Remove pointless debug log

Fixes deadlocks that occurred when events were registered while other events were being unsubscribed and data was being flooded to these listeners. A complete mess, I hate this code, it is going to break again, but jesus I'm so tired.

.github/workflows/build-test.yml

@@ -17,7 +17,7 @@ jobs:
           go-version: '^1.15'
       
       - name: Build
-        run: GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -ldflags "-X github.com/pterodactyl/wings/system.Version=dev-${GIT_COMMIT:0:7}" -o build/wings_linux_amd64 -v wings.go
+        run: GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/pterodactyl/wings/system.Version=dev-${GIT_COMMIT:0:7}" -o build/wings_linux_amd64 -v wings.go
       
       - name: Test
         run: go test ./...

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
       - 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
       
       - name: Test
         run: go test ./...

README.md

@@ -1,16 +1,35 @@
-# 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.svg?style=flat-square&label=Discord)](https://pterodactyl.io/discord)
 
-```
+# 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 |
+| ------- | ----- |
+| [**BloomVPS**](https://bloomvps.com) | BloomVPS offers dedicated core VPS and Minecraft hosting with Ryzen 9 processors. With owned-hardware, we offer truly unbeatable prices on high-performance hosting. |
+| [**VersatileNode**](https://versatilenode.com/) | Looking to host a minecraft server, vps, or a website? VersatileNode is one of the most affordable hosting providers to provide quality yet cheap services with incredible support. |
+| [**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. |
+
+## 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

@@ -144,7 +144,7 @@ type RequestError struct {
 
 // 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)
+	return fmt.Sprintf("Error response from Panel: %s: %s (HTTP/%s)", re.Code, re.Detail, re.Status)
 }
 
 func (re *RequestError) String() string {

api/sftp_endpoints.go

@@ -2,11 +2,57 @@ package api
 
 import (
 	"encoding/json"
+	"github.com/apex/log"
 	"github.com/pkg/errors"
-	"github.com/pterodactyl/sftp-server"
+	"regexp"
 )
 
-func (r *PanelRequest) ValidateSftpCredentials(request sftp_server.AuthenticationRequest) (*sftp_server.AuthenticationResponse, error) {
+type SftpAuthRequest struct {
+	User          string `json:"username"`
+	Pass          string `json:"password"`
+	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 *PanelRequest) 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)
+	}
+
 	b, err := json.Marshal(request)
 	if err != nil {
 		return nil, err
@@ -22,7 +68,7 @@ func (r *PanelRequest) ValidateSftpCredentials(request sftp_server.Authenticatio
 
 	if r.HasError() {
 		if r.HttpResponseCode() >= 400 && r.HttpResponseCode() < 500 {
-			return nil, new(sftp_server.InvalidCredentialsError)
+			return nil, new(sftpInvalidCredentialsError)
 		}
 
 		rerr := errors.New(r.Error().String())
@@ -30,7 +76,7 @@ func (r *PanelRequest) ValidateSftpCredentials(request sftp_server.Authenticatio
 		return nil, rerr
 	}
 
-	response := new(sftp_server.AuthenticationResponse)
+	response := new(SftpAuthResponse)
 	body, _ := r.ReadBody()
 
 	if err := json.Unmarshal(body, response); err != nil {

cmd/diagnostics.go

@@ -66,7 +66,7 @@ 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,
 			},
 		},
@@ -82,7 +82,7 @@ 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)
 	if dockerErr == nil {
@@ -210,7 +210,7 @@ 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

@@ -27,7 +27,6 @@ import (
 	"github.com/pterodactyl/wings/sftp"
 	"github.com/pterodactyl/wings/system"
 	"github.com/spf13/cobra"
-	"go.uber.org/zap"
 )
 
 var configPath = config.DefaultLocation
@@ -133,15 +132,18 @@ func rootCmdRun(*cobra.Command, []string) {
 	config.SetDebugViaFlag(debug)
 
 	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 +160,7 @@ 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 {
@@ -218,9 +220,8 @@ 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
 	}
 
@@ -337,30 +338,22 @@ func Execute() error {
 // Configures the global logger for Zap so that we can call it from any location
 // in the code without having to pass around a logger instance.
 func configureLogging(logDir string, debug bool) error {
-	cfg := zap.NewProductionConfig()
+	if err := os.MkdirAll(path.Join(logDir, "/install"), 0700); err != nil {
-	if debug {
+		return errors.WithStack(err)
-		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"))
 	}
 
+	if debug {
 		log.SetLevel(log.DebugLevel)
+	} else {
+		log.SetLevel(log.InfoLevel)
+	}
+
 	log.SetHandler(multi.New(
 		cli.Default,
 		cli.New(w.File, false),

config/config.go

@@ -188,7 +188,7 @@ 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()

config/config_system.go

@@ -2,8 +2,11 @@ package config
 
 import (
 	"github.com/apex/log"
+	"github.com/pkg/errors"
+	"html/template"
 	"os"
 	"path"
+	"path/filepath"
 )
 
 // Defines basic system configuration settings.
@@ -33,11 +36,27 @@ 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"`
+
 	Sftp SftpConfiguration `yaml:"sftp"`
 }
 
@@ -49,9 +68,20 @@ func (sc *SystemConfiguration) ConfigureDirectories() error {
 		return err
 	}
 
-	log.WithField("path", sc.LogDirectory).Debug("ensuring log directory exists")
+	// There are a non-trivial number of users out there whose data directories are actually a
-	if err := os.MkdirAll(path.Join(sc.LogDirectory, "/install"), 0700); err != nil {
+	// symlink to another location on the disk. If we do not resolve that final destination at this
-		return err
+	// 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.WithStack(err)
+		}
+	} else if d != sc.Data {
+		sc.Data = d
 	}
 
 	log.WithField("path", sc.Data).Debug("ensuring server data directory exists")
@@ -72,6 +102,47 @@ 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.WithStack(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.WithStack(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.WithStack(err)
+	}
+	defer f.Close()
+
+	t, err := template.ParseFiles("templates/logrotate.tpl")
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	return errors.Wrap(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")

config/config_throttles.go

@@ -1,7 +1,7 @@
 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

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{}
 
@@ -50,16 +53,47 @@ 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{}{}
 	}
 

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/container.go

@@ -57,15 +57,21 @@ func (e *Environment) Attach() error {
 			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.WithStack(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.WithStack(err)).Error("error while copying environment output to console")
+		}
 	}(c)
 
 	return nil
@@ -137,6 +143,15 @@ func (e *Environment) Create() error {
 
 	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 +163,7 @@ 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",
@@ -158,10 +173,10 @@ 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
@@ -204,12 +219,6 @@ func (e *Environment) Create() error {
 	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
 
@@ -228,7 +237,7 @@ 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)
 
 	err := e.client.ContainerRemove(context.Background(), e.Id, types.ContainerRemoveOptions{
@@ -250,7 +259,7 @@ func (e *Environment) Destroy() error {
 	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 {
@@ -296,7 +305,7 @@ func (e *Environment) followOutput() error {
 // 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
+// TODO: local images
 func (e *Environment) ensureImageExists(image string) error {
 	// 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
@@ -362,7 +371,7 @@ 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

environment/docker/environment.go

@@ -13,7 +13,6 @@ import (
 )
 
 type Metadata struct {
-	Invocation string
 	Image string
 	Stop  *api.ProcessStopConfiguration
 }
@@ -71,12 +70,6 @@ func New(id string, m *Metadata, c *environment.Configuration) (*Environment, er
 	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 +103,7 @@ 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 +137,7 @@ 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)
@@ -155,7 +148,7 @@ 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) {
@@ -167,3 +160,19 @@ func (e *Environment) ExitState() (uint32, bool, error) {
 
 	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()
+}

environment/docker/power.go

@@ -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.Wrap(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
@@ -64,7 +64,7 @@ func (e *Environment) Start() error {
 
