wings/server/backup.go

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package server
import (
"bufio"
"github.com/pkg/errors"
"github.com/pterodactyl/wings/api"
"github.com/pterodactyl/wings/server/backup"
"go.uber.org/zap"
"os"
"path"
)
// Notifies the panel of a backup's state and returns an error if one is encountered
// while performing this action.
func (s *Server) notifyPanelOfBackup(uuid string, ad *backup.ArchiveDetails, successful bool) error {
r := api.NewRequester()
rerr, err := r.SendBackupStatus(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", s.Uuid),
zap.Error(err),
)
return err
}
zap.S().Warnw(rerr.String(), zap.String("backup", uuid))
return errors.New(rerr.String())
}
return nil
}
// Get all of the ignored files for a server based on its .pteroignore file in the root.
func (s *Server) getServerwideIgnoredFiles() ([]string, error) {
var ignored []string
f, err := os.Open(path.Join(s.Filesystem.Path(), ".pteroignore"))
if err != nil {
if !os.IsNotExist(err) {
return nil, err
}
} else {
scanner := bufio.NewScanner(f)
for scanner.Scan() {
// Only include non-empty lines, for the sake of clarity...
if t := scanner.Text(); t != "" {
ignored = append(ignored, t)
}
}
if err := scanner.Err(); err != nil {
return nil, err
}
}
return ignored, nil
}
// Get the backup files to include when generating it.
func (s *Server) GetIncludedBackupFiles(ignored []string) (*backup.IncludedFiles, error) {
// If no ignored files are present in the request, check for a .pteroignore file in the root
// of the server files directory, and use that to generate the backup.
if len(ignored) == 0 {
if i, err := s.getServerwideIgnoredFiles(); err != nil {
zap.S().Warnw("failed to retrieve server ignored files", zap.String("server", s.Uuid), zap.Error(err))
} else {
ignored = i
}
}
// Get the included files based on the root path and the ignored files provided.
return s.Filesystem.GetIncludedFiles(s.Filesystem.Path(), ignored)
}
// Performs a server backup and then emits the event over the server websocket. We
// let the actual backup system handle notifying the panel of the status, but that
// won't emit a websocket event.
func (s *Server) Backup(b backup.BackupInterface) error {
// Get the included files based on the root path and the ignored files provided.
inc, err := s.GetIncludedBackupFiles(b.Ignored())
if err != nil {
return errors.WithStack(err)
}
ad, err := b.Generate(inc, s.Filesystem.Path())
if err != nil {
if notifyError := s.notifyPanelOfBackup(b.Identifier(), &backup.ArchiveDetails{}, false); notifyError != nil {
zap.S().Warnw("failed to notify panel of failed backup state", zap.String("backup", b.Identifier()), zap.Error(err))
}
return errors.WithStack(err)
}
// Try to notify the panel about the status of this backup. If for some reason this request
// fails, delete the archive from the daemon and return that error up the chain to the caller.
if notifyError := s.notifyPanelOfBackup(b.Identifier(), ad, true); notifyError != nil {
b.Remove()
return notifyError
}
// Emit an event over the socket so we can update the backup in realtime on
// the frontend for the server.
s.Events().PublishJson(BackupCompletedEvent+":"+b.Identifier(), map[string]interface{}{
"uuid": b.Identifier(),
"sha256_hash": ad.Checksum,
"file_size": ad.Size,
})
return nil
}