[symfony] how to provide static file dowload

$filename = 'symfony-1.4.20.tgz';

        $file = $this->container->getParameter('kernel.root_dir') . '/../web/data/' . $filename;

        $response = new BinaryFileResponse($file);

        $response->trustXSendfileTypeHeader();

        $response->setContentDisposition(

            ResponseHeaderBag::DISPOSITION_INLINE,

            $filename,

            iconv('UTF-8', 'ASCII//TRANSLIT', $filename)

        );

        return $response;