protected DefaultExceptionHtmlSubscriber::makeSubrequest(GetResponseForExceptionEvent $event, $url, $status_code)
Makes a subrequest to retrieve the default error page.
Parameters
\Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event: The event to process.
string $url: The path/url to which to make a subrequest for this error message.
int $status_code: The status code for the error being handled.
File
- core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php, line 122
Class
- DefaultExceptionHtmlSubscriber
- Exception subscriber for handling core default HTML error pages.
Namespace
Drupal\Core\EventSubscriber
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | protected function makeSubrequest(GetResponseForExceptionEvent $event, $url, $status_code) { $request = $event->getRequest(); $exception = $event->getException(); try { // Reuse the exact same request (so keep the same URL, keep the access // result, the exception, et cetera) but override the routing information. // This means that aside from routing, this is identical to the master // request. This allows us to generate a response that is executed on // behalf of the master request, i.e. for the original URL. This is what // allows us to e.g. generate a 404 response for the original URL; if we // would execute a subrequest with the 404 route's URL, then it'd be // generated for *that* URL, not the *original* URL. $sub_request = clone $request; // The routing to the 404 page should be done as GET request because it is // restricted to GET and POST requests only. Otherwise a DELETE request // would for example trigger a method not allowed exception. $request_context = clone($this->accessUnawareRouter->getContext()); $request_context->setMethod('GET'); $this->accessUnawareRouter->setContext($request_context); $sub_request->attributes->add($this->accessUnawareRouter->match($url)); // Add to query (GET) or request (POST) parameters: // - 'destination' (to ensure e.g. the login form in a 403 response // redirects to the original URL) // - '_exception_statuscode' $parameters = $sub_request->isMethod('GET') ? $sub_request->query : $sub_request->request; $parameters->add($this->redirectDestination->getAsArray() + ['_exception_statuscode' => $status_code]); $response = $this->httpKernel->handle($sub_request, HttpKernelInterface::SUB_REQUEST); // Only 2xx responses should have their status code overridden; any // other status code should be passed on: redirects (3xx), error (5xx)… // @see https://www.drupal.org/node/2603788#comment-10504916 if ($response->isSuccessful()) { $response->setStatusCode($status_code); } // Persist any special HTTP headers that were set on the exception. if ($exception instanceof HttpExceptionInterface) { $response->headers->add($exception->getHeaders()); } $event->setResponse($response); } catch (\Exception $e) { // If an error happened in the subrequest we can't do much else. Instead, // just log it. The DefaultExceptionSubscriber will catch the original // exception and handle it normally. $error = Error::decodeException($e); $this->logger->log($error['severity_level'], '%type: @message in %function (line %line of %file).', $error); }} |
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