 	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
@@ -128,7 +128,7 @@ func (e *Environment) Stop() error {
 
 	if s == nil || s.Type == api.ProcessStopSignal {
 		if s == nil {
-			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)
@@ -217,7 +217,7 @@ func (e *Environment) Terminate(signal os.Signal) error {
 		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)
 
 	sig := strings.TrimSuffix(strings.TrimPrefix(signal.String(), "signal "), "ed")

environment/docker/state.go

@@ -27,7 +27,7 @@ func (e *Environment) setState(state string) error {
 	// Get the current state of the environment before changing it.
 	prevState := e.State()
 
-	// Emit the event to any listeners that are currently registeree.
+	// Emit the event to any listeners that are currently registered.
 	if prevState != state {
 		// If the state changed make sure we update the internal tracking to note that.
 		e.stMu.Lock()

environment/docker/stats.go

@@ -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 {
+	l := log.WithField("container_id", e.Id)
+
+	l.Debug("starting resource polling for container")
+	defer l.Debug("stopped resource polling for container")
+
 	if e.State() == environment.ProcessOfflineState {
-		return errors.New("attempting to enable resource polling on a stopped server instance")
+		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)
 	}
+	defer stats.Body.Close()
 
 	dec := json.NewDecoder(stats.Body)
 
@@ -35,7 +41,9 @@ 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.WithStack(err)).Warn("error while processing Docker stats output for container")
+				} else {
+					l.Debug("io.EOF encountered during stats decode, stopping polling...")
 				}
 
 				return nil
@@ -43,6 +51,7 @@ func (e *Environment) pollResources(ctx context.Context) error {
 
 			// Disable collection if the server is in an offline state and this process is still running.
 			if e.State() == environment.ProcessOfflineState {
+				l.Debug("process in offline state while resource polling is still active; stopping poll")
 				return nil
 			}
 
@@ -66,11 +75,14 @@ func (e *Environment) pollResources(ctx context.Context) error {
 				},
 			}
 
-			b, _ := json.Marshal(st)
+			if b, err := json.Marshal(st); err != nil {
+				l.WithField("error", errors.WithStack(err)).Warn("error while marshaling stats object for environment")
+			} else {
 				e.Events().Publish(environment.ResourceEvent, string(b))
 			}
 		}
 	}
+}
 
 // The "docker stats" CLI call does not return the same value as the types.MemoryStats.Usage
 // value which can be rather confusing to people trying to compare panel usage to

environment/docker/stream.go

@@ -7,8 +7,8 @@ import (
 	"encoding/json"
 	"github.com/docker/docker/api/types"
 	"github.com/pkg/errors"
-	"io"
+	"github.com/pterodactyl/wings/environment"
-	"os"
+	"strconv"
 )
 
 type dockerLogLine struct {
@@ -31,6 +31,15 @@ func (e *Environment) SendCommand(c string) error {
 		return errors.New("attempting to send command to non-attached instance")
 	}
 
+	if e.meta.Stop != nil {
+		// If the command being processed is the same as the process stop command then we want to mark
+		// 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.Events().Publish(environment.StateChangeEvent, environment.ProcessStoppingState)
+		}
+	}
+
 	_, err := e.stream.Conn.Write([]byte(c + "\n"))
 
 	return errors.WithStack(err)
@@ -38,44 +47,25 @@ func (e *Environment) SendCommand(c string) error {
 
 // 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.WithStack(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

@@ -24,6 +24,9 @@ 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 +89,6 @@ 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)
 }

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)
 	}
+
+	// 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

@@ -47,8 +47,12 @@ func (e *EventBus) Publish(topic string, data string) {
 		defer e.RUnlock()
 
 		if ch, ok := e.subscribers[t]; ok {
+			e := Event{Data: data, Topic: topic}
+
 			for channel := range ch {
-				channel <- Event{Data: data, Topic: topic}
+				go func(channel chan Event, e Event) {
+					channel <- e
+				}(channel, e)
 			}
 		}
 	}()
@@ -66,10 +70,11 @@ func (e *EventBus) PublishJson(topic string, data interface{}) error {
 }
 
 // Subscribe to an emitter topic using a channel.
-func (e *EventBus) Subscribe(topic string, ch chan Event) {
+func (e *EventBus) Subscribe(topics []string, ch chan Event) {
 	e.Lock()
 	defer e.Unlock()
 
+	for _, topic := range topics {
 		if _, exists := e.subscribers[topic]; !exists {
 			e.subscribers[topic] = make(map[chan Event]struct{})
 		}
@@ -81,16 +86,19 @@ func (e *EventBus) Subscribe(topic string, ch chan Event) {
 			e.subscribers[topic][ch] = struct{}{}
 		}
 	}
+}
 
 // Unsubscribe a channel from a given topic.
-func (e *EventBus) Unsubscribe(topic string, ch chan Event) {
+func (e *EventBus) Unsubscribe(topics []string, ch chan Event) {
 	e.Lock()
 	defer e.Unlock()
 
+	for _, topic := range topics {
 		if _, exists := e.subscribers[topic][ch]; exists {
 			delete(e.subscribers[topic], ch)
 		}
 	}
+}
 
 // Removes all of the event listeners for the server. This is used when a server
 // is being deleted to avoid a bunch of de-reference errors cropping up. Obviously

