Break out the backup functions of the daemon in prep for S3 support

api/backup_endpoints.go

@@ -0,0 +1,35 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/pkg/errors"
+)
+
+type BackupRequest struct {
+	Checksum string `json:"checksum"`
+	Size     int64  `json:"size"`
+	Successful bool `json:"successful"`
+}
+
+// Notifies the panel that a specific backup has been completed and is now
+// available for a user to view and download.
+func (r *PanelRequest) SendBackupStatus(backup string, data BackupRequest) (*RequestError, error) {
+	b, err := json.Marshal(data)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	resp, err := r.Post(fmt.Sprintf("/backups/%s", backup), b)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+	defer resp.Body.Close()
+
+	r.Response = resp
+	if r.HasError() {
+		return r.Error(), nil
+	}
+
+	return nil, nil
+}

api/server_endpoints.go

@@ -203,29 +203,3 @@ func (r *PanelRequest) SendTransferSuccess(uuid string) (*RequestError, error) {
 
 	return nil, nil
 }
-
-type BackupRequest struct {
-	Successful bool `json:"successful"`
-	Sha256Hash string `json:"sha256_hash"`
-	FileSize int64 `json:"file_size"`
-}
-
-func (r *PanelRequest) SendBackupStatus(uuid string, backup string, data BackupRequest) (*RequestError, error) {
-	b, err := json.Marshal(data)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	resp, err := r.Post(fmt.Sprintf("/servers/%s/backup/%s", uuid, backup), b)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-	defer resp.Body.Close()
-
-	r.Response = resp
-	if r.HasError() {
-		return r.Error(), nil
-	}
-
-	return nil, nil
-}

router/router_download.go

@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"github.com/gin-gonic/gin"
 	"github.com/pterodactyl/wings/router/tokens"
+	"github.com/pterodactyl/wings/server/backup"
 	"net/http"
 	"os"
 	"strconv"
@@ -25,13 +26,20 @@ func getDownloadBackup(c *gin.Context) {
 		return
 	}
 
-	p, st, err := s.LocateBackup(token.BackupUuid)
+	b, st, err := backup.LocateLocal(token.BackupUuid)
 	if err != nil {
+		if os.IsNotExist(err) {
+			c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
+				"error": "The requested backup was not found on this server.",
+			})
+			return
+		}
+
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
-	f, err := os.Open(p)
+	f, err := os.Open(b.Path())
 	if err != nil {
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return

router/router_server_backup.go

@@ -3,26 +3,23 @@ package router
 import (
 	"github.com/gin-gonic/gin"
 	"github.com/pterodactyl/wings/server"
+	"github.com/pterodactyl/wings/server/backup"
 	"go.uber.org/zap"
 	"net/http"
-	"os"
 )
 
 // Backs up a server.
 func postServerBackup(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	var data struct{
+	data := &backup.Backup{}
-		Uuid string `json:"uuid"`
-		IgnoredFiles []string `json:"ignored_files"`
-	}
 	c.BindJSON(&data)
 
-	go func(backup *server.Backup) {
+	go func(b *backup.Backup, serv *server.Server) {
-		if err := backup.BackupAndNotify(); err != nil {
+		if err := serv.BackupRoot(b); err != nil {
 			zap.S().Errorw("failed to generate backup for server", zap.Error(err))
 		}
-	}(s.NewBackup(data.Uuid, data.IgnoredFiles))
+	}(data, s)
 
 	c.Status(http.StatusAccepted)
 }
@@ -31,13 +28,13 @@ func postServerBackup(c *gin.Context) {
 func deleteServerBackup(c *gin.Context) {
 	s := GetServer(c.Param("server"))
 
-	p, _, err := s.LocateBackup(c.Param("backup"))
+	b, _, err := backup.LocateLocal(c.Param("backup"))
 	if err != nil {
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}
 
-	if err := os.Remove(p); err != nil {
+	if err := b.Remove(); err != nil {
 		TrackedServerError(err, s).AbortWithServerError(c)
 		return
 	}

server/backup.go

@@ -1,210 +1,39 @@
 package server
 
 import (
-	"crypto/sha256"
-	"encoding/hex"
-	"github.com/mholt/archiver/v3"
 	"github.com/pkg/errors"
-	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/server/backup"
-	"github.com/pterodactyl/wings/config"
 	"go.uber.org/zap"
-	"io"
-	"os"
-	"path"
-	"strings"
-	"sync"
 )
 
