Как выдать диалог «сохранить как» в ZF2?

$type = 'text/xml';
$data = '...';
$fileName = 'data.xml';

$response = $this->getResponse();
$response->setContent($data);

$headers = new \Zend\Http\Headers();
$headers->addHeaderLine('Content-Type', $type)
        ->addHeaderLine('Content-Disposition', 'attachment; filename="' . $fileName . '"')
        ->addHeaderLine('Content-Length', strlen($data));

$response->setHeaders($headers);
return $response;

$response = new \Zend\Http\Response\Stream();
$response->setStream(fopen($fileName, 'r'));
$response->setStatusCode(200);