function DefaultExceptionHtmlSubscriber::makeSubrequest
Same name in other branches
- 9 core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php \Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber::makeSubrequest()
- 8.9.x core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php \Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber::makeSubrequest()
- 11.x core/lib/Drupal/Core/EventSubscriber/DefaultExceptionHtmlSubscriber.php \Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber::makeSubrequest()
Makes a subrequest to retrieve the default error page.
Parameters
\Symfony\Component\HttpKernel\Event\ExceptionEvent $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.
5 calls to DefaultExceptionHtmlSubscriber::makeSubrequest()
- CustomPageExceptionHtmlSubscriber::makeSubrequestToCustomPath in core/
lib/ Drupal/ Core/ EventSubscriber/ CustomPageExceptionHtmlSubscriber.php - Makes a subrequest to retrieve the custom error page.
- DefaultExceptionHtmlSubscriber::on401 in core/
lib/ Drupal/ Core/ EventSubscriber/ DefaultExceptionHtmlSubscriber.php - Handles a 401 error for HTML.
- DefaultExceptionHtmlSubscriber::on403 in core/
lib/ Drupal/ Core/ EventSubscriber/ DefaultExceptionHtmlSubscriber.php - Handles a 403 error for HTML.
- DefaultExceptionHtmlSubscriber::on404 in core/
lib/ Drupal/ Core/ EventSubscriber/ DefaultExceptionHtmlSubscriber.php - Handles a 404 error for HTML.
- DefaultExceptionHtmlSubscriber::on4xx in core/
lib/ Drupal/ Core/ EventSubscriber/ DefaultExceptionHtmlSubscriber.php - Handles a 4xx error for HTML.
File
-
core/
lib/ Drupal/ Core/ EventSubscriber/ DefaultExceptionHtmlSubscriber.php, line 145
Class
- DefaultExceptionHtmlSubscriber
- Exception subscriber for handling core default HTML error pages.
Namespace
Drupal\Core\EventSubscriberCode
protected function makeSubrequest(ExceptionEvent $event, $url, $status_code) {
$request = $event->getRequest();
$exception = $event->getThrowable();
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 the exception's cacheability metadata, if any. If the exception
// itself isn't cacheable, then this will make the response uncacheable:
// max-age=0 will be set.
if ($response instanceof CacheableResponseInterface) {
$response->addCacheableDependency($exception);
}
// 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'], Error::DEFAULT_ERROR_MESSAGE, $error);
}
}
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