go.mod

@@ -2,14 +2,6 @@ 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 (
 	github.com/AlecAivazis/survey/v2 v2.1.0
 	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
@@ -32,6 +24,7 @@ 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/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
@@ -40,13 +33,13 @@ 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
 	github.com/iancoleman/strcase v0.0.0-20191112232945-16388991a334
 	github.com/icza/dyno v0.0.0-20200205103839-49cb13720835
 	github.com/imdario/mergo v0.3.8
+	github.com/karrick/godirwalk v1.16.1
 	github.com/klauspost/compress v1.10.10 // indirect
 	github.com/klauspost/pgzip v1.2.4
 	github.com/magefile/mage v1.10.0 // indirect
@@ -65,25 +58,18 @@ require (
 	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
@@ -92,5 +78,4 @@ 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 +1,14 @@
-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=
-github.com/AlecAivazis/survey/v2 v2.0.7/go.mod h1:mlizQTaPjnR4jcpwRSaSlkbsRfYFEyKgLQvYTzxxiHA=
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@@ -38,11 +31,8 @@ github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDa
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@@ -51,8 +41,6 @@ github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5
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-github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
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@@ -68,9 +56,6 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
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-github.com/buger/jsonparser v0.0.0-20191204142016-1a29609e0929/go.mod h1:tgcrVJ81GPSF0mz+0nu1Xaz0fazGPrmmJfJtxjbHhUQ=
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@@ -87,12 +72,8 @@ github.com/cobaugh/osrelease v0.0.0-20181218015638-a93a0a55a249 h1:R0IDH8daQ3lOD
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@@ -105,8 +86,6 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
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@@ -124,8 +103,6 @@ github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKoh
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@@ -147,26 +124,20 @@ github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
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+github.com/frankban/quicktest v1.10.2 h1:19ARM85nVi4xH7xPXuc5eM/udya5ieh7b/Sv+d844Tk=
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@@ -193,7 +164,6 @@ github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GO
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@@ -204,20 +174,16 @@ github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
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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 +192,25 @@ 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/googleapis/gax-go v2.0.0+incompatible/go.mod h1:SFVmujtThgffbyetf+mdk2eWhX2bMyUtNHzFKcPA9HY=
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@@ -257,7 +223,6 @@ github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH
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-github.com/gregjones/httpcache v0.0.0-20170920190843-316c5e0ff04e/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
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@@ -279,7 +244,6 @@ github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09
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-github.com/hashicorp/hcl v0.0.0-20170914154624-68e816d1c783/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
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@@ -295,9 +259,6 @@ 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=
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@@ -317,6 +278,8 @@ github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfV
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@@ -330,8 +293,6 @@ github.com/klauspost/compress v1.10.10/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdY
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-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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@@ -344,6 +305,8 @@ github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFB
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@@ -358,12 +321,10 @@ github.com/magefile/mage v1.9.0 h1:t3AU2wNwehMCW97vuqQLtw6puppWXHO+O2MHo5a50XE=
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@@ -371,7 +332,6 @@ github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaa
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@@ -400,7 +360,6 @@ github.com/mitchellh/go-testing-interface v1.0.0/go.mod h1:kRemZodwjscx+RGhAo8eI
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@@ -434,8 +393,6 @@ github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
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@@ -453,10 +410,8 @@ 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/performancecopilot/speed v3.0.0+incompatible/go.mod h1:/CLtqpZ5gBg1M9iaPbIdPPGyKcA8hKdoy6hAWba7Yac=
-github.com/pierrec/lz4 v1.0.1 h1:w6GMGWSsCI04fTM8wQRdnW74MuJISakuUU0onU0TYB4=
 github.com/pierrec/lz4 v1.0.2-0.20190131084431-473cd7ce01a1/go.mod h1:3/3N9NVKO0jef7pBehbT1qWhCMrIgbYNnFAZCqQ5LRc=
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@@ -469,12 +424,8 @@ github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
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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=
 github.com/pkg/profile v1.5.0 h1:042Buzk+NhDI+DeSAA62RwJL8VAuZUMQZUjCsRz1Mug=
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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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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -517,13 +468,7 @@ 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=
 github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a/go.mod h1:bCqnVzQkZxMG4s8nGwiZ5l3QUCyqpo9Y+/ZMZ9VjZe4=
-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=
 github.com/remeh/sizedwaitgroup v1.0.0 h1:VNGGFwNo/R5+MJBf6yrsr110p0m4/OX4S3DCy7Kyl5E=
 github.com/remeh/sizedwaitgroup v1.0.0/go.mod h1:3j2R4OIe/SeS6YDhICBy22RWjJC5eNCJ1V+9+NVNYlo=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
@@ -554,24 +499,17 @@ 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/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
-github.com/spf13/afero v0.0.0-20170901052352-ee1bd8ee15a1/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
-github.com/spf13/cast v1.1.0/go.mod h1:r2rcYCSwa1IExKTDiTfzaxqT2FNHs8hODu4LnUfgKEg=
 github.com/spf13/cast v1.3.0/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
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-github.com/spf13/cobra v0.0.7 h1:FfTH+vuMXOas8jmfb5/M7dzEYx7LpcLb7a0LPe34uOU=
-github.com/spf13/cobra v0.0.7/go.mod h1:/6GTrnGXV9HjY+aR4k0oJ5tcvakLuG6EuKReYlHNrgE=
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-github.com/spf13/jwalterweatherman v0.0.0-20170901151539-12bd96e66386/go.mod h1:cQK4TGJAtQXfYWX+Ddv3mKDzgVb68N+wFjFa4jdeBTo=
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-github.com/spf13/pflag v1.0.1-0.20170901120850-7aff26db30c1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.1/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
 github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/viper v1.0.0/go.mod h1:A8kyI5cUJhb8N+3pkfONlcEcZbueH6nhAm0Fq7SrnBM=
 github.com/spf13/viper v1.4.0/go.mod h1:PTJ7Z/lr49W6bUbkmS1V3by4uWynFiR9p7+dSq/yZzE=
 github.com/streadway/amqp v0.0.0-20190404075320-75d898a42a94/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
 github.com/streadway/amqp v0.0.0-20190827072141-edfb9018d271/go.mod h1:AZpEONHx3DKn8O/DFsRAY58/XVQiIPMTMB1SddzLXVw=
@@ -583,11 +521,11 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-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=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/tj/assert v0.0.0-20171129193455-018094318fb0 h1:Rw8kxzWo1mr6FSaYXjQELRe88y2KdfynXdnK72rdjtA=
 github.com/tj/assert v0.0.0-20171129193455-018094318fb0/go.mod h1:mZ9/Rh9oLWpLLDRpvE+3b7gP/C2YyLFYxNmcLnPTMe0=
+github.com/tj/assert v0.0.3 h1:Df/BlaZ20mq6kuai7f5z2TvPFiwC3xaWJSDQNiIS3Rk=
 github.com/tj/assert v0.0.3/go.mod h1:Ne6X72Q+TB1AteidzQncjw9PabbMp4PBMZ1k+vd1Pvk=
 github.com/tj/go-buffer v1.1.0/go.mod h1:iyiJpfFcR2B9sXu7KvjbT9fpM4mOelRSDTbntVj52Uc=
 github.com/tj/go-elastic v0.0.0-20171221160941-36157cbbebc2/go.mod h1:WjeM0Oo1eNAjXGDx2yma7uG2XoyRZTq1uv3M/o7imD0=
@@ -596,7 +534,6 @@ 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=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ugorji/go v1.1.7 h1:/68gy2h+1mWMrwZFeD1kQialdSzAb432dtpeJ42ovdo=
 github.com/ugorji/go v1.1.7/go.mod h1:kZn38zHttfInRq0xu/PH0az30d+z6vm202qpg1oXVMw=
@@ -612,7 +549,6 @@ 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=
@@ -623,23 +559,14 @@ go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
-go.uber.org/atomic v1.6.0 h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=
-go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
-go.uber.org/multierr v1.5.0 h1:KCa4XfM8CWFCpxXRGok+Q0SS/0XBhMDbHHGABQLvD2A=
-go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
 go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee h1:0mgffUl7nfd+FpvXMVz4IDEaUSmT1ysygQC7qYo7sG4=
 go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
-go.uber.org/zap v1.9.1 h1:XCJQEf3W6eZaVwhRBof6ImoYGJSITeKWsyeh3HFu/5o=
-go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
-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=
@@ -647,11 +574,8 @@ 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=
@@ -660,16 +584,11 @@ 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=
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 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=
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 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=
@@ -687,16 +606,11 @@ 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=
@@ -705,8 +619,6 @@ 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=
@@ -735,19 +647,15 @@ 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=
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 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
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 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=
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@@ -765,18 +673,11 @@ 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=
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-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=
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-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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-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=
@@ -784,13 +685,10 @@ 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=
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-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=
@@ -800,7 +698,6 @@ 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=
@@ -838,8 +735,6 @@ 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=
@@ -856,6 +751,7 @@ 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=
@@ -864,7 +760,5 @@ honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWh
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-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

@@ -26,14 +26,11 @@ 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"),
 		Suspended:      false,
 		Invocation:     getString(data, "invocation"),
+		SkipEggScripts: getBoolean(data, "skip_egg_scripts"),
 		Build: environment.Limits{
 			MemoryLimit: getInt(data, "build", "memory"),
 			Swap:        getInt(data, "build", "swap"),
@@ -117,7 +114,6 @@ func (i *Installer) Execute() {
 	}
 
 	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
@@ -139,3 +135,9 @@ func getInt(data []byte, key ...string) int64 {
 
 	return value
 }
+
+func getBoolean(data []byte, key ...string) bool {
+	value, _ := jsonparser.GetBoolean(data, key...)
+
+	return value
+}

parser/helpers.go

@@ -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.WithStack(err)
 	}
 
 	for _, v := range f.Replace {
 		value, err := f.LookupConfigurationValue(v)
 		if err != nil {
-			return nil, err
+			return nil, errors.WithStack(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.Wrap(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.Wrap(err, "unable to set config value at pathway: "+v.Match)
 			}
 		}
 	}
@@ -110,13 +118,91 @@ func (f *ConfigurationFile) IterateOverJson(data []byte) (*gabs.Container, error
 	return parsed, nil
 }
 
