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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\EventSubscriber\Fast404ExceptionHtmlSubscriber. | |
| */ | |
| namespace Drupal\Core\EventSubscriber; | |
| use Drupal\Core\Config\ConfigFactoryInterface; | |
| use Drupal\Component\Utility\Html; | |
| use Symfony\Component\HttpFoundation\Response; | |
| use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent; | |
| use Symfony\Component\HttpKernel\HttpKernelInterface; | |
| /** | |
| * High-performance 404 exception subscriber. | |
| * | |
| * This subscriber will return a minimalist 404 response for HTML requests | |
| * without running a full page theming operation. | |
| */ | |
| class Fast404ExceptionHtmlSubscriber extends HttpExceptionSubscriberBase { | |
| /** | |
| * The HTTP kernel. | |
| * | |
| * @var \Symfony\Component\HttpKernel\HttpKernelInterface | |
| */ | |
| protected $httpKernel; | |
| /** | |
| * The config factory. | |
| * | |
| * @var \Drupal\Core\Config\ConfigFactoryInterface | |
| */ | |
| protected $configFactory; | |
| /** | |
| * Constructs a new Fast404ExceptionHtmlSubscriber. | |
| * | |
| * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory | |
| * The configuration factory. | |
| * @param \Symfony\Component\HttpKernel\HttpKernelInterface $http_kernel | |
| * The HTTP Kernel service. | |
| */ | |
| public function __construct(ConfigFactoryInterface $config_factory, HttpKernelInterface $http_kernel) { | |
| $this->configFactory = $config_factory; | |
| $this->httpKernel = $http_kernel; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| protected static function getPriority() { | |
| // A very high priority so that it can take precedent over anything else, | |
| // and thus be fast. | |
| return 200; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| protected function getHandledFormats() { | |
| return ['html']; | |
| } | |
| /** | |
| * Handles a 404 error for HTML. | |
| * | |
| * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event | |
| * The event to process. | |
| */ | |
| public function on404(GetResponseForExceptionEvent $event) { | |
| $request = $event->getRequest(); | |
| $config = $this->configFactory->get('system.performance'); | |
| $exclude_paths = $config->get('fast_404.exclude_paths'); | |
| if ($config->get('fast_404.enabled') && $exclude_paths && !preg_match($exclude_paths, $request->getPathInfo())) { | |
| $fast_paths = $config->get('fast_404.paths'); | |
| if ($fast_paths && preg_match($fast_paths, $request->getPathInfo())) { | |
| $fast_404_html = strtr($config->get('fast_404.html'), ['@path' => Html::escape($request->getUri())]); | |
| $response = new Response($fast_404_html, Response::HTTP_NOT_FOUND); | |
| $event->setResponse($response); | |
| } | |
| } | |
| } | |
| } |