Symfony2：在浏览器中打开PDF文件

In my Symfony 2 project, I would like to display a pdf in the browser when the user clicks on a link for viewing a pdf file. The pdf files are contained in my "views" folder, in a subfolder called "pdf-files".

How do I need to adapt the following controller function so that a pdf file gets displayed in the browser?

/**
 * @Route("/pdf/{pdfFilename}")
*/
public function pdfAction($pdfFilename) {
   return $this->render('@App/pdf-files/'.$pdfFilename);
}

It's all about conten-type header of http request. So just set it:

$response = $this->render('@App/pdf-files/'.$pdfFilename);
$response->headers->set('Content-Type', 'application/pdf');

return $response;

To serve static file you might want to use BinaryFileResponse class. In such response you can set content disposition - is this file should be opened in a browser or downloaded as an attachment.

So your code should look something like:

public function pdfAction($pdfFilename)
{
   $kernel = $this->get('kernel');
   $path = $kernel->locateResource('@AppBundle/Resources/pdf-files/'.$pdfFilename);

   $response = new BinaryFileResponse($path)

   $response->headers->set('Content-Type', 'application/pdf');
   $response->setContentDisposition(
      ResponseHeaderBag::DISPOSITION_INLINE, //use ResponseHeaderBag::DISPOSITION_ATTACHMENT to save as an attachement
      $pdfFilename
   );

   return $response;
}

EDIT: since locateResource is looking for files under Resources directory by default I would suggest moving your pdf-files directory from views directory to Resources