},
		Parts: []ObjectPartInfo{
			{
				Number:     1,
				Size:       297580380,
				ActualSize: 297435132,
			},
			{
				Number:     2,
				Size:       297580380,
				ActualSize: 297435132,
			},
		},
	}

	encOff, encLength, skipLen, seqNumber, partStart, err := objInfo.GetDecryptedRange(rs)
	if err != nil {

		forceMD5 = mustGetUUIDBytes()
	}

	hashReader, err := hash.NewReaderWithOpts(ctx, reader, hash.Options{
		Size:       size,
		MD5Hex:     md5hex,
		SHA256Hex:  sha256hex,
		ActualSize: actualSize,
		DisableMD5: false,
		ForceMD5:   forceMD5,
	})
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	// Set the actual size to the compressed/decrypted size if encrypted.
	actualSize, err := srcInfo.GetActualSize()
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	length := actualSize

	if !cpSrcDstSame {
		if err := enforceBucketQuotaHard(ctx, dstBucket, actualSize); err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}

	ETag       string            `json:"etag,omitempty" msg:"e"`
	Number     int               `json:"number" msg:"n"`
	Size       int64             `json:"size" msg:"s"`        // Size of the part on the disk.
	ActualSize int64             `json:"actualSize" msg:"as"` // Original size of the part without compression or encryption bytes.
	ModTime    time.Time         `json:"modTime" msg:"mt"`    // Date and time at which the part was uploaded.

			defer wg.Done()

			objInfos[idx] = ObjectInfo{Name: req.Key}

			hopts := hash.Options{
				Size:       int64(len(fanOutBuf)),
				MD5Hex:     opts.MD5Hex,
				SHA256Hex:  "",
				ActualSize: -1,
				DisableMD5: true,
			}
			hr, err := hash.NewReaderWithOpts(ctx, bytes.NewReader(fanOutBuf), hopts)
			if err != nil {
				errs[idx] = err
				return
			}

			reader := NewPutObjReader(hr)

				return
			}
		case "s":
			z.Size, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "Size")
				return
			}
		case "as":
			z.ActualSize, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "ActualSize")
				return
			}
		case "mt":
			z.ModTime, err = dc.ReadTime()
			if err != nil {
				err = msgp.WrapError(err, "ModTime")
				return
			}
		case "i":

		forceMD5 = mustGetUUIDBytes()
	}

	hashReader, err := hash.NewReaderWithOpts(ctx, reader, hash.Options{
		Size:       actualSize,
		MD5Hex:     clientETag.String(),
		SHA256Hex:  "",
		ActualSize: actualSize,
		DisableMD5: false,
		ForceMD5:   forceMD5,
	})
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

// AddObjectPart - add a new object part in order.
func (fi *FileInfo) AddObjectPart(partNumber int, partETag string, partSize, actualSize int64, modTime time.Time, idx []byte, checksums map[string]string) {
	partInfo := ObjectPartInfo{
		Number:     partNumber,
		ETag:       partETag,
		Size:       partSize,
		ActualSize: actualSize,
		ModTime:    modTime,
		Index:      idx,
		Checksums:  checksums,
	}

		modTime = UTCNow()
	}

	kind, encrypted := crypto.IsEncrypted(userDefined)
	actualSize := data.ActualSize()
	if actualSize < 0 {
		compressed := fi.IsCompressed()
		switch {
		case compressed:
			// ... nothing changes for compressed stream.
			// if actualSize is -1 we have no known way to
			// determine what is the actualSize.
		case encrypted:
			decSize, err := sio.DecryptedSize(uint64(n))

			xhttp.ContentType:                "application/json",
		},
		Parts: []ObjectPartInfo{
			{
				Number:     1,
				Size:       1234345,
				ActualSize: 1234345,
			},
			{
				Number:     2,
				Size:       1234345,
				ActualSize: 1234345,
			},
		},
		Erasure: ErasureInfo{
			Algorithm:    ReedSolomon.String(),
			DataBlocks:   4,
			ParityBlocks: 2,
			BlockSize:    10000,