Support one-time downloads of server backups
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parent
4ce2b73490
commit
4ad57af990
47
download_tokens.go
Normal file
47
download_tokens.go
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@ -0,0 +1,47 @@
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package main
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import (
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"github.com/gbrlsnchs/jwt/v3"
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cache2 "github.com/patrickmn/go-cache"
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"sync"
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"time"
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)
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type JWTokens struct {
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cache *cache2.Cache
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mutex *sync.Mutex
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}
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var _tokens *JWTokens
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type DownloadBackupPayload struct {
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jwt.Payload
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ServerUuid string `json:"server_uuid"`
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BackupUuid string `json:"backup_uuid"`
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UniqueId string `json:"unique_id"`
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}
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func getTokenStore() *JWTokens {
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if _tokens == nil {
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_tokens = &JWTokens{
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cache: cache2.New(time.Minute*60, time.Minute*5),
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mutex: &sync.Mutex{},
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}
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}
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return _tokens
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}
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// Determines if a given JWT unique token is valid.
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func (tokens *JWTokens) IsValidToken(token string) bool {
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tokens.mutex.Lock()
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defer tokens.mutex.Unlock()
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_, exists := tokens.cache.Get(token)
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if !exists {
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_tokens.cache.Add(token, "", time.Minute*60)
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}
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return !exists
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}
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1
http.go
1
http.go
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@ -613,6 +613,7 @@ func (rt *Router) ConfigureRouter() *httprouter.Router {
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})
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router.GET("/", rt.routeIndex)
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router.GET("/download/backup", rt.routeDownloadBackup)
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router.GET("/api/system", rt.AuthenticateToken(rt.routeSystemInformation))
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router.GET("/api/servers", rt.AuthenticateToken(rt.routeAllServers))
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router.GET("/api/servers/:server", rt.AuthenticateRequest(rt.routeServer))
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84
http_download.go
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84
http_download.go
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@ -0,0 +1,84 @@
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package main
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import (
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"bufio"
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"github.com/gbrlsnchs/jwt/v3"
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"github.com/julienschmidt/httprouter"
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"github.com/pterodactyl/wings/config"
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"go.uber.org/zap"
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"net/http"
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"os"
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"strconv"
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"strings"
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"time"
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)
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// Validates the provided JWT against the known secret for the Daemon and returns the
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// parsed data.
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func (rt *Router) parseBackupToken(token []byte) (*DownloadBackupPayload, error) {
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var payload DownloadBackupPayload
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if alg == nil {
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alg = jwt.NewHS256([]byte(config.Get().AuthenticationToken))
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}
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now := time.Now()
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verifyOptions := jwt.ValidatePayload(
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&payload.Payload,
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jwt.ExpirationTimeValidator(now),
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)
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_, err := jwt.Verify(token, alg, &payload, verifyOptions)
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if err != nil {
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return nil, err
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}
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return &payload, nil
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}
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func (rt *Router) routeDownloadBackup(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
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defer r.Body.Close()
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payload, err := rt.parseBackupToken([]byte(r.URL.Query().Get("token")))
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// Some type of payload issue with the JWT, bail out here.
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if err != nil {
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zap.S().Warnw("failed to validate token for downloading backup", zap.Error(err))
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http.Error(w, "failed to open backup for download", http.StatusForbidden)
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return
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}
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store := getTokenStore()
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// The one-time-token in the payload is no longer valid, request is likely a repeat
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// so block it.
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if ok := store.IsValidToken(payload.UniqueId); !ok {
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http.NotFound(w, r)
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return
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}
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s := rt.GetServer(payload.ServerUuid)
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p, st, err := s.LocateBackup(payload.BackupUuid)
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if err != nil {
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if !os.IsNotExist(err) && !strings.HasPrefix(err.Error(), "invalid archive found") {
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zap.S().Warnw("failed to locate a backup for download", zap.String("path", p), zap.String("server", s.Uuid), zap.Error(err))
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}
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http.NotFound(w, r)
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return
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}
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f, err := os.OpenFile(p, os.O_RDONLY, 0)
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if err != nil {
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zap.S().Errorw("failed to open file for reading", zap.String("path", ps.ByName("path")), zap.String("server", s.Uuid), zap.Error(err))
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http.Error(w, "failed to open backup for download", http.StatusInternalServerError)
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return
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}
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defer f.Close()
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w.Header().Set("Content-Length", strconv.Itoa(int(st.Size())))
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w.Header().Set("Content-Disposition", "attachment; filename="+st.Name())
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w.Header().Set("Content-Type", "application/octet-stream")
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bufio.NewReader(f).WriteTo(w)
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}
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@ -37,6 +37,23 @@ func (s *Server) NewBackup(data []byte) (*Backup, error) {
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return backup, nil
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}
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// Locates the backup for a server and returns the local path. This will obviously only
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// work if the backup was created as a local backup.
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func (s *Server) LocateBackup(uuid string) (string, os.FileInfo, error) {
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p := path.Join(config.Get().System.BackupDirectory, s.Uuid, uuid + ".tar.gz")
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st, err := os.Stat(p)
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if err != nil {
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return "", nil, err
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}
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if st.IsDir() {
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return "", nil, errors.New("invalid archive found; is directory")
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}
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return p, st, nil
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}
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// Ensures that the local backup destination for files exists.
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func (b *Backup) ensureLocalBackupLocation() error {
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if _, err := os.Stat(b.localDirectory); err != nil {
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