/**
* Renders an HtmlPage object to a Response.
*
* @param \Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent $event
* The Event to process.
*/
public function onHtmlPage(GetResponseForControllerResultEvent $event)
{
$page = $event->getControllerResult();
if ($page instanceof HtmlPage) {
// In case renderPage() returns NULL due to an error cast it to a string
// so as to not cause issues with Response. This also allows renderPage
// to return an object implementing __toString(), but that is not
// recommended.
$response = new Response((string) $this->pageRenderer->render($page), $page->getStatusCode());
if ($tags = $page->getCacheTags()) {
$response->headers->set('X-Drupal-Cache-Tags', static::convertCacheTagsToHeader($tags));
}
if ($keys = $page->getCacheKeys()) {
$response->headers->set('cache_keys', serialize($keys));
}
if ($bin = $page->getCacheBin()) {
$response->headers->set('cache_bin', $bin);
}
if ($max_age = $page->getCacheMaxAge()) {
$response->headers->set('cache_max_age', $max_age);
}
// Set the generator in the HTTP header.
list($version) = explode('.', \Drupal::VERSION, 2);
$response->headers->set('X-Generator', 'Drupal ' . $version . ' (http://drupal.org)');
$event->setResponse($response);
}
}
/**
* @param $title
* The page title of the response.
* @param $body
* The body of the error page.
* @param $response_code
* The HTTP response code of the response.
* @return Response
* An error Response object ready to return to the browser.
*/
protected function createResponse($title, $body, $response_code)
{
$fragment = new HtmlFragment($body);
$fragment->setTitle($title);
$page = $this->fragmentRenderer->render($fragment, $response_code);
return new Response($this->htmlPageRenderer->render($page), $page->getStatusCode());
}
/**
* Processes a NotFound exception into an HTTP 404 response.
*
* @param \Symfony\Component\Debug\Exception\FlattenException $exception
* The flattened exception.
* @param \Symfony\Component\HttpFoundation\Request $request
* The request object that triggered this exception.
*
* @return \Symfony\Component\HttpFoundation\Response
* A response object.
*/
public function on404Html(FlattenException $exception, Request $request)
{
watchdog('page not found', String::checkPlain($request->attributes->get('_system_path')), array(), WATCHDOG_WARNING);
// Check for and return a fast 404 page if configured.
$config = \Drupal::config('system.performance');
$exclude_paths = $config->get('fast_404.exclude_paths');
if ($config->get('fast_404.enabled') && $exclude_paths && !preg_match($exclude_paths, $request->getPathInfo())) {
$fast_paths = $config->get('fast_404.paths');
if ($fast_paths && preg_match($fast_paths, $request->getPathInfo())) {
$fast_404_html = $config->get('fast_404.html');
$fast_404_html = strtr($fast_404_html, array('@path' => String::checkPlain($request->getUri())));
return new Response($fast_404_html, 404);
}
}
// @todo Remove dependency on the internal _system_path attribute:
// https://www.drupal.org/node/2293523.
$system_path = $request->attributes->get('_system_path');
$path = $this->container->get('path.alias_manager')->getPathByAlias(\Drupal::config('system.site')->get('page.404'));
if ($path && $path != $system_path) {
// @todo Um, how do I specify an override URL again? Totally not clear. Do
// that and sub-call the kernel rather than using meah().
// @todo The create() method expects a slash-prefixed path, but we store a
// normal system path in the site_404 variable.
if ($request->getMethod() === 'POST') {
$subrequest = Request::create($request->getBaseUrl() . '/' . $path, 'POST', array('destination' => $system_path, '_exception_statuscode' => 404) + $request->request->all(), $request->cookies->all(), array(), $request->server->all());
} else {
$subrequest = Request::create($request->getBaseUrl() . '/' . $path, 'GET', array('destination' => $system_path, '_exception_statuscode' => 404), $request->cookies->all(), array(), $request->server->all());
}
$response = $this->container->get('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);
$response->setStatusCode(404, 'Not Found');
} else {
$page_content = array('#markup' => $this->t('The requested page "@path" could not be found.', array('@path' => $request->getPathInfo())), '#title' => $this->t('Page not found'));
$fragment = $this->createHtmlFragment($page_content, $request);
$page = $this->fragmentRenderer->render($fragment, 404);
$response = new Response($this->htmlPageRenderer->render($page), $page->getStatusCode());
return $response;
}
return $response;
}
