UserTags string

	// List of individual parts, maximum size of upto 10,000
	Parts []ObjectPartInfo `json:"-"`

	// Implements writer and reader used by CopyObject API
	Writer       io.WriteCloser `json:"-" msg:"-"`
	Reader       *hash.Reader   `json:"-" msg:"-"`
	PutObjReader *PutObjReader  `json:"-" msg:"-"`

	metadataOnly bool
	versionOnly  bool // adds a new version, only used by CopyObject

	}
	closeReader := func() { obj.Close() }
	reader, err := fn(obj, h, closeReader)
	if err != nil {
		return nil, proxy, err
	}
	reader.ObjInfo = oi.Clone()
	if rs != nil {
		contentSize, err := parseSizeFromContentRange(h)
		if err != nil {
			return nil, proxy, err
		}
		reader.ObjInfo.Size = contentSize
	}

	return reader, proxyResult{Proxy: true}, nil
}

	startOffset int64
	length      int64
}

// WarmBackend provides interface to be implemented by remote tier backends
type WarmBackend interface {
	Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error)
	Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error)
	Remove(ctx context.Context, object string, rv remoteVersionID) error

	stsErr := stsErrCodes.ToSTSErr(errCode)

	// Generate error response.
	stsErrorResponse := STSErrorResponse{}
	stsErrorResponse.Error.Code = stsErr.Code
	stsErrorResponse.RequestID = w.Header().Get(xhttp.AmzRequestID)
	stsErrorResponse.Error.Message = stsErr.Description
	if err != nil {
		stsErrorResponse.Error.Message = err.Error()
	}
	switch errCode {
	case ErrSTSInternalError, ErrSTSUpstreamError:

		if c.dialer != nil {
			dialer.NetDial = c.dialer.DialContext
		}
		if c.header == nil {
			c.header = make(http.Header, 2)
		}
		c.header.Set("Authorization", "Bearer "+c.auth(""))
		c.header.Set("X-Minio-Time", time.Now().UTC().Format(time.RFC3339))

		if len(c.header) > 0 {
			dialer.Header = ws.HandshakeHeaderHTTP(c.header)
		}
		dialer.TLSConfig = c.tlsConfig
		dialStarted := time.Now()
		if debugPrint {

func (config *TierConfigMgr) Bytes() ([]byte, error) {
	config.RLock()
	defer config.RUnlock()
	data := make([]byte, 4, config.Msgsize()+4)

	// Initialize the header.
	binary.LittleEndian.PutUint16(data[0:2], tierConfigFormat)
	binary.LittleEndian.PutUint16(data[2:4], tierConfigVersion)

	// Marshal the tier config
	return config.MarshalMsg(data)
}

	if w.f != nil {
		if err := w.closeCurrentFile(); err != nil {
			return err
		}
	}

	return nil
}

var stdErrEnc = json.NewEncoder(os.Stderr)

func (w *Writer) listen() {
	for {
		var r io.Reader = w.pr
		if w.opts.MaximumFileSize > 0 {
			r = io.LimitReader(w.pr, w.opts.MaximumFileSize)
		}
		if _, err := io.Copy(w.f, r); err != nil {
			msg := fmt.Sprintf("unable to write to log file %v: %v", w.f.Name(), err)

		}
		return err
	}
	if len(data) == 0 {
		// Seems to be empty create a new poolMeta object.
		return nil
	}
	if len(data) <= 4 {
		return fmt.Errorf("poolMeta: no data")
	}
	// Read header
	switch binary.LittleEndian.Uint16(data[0:2]) {
	case poolMetaFormat:
	default:
		return fmt.Errorf("poolMeta: unknown format: %d", binary.LittleEndian.Uint16(data[0:2]))
	}

			},
			shouldFail: false,
		},
		// Fail if header key is not in canonicalized form
		{
			header: http.Header{
				"x-amz-meta-appid": []string{"amz-meta"},
			},
			metadata: map[string]string{
				"x-amz-meta-appid": "amz-meta",
			},
			shouldFail: false,
		},
		// Support multiple values
		{
			header: http.Header{
				"x-amz-meta-key": []string{"amz-meta1", "amz-meta2"},
			},

	}

	// "x-amz-content-sha256" header value from the extracted result.
	extractedContentSha256 := extractedSignedHeaders.Get("x-amz-content-sha256")
	// "host" header value from the extracted result.
	extractedHost := extractedSignedHeaders.Get("host")
	//  "x-amz-date" header from the extracted result.
	extractedDate := extractedSignedHeaders.Get("x-amz-date")
	// extracted `expect` header.