/**
* Catches a form AJAX exception and build a response from it.
*
* @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
* The event to process.
*/
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);
}
}
}
/**
* @covers ::getFormAjaxException
*/
public function testOnExceptionNestedWrongException()
{
$nested_exception = new \Exception();
$exception = new \Exception('', 0, $nested_exception);
$request = new Request();
$this->formAjaxResponseBuilder->expects($this->never())->method('buildResponse');
$this->assertResponseFromException($request, $exception, NULL);
}
/**
* Processes an Ajax form submission.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request object.
*
* @return mixed
* Whatever is returned by the triggering element's #ajax['callback']
* function. One of:
* - A render array containing the new or updated content to return to the
* browser. This is commonly an element within the rebuilt form.
* - A \Drupal\Core\Ajax\AjaxResponse object containing commands for the
* browser to process.
*
* @throws \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface
*/
public function content(Request $request)
{
$ajax_form = $this->getForm($request);
$form = $ajax_form->getForm();
$form_state = $ajax_form->getFormState();
$commands = $ajax_form->getCommands();
$this->formBuilder->processForm($form['#form_id'], $form, $form_state);
return $this->formAjaxResponseBuilder->buildResponse($request, $form, $form_state, $commands);
}
