package gcssink import ( "context" "fmt" "log" "os" "cloud.google.com/go/storage" "github.com/chrislusf/seaweedfs/weed/filer2" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/replication/sink" "github.com/chrislusf/seaweedfs/weed/replication/source" "github.com/chrislusf/seaweedfs/weed/util" "google.golang.org/api/option" ) type GcsSink struct { client *storage.Client bucket string dir string filerSource *source.FilerSource } func init() { sink.Sinks = append(sink.Sinks, &GcsSink{}) } func (g *GcsSink) GetName() string { return "google_cloud_storage" } func (g *GcsSink) GetSinkToDirectory() string { return g.dir } func (g *GcsSink) Initialize(configuration util.Configuration) error { return g.initialize( configuration.GetString("google_application_credentials"), configuration.GetString("bucket"), configuration.GetString("directory"), ) } func (g *GcsSink) SetSourceFiler(s *source.FilerSource) { g.filerSource = s } func (g *GcsSink) initialize(google_application_credentials, bucketName, dir string) error { g.bucket = bucketName g.dir = dir ctx := context.Background() // Creates a client. if google_application_credentials == "" { var found bool google_application_credentials, found = os.LookupEnv("GOOGLE_APPLICATION_CREDENTIALS") if !found { log.Fatalf("need to specific GOOGLE_APPLICATION_CREDENTIALS env variable or google_application_credentials in replication.toml") } } client, err := storage.NewClient(ctx, option.WithCredentialsFile(google_application_credentials)) if err != nil { log.Fatalf("Failed to create client: %v", err) } g.client = client return nil } func (g *GcsSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error { if isDirectory { key = key + "/" } if err := g.client.Bucket(g.bucket).Object(key).Delete(context.Background()); err != nil { return fmt.Errorf("gcs delete %s%s: %v", g.bucket, key, err) } return nil } func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry) error { if entry.IsDirectory { return nil } totalSize := filer2.TotalSize(entry.Chunks) chunkViews := filer2.ViewFromChunks(entry.Chunks, 0, int(totalSize)) ctx := context.Background() wc := g.client.Bucket(g.bucket).Object(key).NewWriter(ctx) for _, chunk := range chunkViews { fileUrl, err := g.filerSource.LookupFileId(chunk.FileId) if err != nil { return err } _, err = util.ReadUrlAsStream(fileUrl, chunk.Offset, int(chunk.Size), func(data []byte) { wc.Write(data) }) if err != nil { return err } } if err := wc.Close(); err != nil { return err } return nil } func (g *GcsSink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) { // TODO improve efficiency return false, nil }