Sulu\Bundle\MediaBundle\Controller\MediaRedirectController::redirectAction PHP Method

    public function redirectAction(Request $request, $id)
    {
        $locale = $this->getRequestParameter($request, 'locale', true);
        $format = $this->getRequestParameter($request, 'format');
        /** @var Media $media */
        $media = $this->container->get('sulu_media.media_manager')->getById($id, $locale);
        if (null === $format) {
            return $this->redirect($media->getUrl());
        }
        if (!array_key_exists($format, $media->getFormats())) {
            throw $this->createNotFoundException();
        }
        return $this->redirect($media->getFormats()[$format]);
    }