Error("encountered an error while trying to validate user credentials")
+		}
+
+		return resp, err
+	}
+
+	s := server.GetServers().Find(func(server *server.Server) bool {
+		return server.Id() == resp.Server
+	})
+
+	if s == nil {
+		return resp, noMatchingServerError
+	}
+
+	s.Log().WithFields(f).Debug("credentials successfully validated and matched user to server instance")
+
+	return resp, err
+}

system/utils.go

@@ -0,0 +1,58 @@
+package system
+
+import (
+	"sync"
+	"sync/atomic"
+)
+
+type AtomicBool struct {
+	flag uint32
+}
+
+func (ab *AtomicBool) Set(v bool) {
+	i := 0
+	if v {
+		i = 1
+	}
+
+	atomic.StoreUint32(&ab.flag, uint32(i))
+}
+
+func (ab *AtomicBool) Get() bool {
+	return atomic.LoadUint32(&ab.flag) == 1
+}
+
+// AtomicString allows for reading/writing to a given struct field without having to worry
+// about a potential race condition scenario. Under the hood it uses a simple sync.RWMutex
+// to control access to the value.
+type AtomicString struct {
+	v  string
+	mu sync.RWMutex
+}
+
+func NewAtomicString(v string) *AtomicString {
+	return &AtomicString{v: v}
+}
+
+// Stores the string value passed atomically.
+func (as *AtomicString) Store(v string) {
+	as.mu.Lock()
+	as.v = v
+	as.mu.Unlock()
+}
+
+// Loads the string value and returns it.
+func (as *AtomicString) Load() string {
+	as.mu.RLock()
+	defer as.mu.RUnlock()
+	return as.v
+}
+
+func (as *AtomicString) UnmarshalText(b []byte) error {
+	as.Store(string(b))
+	return nil
+}
+
+func (as *AtomicString) MarshalText() ([]byte, error) {
+	return []byte(as.Load()), nil
+}