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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); | |
} | |
} | |
} | |
} |