-type Backup struct {
+// Performs a server backup and then emits the event over the server websocket. We
-	Uuid           string   `json:"uuid"`
+// let the actual backup system handle notifying the panel of the status, but that
-	IgnoredFiles   []string `json:"ignored_files"`
+// won't emit a websocket event.
-	server         *Server
+func (s *Server) BackupRoot(b *backup.Backup) error {
-	localDirectory string
+	r, err := b.LocalBackup(s.Filesystem.Path())
-}
-
-// Create a new Backup struct from data passed through in a request.
-func (s *Server) NewBackup(uuid string, ignore []string) *Backup {
-	return &Backup{
-		Uuid:           uuid,
-		IgnoredFiles:   ignore,
-		server:         s,
-		localDirectory: path.Join(config.Get().System.BackupDirectory, s.Uuid),
-	}
-}
-
-// Locates the backup for a server and returns the local path. This will obviously only
-// work if the backup was created as a local backup.
-func (s *Server) LocateBackup(uuid string) (string, os.FileInfo, error) {
-	p := path.Join(config.Get().System.BackupDirectory, s.Uuid, uuid+".tar.gz")
-
-	st, err := os.Stat(p)
 	if err != nil {
-		return "", nil, err
+		if notifyError := b.NotifyPanel(r, false); notifyError != nil {
+			zap.S().Warnw("failed to notify panel of failed backup state", zap.String("backup", b.Uuid), zap.Error(err))
 		}
 
-	if st.IsDir() {
-		return "", nil, errors.New("invalid archive found; is directory")
-	}
-
-	return p, st, nil
-}
-
-// Ensures that the local backup destination for files exists.
-func (b *Backup) ensureLocalBackupLocation() error {
-	if _, err := os.Stat(b.localDirectory); err != nil {
-		if !os.IsNotExist(err) {
-			return errors.WithStack(err)
-		}
-
-		return os.MkdirAll(b.localDirectory, 0700)
-	}
-
-	return nil
-}
-
-// Returns the path for this specific backup.
-func (b *Backup) GetPath() string {
-	return path.Join(b.localDirectory, b.Uuid+".tar.gz")
-}
-
-func (b *Backup) GetChecksum() ([]byte, error) {
-	h := sha256.New()
-
-	f, err := os.Open(b.GetPath())
-	if err != nil {
-		return []byte{}, errors.WithStack(err)
-	}
-	defer f.Close()
-
-	if _, err := io.Copy(h, f); err != nil {
-		return []byte{}, errors.WithStack(err)
-	}
-
-	return h.Sum(nil), nil
-}
-
-// Generates a backup of the selected files and pushes it to the defined location
-// for this instance.
-func (b *Backup) Backup() (*api.BackupRequest, error) {
-	rootPath := b.server.Filesystem.Path()
-
-	if err := b.ensureLocalBackupLocation(); err != nil {
-		return nil, errors.WithStack(err)
-	}
-
-	zap.S().Debugw("starting archive of server files for backup", zap.String("server", b.server.Uuid), zap.String("backup", b.Uuid))
-	if err := archiver.Archive([]string{rootPath}, b.GetPath()); err != nil {
-		if strings.HasPrefix(err.Error(), "file already exists") {
-			zap.S().Debugw("backup already exists on system, removing and re-attempting", zap.String("backup", b.Uuid))
-
-			if rerr := os.Remove(b.GetPath()); rerr != nil {
-				return nil, errors.WithStack(rerr)
-			}
-
-			// Re-attempt this backup.
-			return b.Backup()
-		}
-
-		// If there was some error with the archive, just go ahead and ensure the backup
-		// is completely destroyed at this point. Ignore any errors from this function.
-		os.Remove(b.GetPath())
-
-		return nil, err
-	}
-
-	wg := sync.WaitGroup{}
-	wg.Add(2)
-
-	var checksum string
-	// Calculate the checksum for the file.
-	go func() {
-		defer wg.Done()
-
-		resp, err := b.GetChecksum()
-		if err != nil {
-			zap.S().Errorw("failed to calculate checksum for backup", zap.String("backup", b.Uuid), zap.Error(err))
-		}
-
-		checksum = hex.EncodeToString(resp)
-	}()
-
-	var s int64
-	go func() {
-		defer wg.Done()
-
-		st, err := os.Stat(b.GetPath())
-		if err != nil {
-			return
-		}
-
-		s = st.Size()
-	}()
-
-	wg.Wait()
-
-	return &api.BackupRequest{
-		Successful: true,
-		Sha256Hash: checksum,
-		FileSize:   s,
-	}, nil
-}
-
-// Performs a server backup and then notifies the Panel of the completed status
-// so that the backup shows up for the user correctly.
-func (b *Backup) BackupAndNotify() error {
-	resp, err := b.Backup()
-	if err != nil {
-		b.notifyPanel(resp)
-
 		return errors.WithStack(err)
 	}
 
