/**
  * Make the response.
  *
  * @param FileInterface $file
  * @return Response
  */
 public function make(FileInterface $file)
 {
     // Start the response.
     $response = $this->response->make();
     $response->headers->set('Pragma', 'public');
     $response->headers->set('Etag', $file->hash());
     $response->headers->set('Content-Length', $file->getSize());
     $response->headers->set('Content-Type', $file->getMimetype());
     $response->headers->set('Cache-Control', 'public,max-age=300,s-maxage=900');
     // Should be configurable
     $response->headers->set('Last-Modified', $file->lastModified()->setTimezone('GMT')->format('D, d M Y H:i:s'));
     return $response;
 }