+// Regex used to check if there is an array element present in the given pathway by looking for something
+// along the lines of "something[1]" or "something[1].nestedvalue" as the path.
+var checkForArrayElement = regexp.MustCompile(`^([^\[\]]+)\[([\d]+)](\..+)?$`)
+
+// 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
+
+	matches := checkForArrayElement.FindStringSubmatch(path)
+	if len(matches) < 3 {
+		// Only update the value if the pathway actually exists in the configuration, otherwise
+		// do nothing.
+		if c.ExistsP(path) {
+			_, err = c.SetP(value, path)
+		}
+
+		return errors.WithStack(err)
+	}
+
+	i, _ := strconv.Atoi(matches[2])
+	// Find the array element "i" or try to create it if "i" is equal to 0 and is not found
+	// at the given path.
+	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.Wrap(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.Wrap(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.Wrap(err, "failed to find array element at 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)
+	}
+
+	if err != nil {
+		return errors.Wrap(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 != "" {
+	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.Exists(path) && strings.HasPrefix(cfr.IfValue, "regex:") {
+	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 {
@@ -130,22 +216,15 @@ func (cfr *ConfigurationFileReplacement) SetAtPathway(c *gabs.Container, path st
 		// 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)) {
-				_, err := c.SetP(r.ReplaceAllString(v, string(value)), path)
+			return setValueAtPath(c, path, r.ReplaceAllString(v, string(value)))
-
-				return err
 		}
 
 		return nil
-		} else {
+	} else if !c.ExistsP(path) || (c.ExistsP(path) && !bytes.Equal(c.Bytes(), []byte(cfr.IfValue))) {
-			if !c.Exists(path) || (c.Exists(path) && !bytes.Equal(c.Bytes(), []byte(cfr.IfValue))) {
 		return nil
 	}
-		}
-	}
 
-	_, err := c.SetP(cfr.getKeyValue(value), path)
+	return setValueAtPath(c, path, cfr.getKeyValue(value))
-
-	return err
 }
 
 // Looks up a configuration value on the Daemon given a dot-notated syntax.

parser/parser.go

@@ -3,7 +3,6 @@ package parser
 import (
 	"bufio"
 	"encoding/json"
-	"fmt"
 	"github.com/apex/log"
 	"github.com/beevik/etree"
 	"github.com/buger/jsonparser"
@@ -16,6 +15,7 @@ import (
 	"io/ioutil"
 	"os"
 	"regexp"
+	"strconv"
 	"strings"
 )
 
@@ -96,8 +96,7 @@ 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
@@ -163,7 +162,7 @@ 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 {
@@ -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.WithStack(err)
 	}
 
 	i := make(map[string]interface{})
 	if err := yaml.Unmarshal(b, &i); err != nil {
-		return err
+		return errors.WithStack(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.WithStack(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.WithStack(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.WithStack(err)
 	}
 
 	return ioutil.WriteFile(path, marshaled, 0644)
@@ -426,15 +425,46 @@ 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.WithStack(err)
 	}
 
+	var s strings.Builder
+
+	// Get any header comments from the file.
+	scanner := bufio.NewScanner(f2)
+	for scanner.Scan() {
+		text := scanner.Text()
+
+		if 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.WithStack(err)
+	}
+
+	// Decode the properties file.
+	p, err := properties.LoadFile(path, properties.UTF8)
+	if err != nil {
+		return errors.WithStack(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.WithStack(err)
 		}
 
 		v, ok := p.Get(replace.Match)
@@ -446,27 +476,32 @@ func (f *ConfigurationFile) parsePropertiesFile(path string) error {
 		}
 
 		if _, _, err := p.Set(replace.Match, data); err != nil {
-			return err
+			return errors.WithStack(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.WithStack(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
 	}
 

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_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.",
 			})

router/router_server.go

@@ -12,22 +12,30 @@ import (
 	"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)
@@ -78,7 +86,7 @@ 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 +142,13 @@ 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)
 }
 
@@ -168,7 +178,7 @@ func postServerReinstall(c *gin.Context) {
 	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"))
 

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.
@@ -46,20 +47,35 @@ 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 {
+		// I'm not entirely sure how likely this is to happen, however if we did manage to locate
+		// 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

@@ -149,6 +149,13 @@ func putServerRenameFiles(c *gin.Context) {
 	}
 
 	if err := g.Wait(); err != nil {
+		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).AbortWithServerError(c)
 		return
 	}
@@ -287,7 +294,7 @@ 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.",
 		})
@@ -361,7 +368,7 @@ func postServerUploadFiles(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 accept any file uploads.",
 		})
@@ -371,15 +378,15 @@ func postServerUploadFiles(c *gin.Context) {
 	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
 	}

router/router_system.go

@@ -71,7 +71,7 @@ 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

@@ -5,16 +5,16 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"encoding/hex"
-	"errors"
+	"github.com/apex/log"
 	"github.com/buger/jsonparser"
 	"github.com/gin-gonic/gin"
 	"github.com/mholt/archiver/v3"
+	"github.com/pkg/errors"
 	"github.com/pterodactyl/wings/api"
 	"github.com/pterodactyl/wings/config"
 	"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) {
@@ -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()
-		rerr, err := r.SendArchiveStatus(server.Id(), true)
+		rerr, err := r.SendArchiveStatus(s.Id(), true)
 		if rerr != nil || err != nil {
 			if err != nil {
-				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", rerr.String()).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)
 			if rerr != nil || err != nil {
 				if err != nil {
-					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", errors.WithStack(rerr)).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.WithStack(err)).Error("failed to create http request for archive transfer")
 			return
 		}
 
@@ -178,20 +167,22 @@ 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.WithStack(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.WithStack(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.WithStack(err)).WithField("status", res.StatusCode).Error("failed to request server archive")
+
 			return
 		}
 
@@ -202,12 +193,13 @@ func postTransfer(c *gin.Context) {
 		_, 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.WithStack(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.WithStack(err)).Warn("failed to remove old archive file")
+
 				return
 			}
 		}
@@ -215,7 +207,8 @@ 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.WithStack(err)).Error("failed to open archive on disk")
+
 			return
 		}
 
@@ -223,21 +216,24 @@ func postTransfer(c *gin.Context) {
 		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.WithStack(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.WithStack(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.WithStack(err)).Error("failed to open archive on disk")
 			return
 		}
 
@@ -245,35 +241,35 @@ func postTransfer(c *gin.Context) {
 		hash := sha256.New()
 		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.WithStack(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.WithStack(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.WithStack(err)).Error("failed to validate received server data")
 			return
 		}
 
@@ -285,7 +281,7 @@ func postTransfer(c *gin.Context) {
 
 		// Un-archive the archive. That sounds weird..
 		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.WithStack(err)).Error("failed to extract server archive")
 			return
 		}
 
@@ -300,15 +296,16 @@ func postTransfer(c *gin.Context) {
 		rerr, err := api.NewRequester().SendTransferSuccess(serverID)
 		if rerr != nil || err != nil {
 			if err != nil {
-				zap.S().Errorw("failed to notify panel with transfer success", zap.String("server", serverID), zap.Error(err))
+				l.WithField("error", errors.WithStack(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", errors.WithStack(rerr)).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/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})
 				}
 			}
@@ -36,10 +36,7 @@ func (h *Handler) ListenForExpiration(ctx context.Context) {
 	}
 }
 
-// Listens for different events happening on a server and sends them along
+var e = []string{
-// to the connected websocket.
-func (h *Handler) ListenForServerEvents(ctx context.Context) {
-	e := []string{
 	server.StatsEvent,
 	server.StatusEvent,
 	server.ConsoleOutputEvent,
@@ -50,24 +47,26 @@ func (h *Handler) ListenForServerEvents(ctx context.Context) {
 	server.BackupCompletedEvent,
 }
 
-	eventChannel := make(chan events.Event)
+// Listens for different events happening on a server and sends them along
-	for _, event := range e {
+// to the connected websocket.
-		h.server.Events().Subscribe(event, eventChannel)
+func (h *Handler) ListenForServerEvents(ctx context.Context) {
-	}
+	h.server.Log().Debug("listening for server events over websocket")
 
