public function FormAjaxSubscriber::onException in Zircon Profile 8
Same name and namespace in other branches
- 8.0 core/lib/Drupal/Core/Form/EventSubscriber/FormAjaxSubscriber.php \Drupal\Core\Form\EventSubscriber\FormAjaxSubscriber::onException()
Catches a form AJAX exception and build a response from it.
Parameters
\Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event: The event to process.
File
- core/
lib/ Drupal/ Core/ Form/ EventSubscriber/ FormAjaxSubscriber.php, line 76 - Contains \Drupal\Core\Form\EventSubscriber\FormAjaxSubscriber.
Class
- FormAjaxSubscriber
- Wraps AJAX form submissions that are triggered via an exception.
Namespace
Drupal\Core\Form\EventSubscriberCode
public function onException(GetResponseForExceptionEvent $event) {
$exception = $event
->getException();
$request = $event
->getRequest();
// Render a nice error message in case we have a file upload which exceeds
// the configured upload limit.
if ($exception instanceof BrokenPostRequestException && $request->query
->has(FormBuilderInterface::AJAX_FORM_REQUEST)) {
$this
->drupalSetMessage($this
->t('An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (@size) that this server supports.', [
'@size' => $this
->formatSize($exception
->getSize()),
]), 'error');
$response = new AjaxResponse();
$status_messages = [
'#type' => 'status_messages',
];
$response
->addCommand(new ReplaceCommand(NULL, $status_messages));
$response->headers
->set('X-Status-Code', 200);
$event
->setResponse($response);
return;
}
// Extract the form AJAX exception (it may have been passed to another
// exception before reaching here).
if ($exception = $this
->getFormAjaxException($exception)) {
$request = $event
->getRequest();
$form = $exception
->getForm();
$form_state = $exception
->getFormState();
// Set the build ID from the request as the old build ID on the form.
$form['#build_id_old'] = $request
->get('form_build_id');
try {
$response = $this->formAjaxResponseBuilder
->buildResponse($request, $form, $form_state, []);
// Since this response is being set in place of an exception, explicitly
// mark this as a 200 status.
$response->headers
->set('X-Status-Code', 200);
$event
->setResponse($response);
} catch (\Exception $e) {
// Otherwise, replace the existing exception with the new one.
$event
->setException($e);
}
}
}