package filer import ( "context" "fmt" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/pb/remote_pb" "github.com/chrislusf/seaweedfs/weed/util" ) func (entry *Entry) IsInRemoteOnly() bool { return len(entry.Chunks) == 0 && entry.Remote != nil && entry.Remote.RemoteSize > 0 } func (f *Filer) ReadRemote(entry *Entry, offset int64, size int64) (data []byte, err error) { client, _, found := f.RemoteStorage.GetRemoteStorageClient(entry.Remote.StorageName) if !found { return nil, fmt.Errorf("remote storage %v not found", entry.Remote.StorageName) } mountDir, remoteLoation := f.RemoteStorage.FindMountDirectory(entry.FullPath) sourceLoc := MapFullPathToRemoteStorageLocation(mountDir, remoteLoation, entry.FullPath) return client.ReadFile(sourceLoc, offset, size) } func MapFullPathToRemoteStorageLocation(localMountedDir util.FullPath, remoteMountedLocation *remote_pb.RemoteStorageLocation, fp util.FullPath) *remote_pb.RemoteStorageLocation { remoteLocation := &remote_pb.RemoteStorageLocation{ Name: remoteMountedLocation.Name, Bucket: remoteMountedLocation.Bucket, Path: remoteMountedLocation.Path, } remoteLocation.Path = string(util.FullPath(remoteLocation.Path).Child(string(fp)[len(localMountedDir):])) return remoteLocation } func MapRemoteStorageLocationPathToFullPath(localMountedDir util.FullPath, remoteMountedLocation *remote_pb.RemoteStorageLocation, remoteLocationPath string)(fp util.FullPath) { return localMountedDir.Child(remoteLocationPath[len(remoteMountedLocation.Path):]) } func DownloadToLocal(filerClient filer_pb.FilerClient, remoteConf *remote_pb.RemoteConf, remoteLocation *remote_pb.RemoteStorageLocation, parent util.FullPath, entry *filer_pb.Entry) error { return filerClient.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error { _, err := client.DownloadToLocal(context.Background(), &filer_pb.DownloadToLocalRequest{ Directory: string(parent), Name: entry.Name, }) return err }) }