-	for d := range eventChannel {
+	eventChannel := make(chan events.Event)
+	h.server.Events().Subscribe(e, eventChannel)
+
+	go func(ctx context.Context) {
 		select {
 		case <-ctx.Done():
-			for _, event := range e {
+			h.server.Events().Unsubscribe(e, eventChannel)
-				h.server.Events().Unsubscribe(event, eventChannel)
-			}
 
 			close(eventChannel)
-		default:
+		}
-			_ = h.SendJson(&Message{
+	}(ctx)
-				Event: d.Topic,
+
-				Args:  []string{d.Data},
+	for d := range eventChannel {
-			})
+		if err := h.SendJson(&Message{Event: d.Topic, Args: []string{d.Data}}); err != nil {
+			h.server.Log().WithField("error", err).Warn("error while sending server data over websocket")
 		}
 	}
 }

router/websocket/message.go

@@ -16,7 +16,7 @@ type Message struct {
 	//
 	// - 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.
+	// - power : Performs a power action against the server based the data.
 	// - command : Performs a command on a server using the data field.
 	Event string `json:"event"`
 

router/websocket/websocket.go

@@ -64,6 +64,10 @@ 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
 				}
@@ -91,6 +95,8 @@ func (h *Handler) SendJson(v *Message) error {
 	// Do not send JSON down the line if the JWT on the connection is not
 	// valid!
 	if err := h.TokenValid(); err != nil {
+		h.server.Log().WithField("error", err).Warn("invalid JWT detected for server websocket!")
+
 		return nil
 	}
 
@@ -153,9 +159,10 @@ 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()
+	expected := errors.Is(err, server.ErrSuspended) || errors.Is(err, server.ErrIsRunning)
 
 	message := "an unexpected error was encountered while handling this request"
-	if server.IsSuspendedError(err) || (j != nil && j.HasPermission(PermissionReceiveErrors)) {
+	if expected || (j != nil && j.HasPermission(PermissionReceiveErrors)) {
 		message = err.Error()
 	}
 
@@ -165,7 +172,7 @@ func (h *Handler) SendErrorJson(msg Message, err error, shouldLog ...bool) error
 	wsm.Args = []string{m}
 
 	if len(shouldLog) == 0 || (len(shouldLog) == 1 && shouldLog[0] == true) {
-		if !server.IsSuspendedError(err) {
+		if !expected {
 			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")
 		}
@@ -261,7 +268,7 @@ 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 +316,7 @@ func (h *Handler) HandleInbound(m Message) error {
 				return nil
 			}
 
-			logs, err := h.server.Environment.Readlog(1024 * 16)
+			logs, err := h.server.Environment.Readlog(100)
 			if err != nil {
 				return err
 			}

server/backup.go

@@ -20,13 +20,11 @@ func (s *Server) notifyPanelOfBackup(uuid string, ad *backup.ArchiveDetails, suc
 			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
 		}
 
-		s.Log().WithField("backup", uuid).Warn(rerr.String())
-
 		return errors.New(rerr.String())
 	}
 
@@ -90,7 +88,7 @@ func (s *Server) Backup(b backup.BackupInterface) error {
 		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 +100,7 @@ func (s *Server) Backup(b backup.BackupInterface) error {
 			"file_size":     0,
 		})
 
-		return errors.WithStack(err)
+		return errors.Wrap(err, "error while generating server backup")
 	}
 
 	// Try to notify the panel about the status of this backup. If for some reason this request

server/backup/archiver.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"github.com/apex/log"
 	gzip "github.com/klauspost/pgzip"
+	"github.com/pkg/errors"
 	"github.com/remeh/sizedwaitgroup"
 	"golang.org/x/sync/errgroup"
 	"io"
@@ -25,7 +26,7 @@ type Archive struct {
 func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
 	f, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 	defer f.Close()
 
@@ -49,23 +50,17 @@ func (a *Archive) Create(dst string, ctx context.Context) (os.FileInfo, error) {
 	// Iterate over all of the files to be included and put them into the archive. This is
 	// done as a concurrent goroutine to speed things along. If an error is encountered at
 	// any step, the entire process is aborted.
-	for p, s := range a.Files.All() {
+	for _, p := range a.Files.All() {
-		if (*s).IsDir() {
+		p := p
-			continue
-		}
-
-		pa := p
-		st := s
-
 		g.Go(func() error {
 			wg.Add()
 			defer wg.Done()
 
 			select {
 			case <-ctx.Done():
-				return ctx.Err()
+				return errors.WithStack(ctx.Err())
 			default:
-				return a.addToArchive(pa, st, tw)
+				return a.addToArchive(p, tw)
 			}
 		})
 	}
@@ -80,33 +75,48 @@ 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 nil, errors.WithStack(err)
 	}
 
 	st, err := f.Stat()
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	return st, nil
 }
 
 // Adds a single file to the existing tar archive writer.
-func (a *Archive) addToArchive(p string, s *os.FileInfo, w *tar.Writer) error {
+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.WithStack(err)
 	}
 	defer f.Close()
 
-	st := *s
+	s, err := f.Stat()
+	if err != nil {
+		// Same as above, don't kill the process just because the file no longer exists.
+		if os.IsNotExist(err) {
+			return nil
+		}
+
+		return errors.WithStack(err)
+	}
+
 	header := &tar.Header{
 		// Trim the long server path from the name of the file so that the resulting
 		// archive is exactly how the user would see it in the panel file manager.
 		Name:    strings.TrimPrefix(p, a.TrimPrefix),
-		Size:    st.Size(),
+		Size:    s.Size(),
-		Mode:    int64(st.Mode()),
+		Mode:    int64(s.Mode()),
-		ModTime: st.ModTime(),
+		ModTime: s.ModTime(),
 	}
 
 	// These actions must occur sequentially, even if this function is called multiple
@@ -115,12 +125,12 @@ func (a *Archive) addToArchive(p string, s *os.FileInfo, w *tar.Writer) error {
 	defer a.Unlock()
 
 	if err := w.WriteHeader(header); err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 
 	buf := make([]byte, 4*1024)
 	if _, err := io.CopyBuffer(w, f, buf); err != nil {
-		return err
+		return errors.WithStack(err)
 	}
 
 	return nil

server/backup/backup_local.go

@@ -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.WithStack(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
@@ -48,7 +48,7 @@ func (b *LocalBackup) Generate(included *IncludedFiles, prefix string) (*Archive
 	}
 
 	if _, err := a.Create(b.Path(), context.Background()); err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	return b.Details(), nil

server/backup/backup_s3.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"github.com/apex/log"
+	"github.com/pkg/errors"
 	"io"
 	"net/http"
 	"os"
@@ -33,17 +34,17 @@ func (s *S3Backup) Generate(included *IncludedFiles, prefix string) (*ArchiveDet
 	}
 
 	if _, err := a.Create(s.Path(), context.Background()); err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 
 	rc, err := os.Open(s.Path())
 	if err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	}
 	defer rc.Close()
 
 	if resp, err := s.generateRemoteRequest(rc); err != nil {
-		return nil, err
+		return nil, errors.WithStack(err)
 	} else {
 		resp.Body.Close()
 

server/backup/included.go

@@ -1,29 +1,23 @@
 package backup
 
 import (
-	"os"
 	"sync"
 )
 
 type IncludedFiles struct {
 	sync.RWMutex
-	files map[string]*os.FileInfo
+	files []string
 }
 
 // Pushes an additional file or folder onto the struct.
-func (i *IncludedFiles) Push(info *os.FileInfo, p string) {
+func (i *IncludedFiles) Push(p string) {
 	i.Lock()
-	defer i.Unlock()
+	i.files = append(i.files, p) // ~~
-
+	i.Unlock()
-	if i.files == nil {
-		i.files = make(map[string]*os.FileInfo)
-	}
-
-	i.files[p] = info
 }
 
 // Returns all of the files that were marked as being included.
-func (i *IncludedFiles) All() map[string]*os.FileInfo {
+func (i *IncludedFiles) All() []string {
 	i.RLock()
 	defer i.RUnlock()
 

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 +47,20 @@ func (s *Server) Config() *Configuration {
 	return &s.cfg
 }
 
+func (s *Server) DiskSpace() int64 {
+	s.cfg.mu.RLock()
+	defer s.cfg.mu.RUnlock()
+
+	return s.cfg.Build.DiskSpace
+}
+
+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

