Mercurial > hg > isophonics-drupal-site
view core/lib/Drupal/Core/EventSubscriber/CustomPageExceptionHtmlSubscriber.php @ 0:4c8ae668cc8c
Initial import (non-working)
author | Chris Cannam |
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date | Wed, 29 Nov 2017 16:09:58 +0000 |
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<?php namespace Drupal\Core\EventSubscriber; use Drupal\Core\Access\AccessManagerInterface; use Drupal\Core\Cache\RefinableCacheableDependencyInterface; use Drupal\Core\Config\ConfigFactoryInterface; use Drupal\Core\Routing\AccessAwareRouterInterface; use Drupal\Core\Routing\RedirectDestinationInterface; use Drupal\Core\Url; use Psr\Log\LoggerInterface; use Symfony\Component\HttpFoundation\Response; use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent; use Symfony\Component\HttpKernel\HttpKernelInterface; use Symfony\Component\Routing\Matcher\UrlMatcherInterface; /** * Exception subscriber for handling core custom HTML error pages. */ class CustomPageExceptionHtmlSubscriber extends DefaultExceptionHtmlSubscriber { /** * The configuration factory. * * @var \Drupal\Core\Config\ConfigFactoryInterface */ protected $configFactory; /** * The access manager. * * @var \Drupal\Core\Access\AccessManagerInterface */ protected $accessManager; /** * Constructs a new CustomPageExceptionHtmlSubscriber. * * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory * The configuration factory. * @param \Symfony\Component\HttpKernel\HttpKernelInterface $http_kernel * The HTTP Kernel service. * @param \Psr\Log\LoggerInterface $logger * The logger service. * @param \Drupal\Core\Routing\RedirectDestinationInterface $redirect_destination * The redirect destination service. * @param \Symfony\Component\Routing\Matcher\UrlMatcherInterface $access_unaware_router * A router implementation which does not check access. * @param \Drupal\Core\Access\AccessManagerInterface $access_manager * The access manager. */ public function __construct(ConfigFactoryInterface $config_factory, HttpKernelInterface $http_kernel, LoggerInterface $logger, RedirectDestinationInterface $redirect_destination, UrlMatcherInterface $access_unaware_router, AccessManagerInterface $access_manager) { parent::__construct($http_kernel, $logger, $redirect_destination, $access_unaware_router); $this->configFactory = $config_factory; $this->accessManager = $access_manager; } /** * {@inheritdoc} */ protected static function getPriority() { return -50; } /** * {@inheritdoc} */ public function on403(GetResponseForExceptionEvent $event) { $custom_403_path = $this->configFactory->get('system.site')->get('page.403'); if (!empty($custom_403_path)) { $this->makeSubrequestToCustomPath($event, $custom_403_path, Response::HTTP_FORBIDDEN); } } /** * {@inheritdoc} */ public function on404(GetResponseForExceptionEvent $event) { $custom_404_path = $this->configFactory->get('system.site')->get('page.404'); if (!empty($custom_404_path)) { $this->makeSubrequestToCustomPath($event, $custom_404_path, Response::HTTP_NOT_FOUND); } } /** * Makes a subrequest to retrieve the custom error page. * * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event * The event to process. * @param string $custom_path * The custom path to which to make a subrequest for this error message. * @param int $status_code * The status code for the error being handled. */ protected function makeSubrequestToCustomPath(GetResponseForExceptionEvent $event, $custom_path, $status_code) { $url = Url::fromUserInput($custom_path); if ($url->isRouted()) { $access_result = $this->accessManager->checkNamedRoute($url->getRouteName(), $url->getRouteParameters(), NULL, TRUE); $request = $event->getRequest(); // Merge the custom path's route's access result's cacheability metadata // with the existing one (from the master request), otherwise create it. if (!$request->attributes->has(AccessAwareRouterInterface::ACCESS_RESULT)) { $request->attributes->set(AccessAwareRouterInterface::ACCESS_RESULT, $access_result); } else { $existing_access_result = $request->attributes->get(AccessAwareRouterInterface::ACCESS_RESULT); if ($existing_access_result instanceof RefinableCacheableDependencyInterface) { $existing_access_result->addCacheableDependency($access_result); } } // Only perform the subrequest if the custom path is actually accessible. if (!$access_result->isAllowed()) { return; } } $this->makeSubrequest($event, $custom_path, $status_code); } }