Download / Show Headers for Symfony2

response.php

$response = new Response();

$response->headers->set('Cache-Control', 'private');
$response->headers->set('Content-type', mime_content_type($image));
$response->headers->set('Content-length', filesize($image));
$response->headers->set('Content-Disposition', 'attachment; filename="' . basename($image) . '";');

$response->sendHeaders();
$response->setContent(readfile($image));

return $response;