@@ -96,7 +96,6 @@ func (s *Server) Throttler() *ConsoleThrottler {
 	}
 }
 
-
 // Sends output to the server console formatted to appear correctly as being sent
 // from Wings.
 func (s *Server) PublishConsoleOutputFromDaemon(data string) {

server/crash.go

@@ -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.
 //

server/errors.go

@@ -1,17 +1,9 @@
 package server
 
-type suspendedError struct {
+import "github.com/pkg/errors"
-}
 
-func (e *suspendedError) Error() string {
+var ErrIsRunning = errors.New("server is running")
-	return "server is currently in a suspended state"
+var ErrSuspended = errors.New("server is currently in a suspended state")
-}
-
-func IsSuspendedError(err error) bool {
-	_, ok := err.(*suspendedError)
-
-	return ok
-}
 
 type crashTooFrequent struct {
 }

server/filesystem.go

@@ -6,6 +6,7 @@ import (
 	"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"
@@ -21,6 +22,7 @@ import (
 	"strings"
 	"sync"
 	"sync/atomic"
+	"syscall"
 	"time"
 )
 
@@ -39,10 +41,12 @@ func IsPathResolutionError(err error) bool {
 }
 
 type Filesystem struct {
-	mu sync.RWMutex
+	mu           sync.Mutex
+	lookupTimeMu sync.RWMutex
 
 	lastLookupTime   time.Time
-	diskUsage      int64
+	lookupInProgress int32
+	disk             int64
 
 	Server *Server
 }
@@ -180,14 +184,14 @@ func (fs *Filesystem) ParallelSafePath(paths []string) ([]string, error) {
 		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.
+		// 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 programatically continue deeper into directories, or stop digging
+				// 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
@@ -204,15 +208,20 @@ func (fs *Filesystem) ParallelSafePath(paths []string) ([]string, error) {
 	return cleaned, g.Wait()
 }
 
+type SpaceCheckingOpts struct {
+	AllowStaleResponse bool
+}
+
 // 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 {
+//
-	space := fs.Server.Build().DiskSpace
+// This operation will potentially block unless allowStaleValue is set to true. See the
-
+// documentation on DiskUsage for how this affects the call.
-	size, err := fs.getCachedDiskUsage()
+func (fs *Filesystem) HasSpaceAvailable(allowStaleValue bool) bool {
+	size, err := fs.DiskUsage(allowStaleValue)
 	if err != nil {
 		fs.Server.Log().WithField("error", err).Warn("failed to determine root server directory size")
 	}
@@ -221,6 +230,7 @@ func (fs *Filesystem) HasSpaceAvailable() bool {
 	// been allocated.
 	fs.Server.Proc().SetDisk(size)
 
+	space := fs.Server.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
@@ -237,19 +247,52 @@ func (fs *Filesystem) HasSpaceAvailable() bool {
 // 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) {
+//
+// 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) {
+	// Check if cache is expired.
+	fs.lookupTimeMu.RLock()
+	isValidInCache := fs.lastLookupTime.After(time.Now().Add(time.Second * time.Duration(-1*config.Get().System.DiskCheckInterval)))
+	fs.lookupTimeMu.RUnlock()
+
+	if !isValidInCache {
+		// 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 atomic.LoadInt32(&fs.lookupInProgress) == 0 {
+			// 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 {
+					fs.Server.Log().WithField("error", errors.WithStack(err)).Warn("failed to determine disk usage in go-routine")
+				}
+			}(fs)
+		}
+	}
+
+	// Return the currently cached value back to the calling function.
+	return atomic.LoadInt64(&fs.disk), 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.
-	//
-	// 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()
 
-	if fs.lastLookupTime.After(time.Now().Add(time.Second * -60)) {
+	// Signal that we're currently updating the disk size so that other calls to the disk checking
-		return fs.diskUsage, nil
+	// functions can determine if they should queue up additional calls to this function. Ensure that
-	}
+	// we always set this back to 0 when this process is done executing.
+	atomic.StoreInt32(&fs.lookupInProgress, 1)
+	defer atomic.StoreInt32(&fs.lookupInProgress, 0)
 
 	// 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
@@ -260,8 +303,11 @@ func (fs *Filesystem) getCachedDiskUsage() (int64, error) {
 	// 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.lookupTimeMu.Lock()
 	fs.lastLookupTime = time.Now()
-	atomic.StoreInt64(&fs.diskUsage, size)
+	fs.lookupTimeMu.Unlock()
+
+	atomic.StoreInt64(&fs.disk, size)
 
 	return size, err
 }
@@ -270,20 +316,40 @@ func (fs *Filesystem) getCachedDiskUsage() (int64, error) {
 // 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) {
-	var size int64
+	d, err := fs.SafePath(dir)
-	err := fs.Walk(dir, func(_ string, f os.FileInfo, err error) error {
 	if err != nil {
-			return fs.handleWalkerError(err, f)
+		return 0, errors.WithStack(err)
 	}
 
-		if !f.IsDir() {
+	var size int64
-			atomic.AddInt64(&size, f.Size())
+	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, err
+	return size, errors.WithStack(err)
 }
 
 // Reads a file on the system and returns it as a byte representation in a file
@@ -346,7 +412,7 @@ func (fs *Filesystem) Writefile(p string, r io.Reader) error {
 	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)
+	atomic.AddInt64(&fs.disk, sz-currentSize)
 
 	// Finally, chown the file to ensure the permissions don't end up out-of-whack
 	// if we had just created it.
@@ -442,17 +508,22 @@ func (fs *Filesystem) Rename(from string, to string) error {
 		return errors.WithStack(err)
 	}
 
-	if f, err := os.Stat(cleanedFrom); err != nil {
+	// If the target file or directory already exists the rename function will fail, so just
-		return errors.WithStack(err)
+	// bail out now.
-	} else {
+	if _, err := os.Stat(cleanedTo); err == nil {
-		d := cleanedTo
+		return os.ErrExist
-		if !f.IsDir() {
-			d = strings.TrimSuffix(d, path.Base(cleanedTo))
 	}
 
-		// Ensure that the directory we're moving into exists correctly on the system.
+	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, 0644); mkerr != nil {
-			return errors.WithStack(mkerr)
+			return errors.Wrap(mkerr, "failed to create directory structure for file rename")
 		}
 	}
 
@@ -485,19 +556,22 @@ func (fs *Filesystem) Chown(path string) error {
 
 	// 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 fs.Walk(cleaned, func(path string, f os.FileInfo, err error) error {
+	return godirwalk.Walk(cleaned, &godirwalk.Options{
-		if err != nil {
+		Unsorted: true,
-			return fs.handleWalkerError(err, f)
+		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 f.Mode()&os.ModeSymlink != 0 {
+			if e.IsSymlink() {
+				if e.IsDir() {
+					return godirwalk.SkipThis
+				}
+
 				return nil
 			}
 
-		return os.Chown(path, uid, gid)
+			return os.Chown(p, uid, gid)
+		},
 	})
 }
 
@@ -574,7 +648,8 @@ func (fs *Filesystem) Copy(p string) error {
 	}
 	defer dest.Close()
 
-	if _, err := io.Copy(dest, source); err != nil {
+	buf := make([]byte, 1024*4)
+	if _, err := io.CopyBuffer(dest, source, buf); err != nil {
 		return errors.WithStack(err)
 	}
 
@@ -584,7 +659,7 @@ func (fs *Filesystem) Copy(p string) error {
 // 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
+	// 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.
@@ -609,11 +684,11 @@ func (fs *Filesystem) Delete(p string) error {
 		}
 	} else {
 		if !st.IsDir() {
-			atomic.SwapInt64(&fs.diskUsage, -st.Size())
+			atomic.SwapInt64(&fs.disk, -st.Size())
 		} else {
 			go func(st os.FileInfo, resolved string) {
 				if s, err := fs.DirectorySize(resolved); err == nil {
-					atomic.AddInt64(&fs.diskUsage, -s)
+					atomic.AddInt64(&fs.disk, -s)
 				}
 			}(st, resolved)
 		}
@@ -732,26 +807,38 @@ func (fs *Filesystem) GetIncludedFiles(dir string, ignored []string) (*backup.In
 	// files found, and will keep walking deeper and deeper into directories.
 	inc := new(backup.IncludedFiles)
 
