141 lines
4.3 KiB
PHP
141 lines
4.3 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\Security\Http;
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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\FinishRequestEvent;
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use Symfony\Component\HttpKernel\Event\RequestEvent;
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use Symfony\Component\HttpKernel\KernelEvents;
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use Symfony\Component\Security\Http\Firewall\ExceptionListener;
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use Symfony\Component\Security\Http\Firewall\FirewallListenerInterface;
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use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
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/**
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* Firewall uses a FirewallMap to register security listeners for the given
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* request.
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*
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* It allows for different security strategies within the same application
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* (a Basic authentication for the /api, and a web based authentication for
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* everything else for instance).
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Firewall implements EventSubscriberInterface
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{
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private FirewallMapInterface $map;
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private EventDispatcherInterface $dispatcher;
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/**
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* @var \SplObjectStorage<Request, ExceptionListener>
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*/
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private \SplObjectStorage $exceptionListeners;
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public function __construct(FirewallMapInterface $map, EventDispatcherInterface $dispatcher)
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{
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$this->map = $map;
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$this->dispatcher = $dispatcher;
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$this->exceptionListeners = new \SplObjectStorage();
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}
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/**
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* @return void
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*/
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public function onKernelRequest(RequestEvent $event)
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{
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if (!$event->isMainRequest()) {
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return;
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}
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// register listeners for this firewall
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$listeners = $this->map->getListeners($event->getRequest());
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$authenticationListeners = $listeners[0];
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$exceptionListener = $listeners[1];
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$logoutListener = $listeners[2];
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if (null !== $exceptionListener) {
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$this->exceptionListeners[$event->getRequest()] = $exceptionListener;
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$exceptionListener->register($this->dispatcher);
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}
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// Authentication listeners are pre-sorted by SortFirewallListenersPass
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$authenticationListeners = function () use ($authenticationListeners, $logoutListener) {
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if (null !== $logoutListener) {
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$logoutListenerPriority = $this->getListenerPriority($logoutListener);
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}
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foreach ($authenticationListeners as $listener) {
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$listenerPriority = $this->getListenerPriority($listener);
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// Yielding the LogoutListener at the correct position
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if (null !== $logoutListener && $listenerPriority < $logoutListenerPriority) {
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yield $logoutListener;
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$logoutListener = null;
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}
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yield $listener;
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}
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// When LogoutListener has the lowest priority of all listeners
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if (null !== $logoutListener) {
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yield $logoutListener;
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}
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};
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$this->callListeners($event, $authenticationListeners());
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}
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/**
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* @return void
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*/
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public function onKernelFinishRequest(FinishRequestEvent $event)
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{
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$request = $event->getRequest();
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if (isset($this->exceptionListeners[$request])) {
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$this->exceptionListeners[$request]->unregister($this->dispatcher);
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unset($this->exceptionListeners[$request]);
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}
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}
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/**
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* @return array
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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', 8],
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KernelEvents::FINISH_REQUEST => 'onKernelFinishRequest',
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];
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}
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/**
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* @return void
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*/
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protected function callListeners(RequestEvent $event, iterable $listeners)
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{
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foreach ($listeners as $listener) {
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$listener($event);
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if ($event->hasResponse()) {
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break;
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}
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}
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}
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private function getListenerPriority(object $logoutListener): int
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{
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return $logoutListener instanceof FirewallListenerInterface ? $logoutListener->getPriority() : 0;
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}
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}
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