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