vendor/symfony/http-kernel/EventListener/ResponseListener.php line 39

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  1. <?php
  3. /*
  4. * This file is part of the Symfony package.
  5. *
  6. * (c) Fabien Potencier <[email protected]>
  7. *
  8. * For the full copyright and license information, please view the LICENSE
  9. * file that was distributed with this source code.
  10. */
  12. namespace Symfony\Component\HttpKernel\EventListener;
  14. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  15. use Symfony\Component\HttpKernel\Event\ResponseEvent;
  16. use Symfony\Component\HttpKernel\KernelEvents;
  18. /**
  19. * ResponseListener fixes the Response headers based on the Request.
  20. *
  21. * @author Fabien Potencier <[email protected]>
  22. *
  23. * @final
  24. */
  25. class ResponseListener implements EventSubscriberInterface
  26. {
  27. private $charset;
  28. private $addContentLanguageHeader;
  30. public function __construct(string $charset, bool $addContentLanguageHeader = false)
  31. {
  32. $this->charset = $charset;
  33. $this->addContentLanguageHeader = $addContentLanguageHeader;
  34. }
  36. /**
  37. * Filters the Response.
  38. */
  39. public function onKernelResponse(ResponseEvent $event)
  40. {
  41. if (!$event->isMainRequest()) {
  42. return;
  43. }
  45. $response = $event->getResponse();
  47. if (null === $response->getCharset()) {
  48. $response->setCharset($this->charset);
  49. }
  51. if ($this->addContentLanguageHeader && !$response->isInformational() && !$response->isEmpty() && !$response->headers->has('Content-Language')) {
  52. $response->headers->set('Content-Language', $event->getRequest()->getLocale());
  53. }
  55. if ($event->getRequest()->attributes->get('_vary_by_language')) {
  56. $response->setVary('Accept-Language', false);
  57. }
  59. $response->prepare($event->getRequest());
  60. }
  62. public static function getSubscribedEvents(): array
  63. {
  64. return [
  65. KernelEvents::RESPONSE => 'onKernelResponse',
  66. ];
  67. }
  68. }