package s3_backend import ( "fmt" "io" "os" "strings" "time" "github.com/aws/aws-sdk-go/service/s3" "github.com/aws/aws-sdk-go/service/s3/s3iface" "github.com/google/uuid" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb" "github.com/chrislusf/seaweedfs/weed/storage/backend" ) func init() { backend.BackendStorageFactories["s3"] = &S3BackendFactory{} } type S3BackendFactory struct { } func (factory *S3BackendFactory) StorageType() backend.StorageType { return backend.StorageType("s3") } func (factory *S3BackendFactory) BuildStorage(configuration backend.StringProperties, id string) (backend.BackendStorage, error) { return newS3BackendStorage(configuration, id) } type S3BackendStorage struct { id string aws_access_key_id string aws_secret_access_key string region string bucket string conn s3iface.S3API } func newS3BackendStorage(configuration backend.StringProperties, id string) (s *S3BackendStorage, err error) { s = &S3BackendStorage{} s.id = id s.aws_access_key_id = configuration.GetString("aws_access_key_id") s.aws_secret_access_key = configuration.GetString("aws_secret_access_key") s.region = configuration.GetString("region") s.bucket = configuration.GetString("bucket") s.conn, err = createSession(s.aws_access_key_id, s.aws_secret_access_key, s.region) glog.V(0).Infof("created backend storage s3.%s for region %s bucket %s", s.id, s.region, s.bucket) return } func (s *S3BackendStorage) ToProperties() map[string]string { m := make(map[string]string) m["aws_access_key_id"] = s.aws_access_key_id m["aws_secret_access_key"] = s.aws_secret_access_key m["region"] = s.region m["bucket"] = s.bucket return m } func (s *S3BackendStorage) NewStorageFile(key string, tierInfo *volume_server_pb.VolumeTierInfo) backend.BackendStorageFile { if strings.HasPrefix(key, "/") { key = key[1:] } f := &S3BackendStorageFile{ backendStorage: s, key: key, tierInfo: tierInfo, } return f } func (s *S3BackendStorage) CopyFile(f *os.File, fn func(progressed int64, percentage float32) error) (key string, size int64, err error) { randomUuid, _ := uuid.NewRandom() key = randomUuid.String() glog.V(1).Infof("copying dat file of %s to remote s3.%s as %s", f.Name(), s.id, key) size, err = uploadToS3(s.conn, f.Name(), s.bucket, key, fn) return } func (s *S3BackendStorage) DownloadFile(fileName string, key string, fn func(progressed int64, percentage float32) error) (size int64, err error) { glog.V(1).Infof("download dat file of %s from remote s3.%s as %s", fileName, s.id, key) size, err = downloadFromS3(s.conn, fileName, s.bucket, key, fn) return } func (s *S3BackendStorage) DeleteFile(key string) (err error) { glog.V(1).Infof("delete dat file %s from remote", key) err = deleteFromS3(s.conn, s.bucket, key) return } type S3BackendStorageFile struct { backendStorage *S3BackendStorage key string tierInfo *volume_server_pb.VolumeTierInfo } func (s3backendStorageFile S3BackendStorageFile) ReadAt(p []byte, off int64) (n int, err error) { bytesRange := fmt.Sprintf("bytes=%d-%d", off, off+int64(len(p))-1) // glog.V(0).Infof("read %s %s", s3backendStorageFile.key, bytesRange) getObjectOutput, getObjectErr := s3backendStorageFile.backendStorage.conn.GetObject(&s3.GetObjectInput{ Bucket: &s3backendStorageFile.backendStorage.bucket, Key: &s3backendStorageFile.key, Range: &bytesRange, }) if getObjectErr != nil { return 0, fmt.Errorf("bucket %s GetObject %s: %v", s3backendStorageFile.backendStorage.bucket, s3backendStorageFile.key, getObjectErr) } defer getObjectOutput.Body.Close() glog.V(4).Infof("read %s %s", s3backendStorageFile.key, bytesRange) glog.V(4).Infof("content range: %s, contentLength: %d", *getObjectOutput.ContentRange, *getObjectOutput.ContentLength) for { if n, err = getObjectOutput.Body.Read(p); err == nil && n < len(p) { p = p[n:] } else { break } } if err == io.EOF { err = nil } return } func (s3backendStorageFile S3BackendStorageFile) WriteAt(p []byte, off int64) (n int, err error) { panic("not implemented") } func (s3backendStorageFile S3BackendStorageFile) Truncate(off int64) error { panic("not implemented") } func (s3backendStorageFile S3BackendStorageFile) Close() error { return nil } func (s3backendStorageFile S3BackendStorageFile) GetStat() (datSize int64, modTime time.Time, err error) { files := s3backendStorageFile.tierInfo.GetFiles() if len(files) == 0 { err = fmt.Errorf("remote file info not found") return } datSize = int64(files[0].FileSize) modTime = time.Unix(int64(files[0].ModifiedTime), 0) return } func (s3backendStorageFile S3BackendStorageFile) Name() string { return s3backendStorageFile.key }