-	if err := fs.Walk(cleaned, func(p string, f os.FileInfo, err error) error {
+	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 {
-			return fs.handleWalkerError(err, f)
+					if IsPathResolutionError(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(p, fs.Path()+"/")) {
+				if len(ignored) == 0 || !i.MatchesPath(strings.TrimPrefix(sp, fs.Path()+"/")) {
-			inc.Push(&f, p)
+					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
-	}); err != nil {
+		},
-		return nil, err
+	})
-	}
 
-	return inc, nil
+	return inc, errors.WithStack(err)
 }
 
 // Compresses all of the files matching the given paths in the specified directory. This function
@@ -788,24 +875,38 @@ func (fs *Filesystem) CompressFiles(dir string, paths []string) (os.FileInfo, er
 			continue
 		}
 
-		if f.IsDir() {
+		if !f.IsDir() {
-			err := fs.Walk(p, func(s string, info os.FileInfo, err error) error {
+			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 {
-					return fs.handleWalkerError(err, info)
+							if IsPathResolutionError(err) {
+								return godirwalk.SkipThis
 							}
 
-				if !info.IsDir() {
+							return err
-					inc.Push(&info, s)
+						}
+					}
+
+					if !e.IsDir() {
+						inc.Push(sp)
 					}
 
 					return nil
+				},
 			})
 
 			if err != nil {
 				return nil, err
 			}
-		} else {
-			inc.Push(&f, p)
 		}
 	}
 

server/filesystem_darwin.go

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

server/filesystem_linux.go

@@ -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.Ctim.Sec, st.Ctim.Nsec)
 }

server/filesystem_unarchive.go

@@ -10,7 +10,6 @@ import (
 	"os"
 	"path/filepath"
 	"reflect"
-	"sync"
 	"sync/atomic"
 )
 
@@ -19,7 +18,7 @@ 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.Server.DiskSpace() <= 0 {
 		return true, nil
 	}
 
@@ -28,37 +27,19 @@ 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.
-	go func() {
-		wg.Add(1)
-		defer wg.Done()
-
-		// Walk all of the files and calculate the total decompressed size of this archive.
 	archiver.Walk(source, func(f archiver.File) error {
 		atomic.AddInt64(&size, f.Size())
 
 		return nil
 	})
-	}()
 
-	wg.Wait()
+	return ((dirSize + size) / 1000.0 / 1000.0) <= fs.Server.DiskSpace(), errors.WithStack(err)
-
-	return ((dirSize + size) / 1000.0 / 1000.0) <= fs.Server.Build().DiskSpace, cErr
 }
 
 // Decompress a file in a given directory by using the archiver tool to infer the file

server/filesystem_walker.go

@@ -1,141 +0,0 @@
-package server
-
-import (
-	"context"
-	"github.com/gammazero/workerpool"
-	"io/ioutil"
-	"os"
-	"path/filepath"
-	"runtime"
-	"sync"
-)
-
-type FileWalker struct {
-	*Filesystem
-}
-
-type PooledFileWalker struct {
-	wg       sync.WaitGroup
-	pool     *workerpool.WorkerPool
-	callback filepath.WalkFunc
-	cancel   context.CancelFunc
-
-	err     error
-	errOnce sync.Once
-
-	Filesystem *Filesystem
-}
-
-// Returns a new walker instance.
-func (fs *Filesystem) NewWalker() *FileWalker {
-	return &FileWalker{fs}
-}
-
-// Creates a new pooled file walker that will concurrently walk over a given directory but limit itself
-// to a worker pool as to not completely flood out the system or cause a process crash.
-func newPooledWalker(fs *Filesystem) *PooledFileWalker {
-	return &PooledFileWalker{
-		Filesystem: fs,
-		// Create a worker pool that is the same size as the number of processors available on the
-		// system. Going much higher doesn't provide much of a performance boost, and is only more
-		// likely to lead to resource overloading anyways.
-		pool: workerpool.New(runtime.NumCPU()),
-	}
-}
-
-// Process a given path by calling the callback function for all of the files and directories within
-// the path, and then dropping into any directories that we come across.
-func (w *PooledFileWalker) process(path string) error {
-	p, err := w.Filesystem.SafePath(path)
-	if err != nil {
-		return err
-	}
-
-	files, err := ioutil.ReadDir(p)
-	if err != nil {
-		return err
-	}
-
-	// Loop over all of the files and directories in the given directory and call the provided
-	// callback function. If we encounter a directory, push that directory onto the worker queue
-	// to be processed.
-	for _, f := range files {
-		sp, err := w.Filesystem.SafeJoin(p, f)
-		if err != nil {
-			// Let the callback function handle what to do if there is a path resolution error because a
-			// dangerous path was resolved. If there is an error returned, return from this entire process
-			// otherwise just skip over this specific file. We don't care if its a file or a directory at
-			// this point since either way we're skipping it, however, still check for the SkipDir since that
-			// would be thrown otherwise.
-			if err = w.callback(sp, f, err); err != nil && err != filepath.SkipDir {
-				return err
-			}
-
-			continue
-		}
-
-		i, err := os.Stat(sp)
-		// You might end up getting an error about a file or folder not existing if the given path
-		// if it is an invalid symlink. We can safely just skip over these files I believe.
-		if os.IsNotExist(err) {
-			continue
-		}
-
-		// Call the user-provided callback for this file or directory. If an error is returned that is
-		// not a SkipDir call, abort the entire process and bubble that error up.
-		if err = w.callback(sp, i, err); err != nil && err != filepath.SkipDir {
-			return err
-		}
-
-		// If this is a directory, and we didn't get a SkipDir error, continue through by pushing another
-		// job to the pool to handle it. If we requested a skip, don't do anything just continue on to the
-		// next item.
-		if i.IsDir() && err != filepath.SkipDir {
-			w.push(sp)
-		} else if !i.IsDir() && err == filepath.SkipDir {
-			// Per the spec for the callback, if we get a SkipDir error but it is returned for an item
-			// that is _not_ a directory, abort the remaining operations on the directory.
-			return nil
-		}
-	}
-
-	return nil
-}
-
-// Push a new path into the worker pool and increment the waitgroup so that we do not return too
-// early and cause panic's as internal directories attempt to submit to the pool.
-func (w *PooledFileWalker) push(path string) {
-	w.wg.Add(1)
-	w.pool.Submit(func() {
-		defer w.wg.Done()
-		if err := w.process(path); err != nil {
-			w.errOnce.Do(func() {
-				w.err = err
-				if w.cancel != nil {
-					w.cancel()
-				}
-			})
-		}
-	})
-}
-
-// Walks the given directory and executes the callback function for all of the files and directories
-// that are encountered.
-func (fs *Filesystem) Walk(dir string, callback filepath.WalkFunc) error {
-	w := newPooledWalker(fs)
-	w.callback = callback
-
-	_, cancel := context.WithCancel(context.Background())
-	w.cancel = cancel
-
-	w.push(dir)
-
-	w.wg.Wait()
-	w.pool.StopWait()
-
-	if w.err != nil {
-		return w.err
-	}
-
-	return nil
-}

server/install.go

@@ -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
+	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 {
@@ -190,7 +197,7 @@ func (ip *InstallationProcess) RemoveContainer() {
 	}
 }
 
-// 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)
@@ -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)
 		}
-	case <-sChann:
+	case <-sChan:
 	}
 
 	return r.ID, nil

server/listeners.go

@@ -8,6 +8,7 @@ import (
 	"github.com/pterodactyl/wings/environment"
 	"github.com/pterodactyl/wings/events"
 	"regexp"
+	"strconv"
 )
 
 // Adds all of the internal event listeners we want to use for a server.
@@ -16,15 +17,8 @@ func (s *Server) StartEventListeners() {
 	state := make(chan events.Event)
 	stats := make(chan events.Event)
 
