Mercurial > hg > isophonics-drupal-site
view core/lib/Drupal/Core/EventSubscriber/Fast404ExceptionHtmlSubscriber.php @ 12:7a779792577d
Update Drupal core to v8.4.5 (via Composer)
author | Chris Cannam |
---|---|
date | Fri, 23 Feb 2018 15:52:07 +0000 |
parents | 4c8ae668cc8c |
children | 129ea1e6d783 |
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<?php 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); } } } }