package remote_storage import ( "fmt" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "io" "strings" "sync" ) func ParseLocation(remote string) (loc *filer_pb.RemoteStorageLocation) { loc = &filer_pb.RemoteStorageLocation{} if strings.HasSuffix(string(remote), "/") { remote = remote[:len(remote)-1] } parts := strings.SplitN(string(remote), "/", 3) if len(parts) >= 1 { loc.Name = parts[0] } if len(parts) >= 2 { loc.Bucket = parts[1] } loc.Path = string(remote[len(loc.Name)+1+len(loc.Bucket):]) if loc.Path == "" { loc.Path = "/" } return } func FormatLocation(loc *filer_pb.RemoteStorageLocation) string { return fmt.Sprintf("%s/%s%s", loc.Name, loc.Bucket, loc.Path) } type VisitFunc func(dir string, name string, isDirectory bool, remoteEntry *filer_pb.RemoteEntry) error type RemoteStorageClient interface { Traverse(loc *filer_pb.RemoteStorageLocation, visitFn VisitFunc) error ReadFile(loc *filer_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error) WriteDirectory(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error) WriteFile(loc *filer_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (remoteEntry *filer_pb.RemoteEntry, err error) UpdateFileMetadata(loc *filer_pb.RemoteStorageLocation, oldEntry *filer_pb.Entry, newEntry *filer_pb.Entry) (err error) DeleteFile(loc *filer_pb.RemoteStorageLocation) (err error) } type RemoteStorageClientMaker interface { Make(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error) } var ( RemoteStorageClientMakers = make(map[string]RemoteStorageClientMaker) remoteStorageClients = make(map[string]RemoteStorageClient) remoteStorageClientsLock sync.Mutex ) func makeRemoteStorageClient(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error) { maker, found := RemoteStorageClientMakers[remoteConf.Type] if !found { return nil, fmt.Errorf("remote storage type %s not found", remoteConf.Type) } return maker.Make(remoteConf) } func GetRemoteStorage(remoteConf *filer_pb.RemoteConf) (RemoteStorageClient, error) { remoteStorageClientsLock.Lock() defer remoteStorageClientsLock.Unlock() existingRemoteStorageClient, found := remoteStorageClients[remoteConf.Name] if found { return existingRemoteStorageClient, nil } newRemoteStorageClient, err := makeRemoteStorageClient(remoteConf) if err != nil { return nil, fmt.Errorf("make remote storage client %s: %v", remoteConf.Name, err) } remoteStorageClients[remoteConf.Name] = newRemoteStorageClient return newRemoteStorageClient, nil }