package main import ( "io" "net/http" "net/rpc" "strconv" router "github.com/gorilla/mux" ) // Storage server implements rpc primitives to facilitate exporting a // disk over a network. type storageServer struct { storage StorageAPI } /// Volume operations handlers // MakeVolHandler - make vol handler is rpc wrapper for MakeVol operation. func (s *storageServer) MakeVolHandler(arg *string, reply *GenericReply) error { err := s.storage.MakeVol(*arg) if err != nil { return err } return nil } // ListVolsHandler - list vols handler is rpc wrapper for ListVols operation. func (s *storageServer) ListVolsHandler(arg *string, reply *ListVolsReply) error { vols, err := s.storage.ListVols() if err != nil { return err } reply.Vols = vols return nil } // StatVolHandler - stat vol handler is a rpc wrapper for StatVol operation. func (s *storageServer) StatVolHandler(arg *string, reply *VolInfo) error { volInfo, err := s.storage.StatVol(*arg) if err != nil { return err } *reply = volInfo return nil } // DeleteVolHandler - delete vol handler is a rpc wrapper for // DeleteVol operation. func (s *storageServer) DeleteVolHandler(arg *string, reply *GenericReply) error { err := s.storage.DeleteVol(*arg) if err != nil { return err } return nil } /// File operations // StatFileHandler - stat file handler is rpc wrapper to stat file. func (s *storageServer) StatFileHandler(arg *StatFileArgs, reply *FileInfo) error { fileInfo, err := s.storage.StatFile(arg.Vol, arg.Path) if err != nil { return err } *reply = fileInfo return nil } // ListDirHandler - list directory handler is rpc wrapper to list dir. func (s *storageServer) ListDirHandler(arg *ListDirArgs, reply *[]string) error { entries, err := s.storage.ListDir(arg.Vol, arg.Path) if err != nil { return err } *reply = entries return nil } // DeleteFileHandler - delete file handler is rpc wrapper to delete file. func (s *storageServer) DeleteFileHandler(arg *DeleteFileArgs, reply *GenericReply) error { err := s.storage.DeleteFile(arg.Vol, arg.Path) if err != nil { return err } return nil } // RenameFileHandler - rename file handler is rpc wrapper to rename file. func (s *storageServer) RenameFileHandler(arg *RenameFileArgs, reply *GenericReply) error { err := s.storage.RenameFile(arg.SrcVol, arg.SrcPath, arg.DstVol, arg.DstPath) if err != nil { return err } return nil } // Initialize new storage rpc. func newRPCServer(exportPath string) (*storageServer, error) { // Initialize posix storage API. storage, err := newPosix(exportPath) if err != nil && err != errDiskNotFound { return nil, err } return &storageServer{ storage: storage, }, nil } // registerStorageRPCRouter - register storage rpc router. func registerStorageRPCRouter(mux *router.Router, stServer *storageServer) { storageRPCServer := rpc.NewServer() storageRPCServer.RegisterName("Storage", stServer) storageRouter := mux.NewRoute().PathPrefix(reservedBucket).Subrouter() // Add minio storage routes. storageRouter.Path("/storage").Handler(storageRPCServer) // StreamUpload - stream upload handler. storageRouter.Methods("POST").Path("/storage/upload/{volume}/{path:.+}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) { vars := router.Vars(r) volume := vars["volume"] path := vars["path"] writeCloser, err := stServer.storage.CreateFile(volume, path) if err != nil { httpErr := http.StatusInternalServerError if err == errVolumeNotFound { httpErr = http.StatusNotFound } else if err == errIsNotRegular { httpErr = http.StatusConflict } http.Error(w, err.Error(), httpErr) return } reader := r.Body if _, err = io.Copy(writeCloser, reader); err != nil { safeCloseAndRemove(writeCloser) http.Error(w, err.Error(), http.StatusInternalServerError) return } writeCloser.Close() reader.Close() }) // StreamDownloadHandler - stream download handler. storageRouter.Methods("GET").Path("/storage/download/{volume}/{path:.+}").Queries("offset", "{offset:.*}").HandlerFunc(func(w http.ResponseWriter, r *http.Request) { vars := router.Vars(r) volume := vars["volume"] path := vars["path"] offset, err := strconv.ParseInt(r.URL.Query().Get("offset"), 10, 64) if err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } readCloser, err := stServer.storage.ReadFile(volume, path, offset) if err != nil { httpErr := http.StatusBadRequest if err == errVolumeNotFound { httpErr = http.StatusNotFound } else if err == errFileNotFound { httpErr = http.StatusNotFound } http.Error(w, err.Error(), httpErr) return } // Copy reader to writer. io.Copy(w, readCloser) // Flush out any remaining buffers to client. w.(http.Flusher).Flush() // Close the reader. readCloser.Close() }) }