-	if err := b.notifyPanel(resp); err != nil {
+	// Try to notify the panel about the status of this backup. If for some reason this request
-		// These errors indicate that the Panel will not know about the status of this
+	// fails, delete the archive from the daemon and return that error up the chain to the caller.
-		// backup, so let's just go ahead and delete it, and let the Panel handle the
+	if notifyError := b.NotifyPanel(r, true); notifyError != nil {
-		// cleanup process for the backups.
+		b.Remove()
-		//
-		// @todo perhaps in the future we can sync the backups from the servers on boot?
-		os.Remove(b.GetPath())
 
-		return err
+		return notifyError
 	}
 
 	// Emit an event over the socket so we can update the backup in realtime on
 	// the frontend for the server.
-	b.server.Events().PublishJson(BackupCompletedEvent+":"+b.Uuid, map[string]interface{}{
+	s.Events().PublishJson(BackupCompletedEvent+":"+b.Uuid, map[string]interface{}{
 		"uuid":        b.Uuid,
-		"sha256_hash": resp.Sha256Hash,
+		"sha256_hash": r.Checksum,
-		"file_size":   resp.FileSize,
+		"file_size":   r.Size,
 	})
 
 	return nil
 }
-
-func (b *Backup) notifyPanel(request *api.BackupRequest) error {
-	r := api.NewRequester()
-
-	rerr, err := r.SendBackupStatus(b.server.Uuid, b.Uuid, *request)
-	if rerr != nil || err != nil {
-		if err != nil {
-			zap.S().Errorw(
-				"failed to notify panel of backup status due to internal code error",
-				zap.String("server", b.server.Uuid),
-				zap.String("backup", b.Uuid),
-				zap.Error(err),
-			)
-
-			return err
-		}
-
-		zap.S().Warnw(
-			rerr.String(),
-			zap.String("server", b.server.Uuid),
-			zap.String("backup", b.Uuid),
-		)
-
-		return errors.New(rerr.String())
-	}
-
-	return nil
-}