-	s.Environment.Events().Subscribe(environment.ConsoleOutputEvent, console)
+	go func(console chan events.Event) {
-	s.Environment.Events().Subscribe(environment.StateChangeEvent, state)
+		for data := range console {
-	s.Environment.Events().Subscribe(environment.ResourceEvent, stats)
-
-	// TODO: this is leaky I imagine since the routines aren't destroyed when the server is?
-	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.
@@ -32,9 +26,21 @@ func (s *Server) StartEventListeners() {
 
 			// Also pass the data along to the console output channel.
 			s.onConsoleOutput(data.Data)
-			case data := <-state:
+		}
+
+		s.Log().Fatal("unexpected end-of-range for server console channel")
+	}(console)
+
+	go func(state chan events.Event) {
+		for data := range state {
 			s.SetState(data.Data)
-			case data := <-stats:
+		}
+
+		s.Log().Fatal("unexpected end-of-range for server state channel")
+	}(state)
+
+	go func(stats chan events.Event) {
+		for data := range 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")
@@ -46,15 +52,18 @@ func (s *Server) StartEventListeners() {
 			s.resources.Stats = *st
 			s.resources.mu.Unlock()
 
-				// TODO: we'll need to handle this better since calling it in rapid succession will
+			s.Filesystem.HasSpaceAvailable(true)
-				//  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()
 		}
-		}
+
-	}()
+		s.Log().Fatal("unexpected end-of-range for server stats channel")
+	}(stats)
+
+	s.Log().Info("registering event listeners: console, state, resources...")
+	s.Environment.Events().Subscribe([]string{environment.ConsoleOutputEvent}, console)
+	s.Environment.Events().Subscribe([]string{environment.StateChangeEvent}, state)
+	s.Environment.Events().Subscribe([]string{environment.ResourceEvent}, stats)
 }
 
 var stripAnsiRegex = regexp.MustCompile("[\u001B\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[a-zA-Z\\d]*)*)?\u0007)|(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PRZcf-ntqry=><~]))")
@@ -81,7 +90,7 @@ 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,

server/loader.go

@@ -93,7 +93,7 @@ func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
 	}
 
 	s.cfg = cfg
-	if err := s.UpdateDataStructure(data.Settings, false); err != nil {
+	if err := s.UpdateDataStructure(data.Settings); err != nil {
 		return nil, err
 	}
 
@@ -103,9 +103,14 @@ func FromConfiguration(data *api.ServerConfigurationResponse) (*Server, error) {
 	// 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,
 	}
 
@@ -123,7 +128,7 @@ 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 {
-		go s.Filesystem.HasSpaceAvailable()
+		s.Filesystem.HasSpaceAvailable(true)
 	}
 
 	return s, nil

server/power.go

@@ -3,6 +3,8 @@ package server
 import (
 	"context"
 	"github.com/pkg/errors"
+	"github.com/pterodactyl/wings/config"
+	"github.com/pterodactyl/wings/environment"
 	"golang.org/x/sync/semaphore"
 	"os"
 	"time"
@@ -86,6 +88,10 @@ 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 +99,7 @@ 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:
@@ -125,33 +131,47 @@ 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")
 	}
 
-	if !s.Filesystem.HasSpaceAvailable() {
+	// Disallow start & restart if the server is suspended. Do this check after performing a sync
+	// 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 errors.New("cannot start server, not enough disk space available")
 		}
+	}
 
 	// 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()
 
+	if config.Get().System.CheckPermissionsOnBoot {
 		s.PublishConsoleOutputFromDaemon("Ensuring file permissions are set correctly, this could take a few seconds...")
 		// Ensure all of the server file permissions are set correctly before booting the process.
 		if err := s.Filesystem.Chown("/"); err != nil {
 			return errors.Wrap(err, "failed to chown root server directory during pre-boot process")
 		}
+	}
 
 	return nil
 }

server/resources.go

@@ -39,10 +39,14 @@ func (s *Server) emitProcUsage() {
 	s.resources.mu.RLock()
 	defer s.resources.mu.RUnlock()
 
-	b, _ := json.Marshal(s.resources)
+	b, err := json.Marshal(s.resources)
+	if err == nil {
 		s.Events().Publish(StatsEvent, string(b))
 	}
 
+	// TODO: This might be a good place to add a debug log if stats are not sending.
+}
+
 // Returns the servers current state.
 func (ru *ResourceUsage) getInternalState() string {
 	ru.mu.RLock()

server/server.go

@@ -77,7 +77,7 @@ func (s *Server) GetEnvironmentVariables() []string {
 	var out = []string{
 		fmt.Sprintf("TZ=%s", zone),
 		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),
 	}
@@ -125,7 +125,7 @@ func (s *Server) Sync() 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)
 	}
 
@@ -144,7 +144,7 @@ func (s *Server) SyncWithConfiguration(cfg *api.ServerConfigurationResponse) err
 }
 
 // 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)
 }
 
@@ -156,7 +156,7 @@ 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.
@@ -177,10 +177,6 @@ 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()

server/update.go

@@ -15,7 +15,7 @@ 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)
@@ -80,6 +80,14 @@ func (s *Server) UpdateDataStructure(data []byte, background bool) error {
 		c.Suspended = v
 	}
 
+	if v, err := jsonparser.GetBoolean(data, "skip_egg_scripts"); err != nil {
+		if err != jsonparser.KeyPathNotFoundError {
+			return errors.WithStack(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)
+		}
 	}
 }

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 (
+	"github.com/apex/log"
+	"github.com/patrickmn/go-cache"
+	"github.com/pkg/errors"
+	"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.WithStack(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.WithStack(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.WithStack(err),
+			}).Error("error making path for file")
+
+			return nil, sftp.ErrSshFxFailure
+		}
+
+		file, err := os.Create(p)
+		if err != nil {
+			l.WithField("error", errors.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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.WithStack(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
+
+	// 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)
 }
-	}(c)
+
+// 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 {
-		return "", errors.New("no server found with that UUID")
-	}
-
-	return s.Filesystem.SafePath(p)
-}
-
-func validateDiskSpace(fs sftp_server.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()
-}
-
-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 nil, 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
+			sshPerm := &ssh.Permissions{
+				Extensions: map[string]string{
+					"uuid":        resp.Server,
+					"user":        conn.User(),
+					"permissions": strings.Join(resp.Permissions, ","),
+				},
 			}
 
-	s := server.GetServers().Find(func(server *server.Server) bool {
+			return sshPerm, nil
-		return server.Id() == resp.Server
+		},
-	})
-
-	if s == nil {
-		return resp, errors.New("no matching server with UUID found")
 	}
 
-	s.Log().WithFields(f).Debug("credentials successfully validated and matched user to server instance")
+	if _, err := os.Stat(path.Join(c.Settings.BasePath, ".sftp/id_rsa")); os.IsNotExist(err) {
-
+		if err := c.generatePrivateKey(); err != nil {
-	return resp, err
+			return err
+		}
+	} else if err != nil {
+		return err
+	}
+
+	privateBytes, err := ioutil.ReadFile(path.Join(c.Settings.BasePath, ".sftp/id_rsa"))
+	if err != nil {
+		return err
+	}
+
+	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
+		}
+
+		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()
+		}
+	}
+}
+
+// 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.
+func (c Server) createHandler(sc *ssh.ServerConn) sftp.Handlers {
+	p := FileSystem{
+		UUID:          sc.Permissions.Extensions["uuid"],
+		Permissions:   strings.Split(sc.Permissions.Extensions["permissions"], ","),
+		ReadOnly:      c.Settings.ReadOnly,
+		Cache:         c.cache,
+		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 (
+	"github.com/apex/log"
+	"github.com/pkg/errors"
+	"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.WithStack(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.WithStack(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.NewRequester().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
+}

templates/logrotate.tpl

@@ -0,0 +1,13 @@
+{{.LogDirectory}}/wings.log {
+    size 10M
+    compress
+    delaycompress
+    dateext
+    maxage 7
+    missingok
+    notifempty
+    create 0640 {{.User.Uid}} {{.User.Gid}}
+    postrotate
+        killall -SIGHUP wings
+    endscript
+}