## Content-Type

	clnt, err := driver.getMinIOClient(ctx)
	if err != nil {
		return 0, err
	}

	info, err := clnt.PutObject(context.Background(), bucket, object, data, -1, minio.PutObjectOptions{
		ContentType:          mimedb.TypeByExtension(path.Ext(object)),
		DisableContentSha256: true,
	})
	return info.Size, err

		w:      pw,
		r:      pr,
		wg:     &sync.WaitGroup{},
	}
	wa.wg.Add(1)
	go func() {
		_, err := clnt.PutObject(r.Context(), bucket, object, pr, -1, minio.PutObjectOptions{
			ContentType:          mimedb.TypeByExtension(path.Ext(object)),
			DisableContentSha256: true,
		})
		pr.CloseWithError(err)
		wa.wg.Done()
	}()
	return wa, nil
}

func (f *sftpDriver) Filecmd(r *sftp.Request) (err error) {

	}

	// New object info
	fileObjInfo := ObjectInfo{
		Bucket:      bucket,
		Name:        object,
		Size:        int64(file.UncompressedSize64),
		ModTime:     zipObjInfo.ModTime,
		ContentType: mime.TypeByExtension(filepath.Ext(object)),
	}

	var rc io.ReadCloser

	if file.UncompressedSize64 > 0 {
		// There may be number of header bytes before the content.

	for index := range partsMetadata {
		partsMetadata[index] = fi
	}

	// Guess content-type from the extension if possible.
	if userDefined["content-type"] == "" {
		userDefined["content-type"] = mimedb.TypeByExtension(path.Ext(object))
	}

	// if storageClass is standard no need to save it as part of metadata.
	if userDefined[xhttp.AmzStorageClass] == storageclass.STANDARD {
		delete(userDefined, xhttp.AmzStorageClass)
	}

			userDefined["etag"] = opts.PreserveETag
		}
	}

	// Guess content-type from the extension if possible.
	if userDefined["content-type"] == "" {
		userDefined["content-type"] = mimedb.TypeByExtension(path.Ext(object))
	}

	// if storageClass is standard no need to save it as part of metadata.
	if userDefined[xhttp.AmzStorageClass] == storageclass.STANDARD {
		delete(userDefined, xhttp.AmzStorageClass)

pkg mime, func AddExtensionType(string, string) error
pkg mime, func FormatMediaType(string, map[string]string) string
pkg mime, func ParseMediaType(string) (string, map[string]string, error)
pkg mime, func TypeByExtension(string) string
pkg mime/multipart, func NewReader(io.Reader, string) *Reader
pkg mime/multipart, func NewWriter(io.Writer) *Writer
pkg mime/multipart, method (*FileHeader) Open() (File, error)