// check file size
            responseData.setContentLength(file.getSize());
            checkMaxContentLength(responseData);

            if (file.getUser() != null) {
                responseData.addMetaData(FTP_FILE_USER, file.getUser());
            }
            if (file.getGroup() != null) {
                responseData.addMetaData(FTP_FILE_GROUP, file.getGroup());
            }