Symfony Profiler

<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpKernel\EventListener;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\UriSigner;
/**
* Handles content fragments represented by special URIs.
*
* All URL paths starting with /_fragment are handled as
* content fragments by this listener.
*
* Throws an AccessDeniedHttpException exception if the request
* is not signed or if it is not an internal sub-request.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @final since Symfony 4.3
*/
class FragmentListener implements EventSubscriberInterface
{
private $signer;
private $fragmentPath;
/**
* @param string $fragmentPath The path that triggers this listener
*/
public function __construct(UriSigner $signer, string $fragmentPath = '/_fragment')
{
$this->signer = $signer;
$this->fragmentPath = $fragmentPath;
}
/**
* Fixes request attributes when the path is '/_fragment'.
*
* @throws AccessDeniedHttpException if the request does not come from a trusted IP
*/
public function onKernelRequest(GetResponseEvent $event)
{
$request = $event->getRequest();
if ($this->fragmentPath !== rawurldecode($request->getPathInfo())) {
return;
}
if ($request->attributes->has('_controller')) {
// Is a sub-request: no need to parse _path but it should still be removed from query parameters as below.
$request->query->remove('_path');
return;
}
if ($event->isMasterRequest()) {
$this->validateRequest($request);
}
parse_str($request->query->get('_path', ''), $attributes);
$request->attributes->add($attributes);
$request->attributes->set('_route_params', array_replace($request->attributes->get('_route_params', []), $attributes));
$request->query->remove('_path');
}
protected function validateRequest(Request $request)
{
// is the Request safe?
if (!$request->isMethodSafe()) {
throw new AccessDeniedHttpException();
}
// is the Request signed?
// we cannot use $request->getUri() here as we want to work with the original URI (no query string reordering)
if ($this->signer->check($request->getSchemeAndHttpHost().$request->getBaseUrl().$request->getPathInfo().(null !== ($qs = $request->server->get('QUERY_STRING')) ? '?'.$qs : ''))) {
return;
}
throw new AccessDeniedHttpException();
}
public static function getSubscribedEvents()
{
return [
KernelEvents::REQUEST => [['onKernelRequest', 48]],
];
}
}

vendor/symfony/http-kernel/EventListener/FragmentListener.php line 78