server/backup/backup.go

@@ -0,0 +1,103 @@
+package backup
+
+import (
+	"crypto/sha256"
+	"github.com/pkg/errors"
+	"github.com/pterodactyl/wings/api"
+	"github.com/pterodactyl/wings/config"
+	"go.uber.org/zap"
+	"io"
+	"os"
+	"path"
+)
+
+type Backup struct {
+	// The UUID of this backup object. This must line up with a backup from
+	// the panel instance.
+	Uuid string `json:"uuid"`
+
+	// An array of files to ignore when generating this backup. This should be
+	// compatible with a standard .gitignore structure.
+	IgnoredFiles []string `json:"ignored_files"`
+}
+
+type ArchiveDetails struct {
+	Checksum string `json:"checksum"`
+	Size     int64  `json:"size"`
+}
+
+// Returns a request object.
+func (ad *ArchiveDetails) ToRequest(successful bool) api.BackupRequest {
+	return api.BackupRequest{
+		Checksum:   ad.Checksum,
+		Size:       ad.Size,
+		Successful: successful,
+	}
+}
+
+// Returns the path for this specific backup.
+func (b *Backup) Path() string {
+	return path.Join(config.Get().System.BackupDirectory, b.Uuid+".tar.gz")
+}
+
+// Returns the SHA256 checksum of a backup.
+func (b *Backup) Checksum() ([]byte, error) {
+	h := sha256.New()
+
+	f, err := os.Open(b.Path())
+	if err != nil {
+		return []byte{}, errors.WithStack(err)
+	}
+	defer f.Close()
+
+	if _, err := io.Copy(h, f); err != nil {
+		return []byte{}, errors.WithStack(err)
+	}
+
+	return h.Sum(nil), nil
+}
+
+// Removes a backup from the system.
+func (b *Backup) Remove() error {
+	return os.Remove(b.Path())
+}
+
+// Notifies the panel of a backup's state and returns an error if one is encountered
+// while performing this action.
+func (b *Backup) NotifyPanel(ad *ArchiveDetails, successful bool) error {
+	r := api.NewRequester()
+
+	rerr, err := r.SendBackupStatus(b.Uuid, ad.ToRequest(successful))
+	if rerr != nil || err != nil {
+		if err != nil {
+			zap.S().Errorw(
+				"failed to notify panel of backup status due to internal code error",
+				zap.String("backup", b.Uuid),
+				zap.Error(err),
+			)
+
+			return err
+		}
+
+		zap.S().Warnw(rerr.String(), zap.String("backup", b.Uuid))
+
+		return errors.New(rerr.String())
+	}
+
+	return nil
+}
+
+// Ensures that the local backup destination for files exists.
+func (b *Backup) ensureLocalBackupLocation() error {
+	d := config.Get().System.BackupDirectory
+
+	if _, err := os.Stat(d); err != nil {
+		if !os.IsNotExist(err) {
+			return errors.WithStack(err)
+		}
+
+		return os.MkdirAll(d, 0700)
+	}
+
+	return nil
+}

server/backup/backup_local.go

@@ -0,0 +1,87 @@
+package backup
+
+import (
+	"encoding/hex"
+	"github.com/mholt/archiver/v3"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+	"os"
+	"strings"
+	"sync"
+)
+
+// Locates the backup for a server and returns the local path. This will obviously only
+// work if the backup was created as a local backup.
+func LocateLocal(uuid string) (*Backup, os.FileInfo, error) {
+	b := &Backup{
+		Uuid:         uuid,
+		IgnoredFiles: nil,
+	}
+
+	st, err := os.Stat(b.Path())
+	if err != nil {
+		return nil, nil, err
+	}
+
+	if st.IsDir() {
+		return nil, nil, errors.New("invalid archive found; is directory")
+	}
+
+	return b, st, nil
+}
+
+// Generates a backup of the selected files and pushes it to the defined location
+// for this instance.
+func (b *Backup) LocalBackup(dir string) (*ArchiveDetails, error) {
+	if err := archiver.Archive([]string{dir}, b.Path()); err != nil {
+		if strings.HasPrefix(err.Error(), "file already exists") {
+			if rerr := os.Remove(b.Path()); rerr != nil {
+				return nil, errors.WithStack(rerr)
+			}
+
+			// Re-attempt this backup by calling it with the same information.
+			return b.LocalBackup(dir)
+		}
+
+		// If there was some error with the archive, just go ahead and ensure the backup
+		// is completely destroyed at this point. Ignore any errors from this function.
+		os.Remove(b.Path())
+
+		return nil, err
+	}
+
+	wg := sync.WaitGroup{}
+	wg.Add(2)
+
+	var checksum string
+	// Calculate the checksum for the file.
+	go func() {
+		defer wg.Done()
+
+		resp, err := b.Checksum()
+		if err != nil {
+			zap.S().Errorw("failed to calculate checksum for backup", zap.String("backup", b.Uuid), zap.Error(err))
+		}
+
+		checksum = hex.EncodeToString(resp)
+	}()
+
+	var sz int64
+	go func() {
+		defer wg.Done()
+
+		st, err := os.Stat(b.Path())
+		if err != nil {
+			return
+		}
+
+		sz = st.Size()
+	}()
+
+	wg.Wait()
+
+	return &ArchiveDetails{
+		Checksum: checksum,
+		Size:     sz,
+	}, nil
+}