* @see FTPCallback#onDownloadStart
*/
@Override
public FtpletResult onDownloadStart(FtpSession session, FtpRequest request)
throws FtpException, IOException {
UserDetails user = user(session.getUser());
File workingDir = workingDir(session);
String fileName = request.getArgument();
return toFtpResult(callback.onDownloadStart(user, workingDir, fileName));
}