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\Security\Http\Firewall;
use Psr\Log\LoggerInterface;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolverInterface;
use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
use Symfony\Component\Security\Core\Authentication\Token\RememberMeToken;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
/**
* ContextListener manages the SecurityContext persistence through a session.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ContextListener implements ListenerInterface
{
private $tokenStorage;
private $sessionKey;
private $logger;
private $userProviders;
private $dispatcher;
private $registered;
private $trustResolver;
public function __construct(TokenStorageInterface $tokenStorage, array $userProviders, $contextKey, LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null, AuthenticationTrustResolverInterface $trustResolver = null)
{
if (empty($contextKey)) {
throw new \InvalidArgumentException('$contextKey must not be empty.');
}
foreach ($userProviders as $userProvider) {
if (!$userProvider instanceof UserProviderInterface) {
throw new \InvalidArgumentException(sprintf('User provider "%s" must implement "Symfony\Component\Security\Core\User\UserProviderInterface".', get_class($userProvider)));
}
}
$this->tokenStorage = $tokenStorage;
$this->userProviders = $userProviders;
$this->sessionKey = '_security_'.$contextKey;
$this->logger = $logger;
$this->dispatcher = $dispatcher;
$this->trustResolver = $trustResolver ?: new AuthenticationTrustResolver(AnonymousToken::class, RememberMeToken::class);
}
/**
* Reads the Security Token from the session.
*/
public function handle(GetResponseEvent $event)
{
if (!$this->registered && null !== $this->dispatcher && $event->isMasterRequest()) {
$this->dispatcher->addListener(KernelEvents::RESPONSE, array($this, 'onKernelResponse'));
$this->registered = true;
}
$request = $event->getRequest();
$session = $request->hasPreviousSession() ? $request->getSession() : null;
if (null === $session || null === $token = $session->get($this->sessionKey)) {
$this->tokenStorage->setToken(null);
return;
}
$token = $this->safelyUnserialize($token);
if (null !== $this->logger) {
$this->logger->debug('Read existing security token from the session.', array('key' => $this->sessionKey));
}
if ($token instanceof TokenInterface) {
$token = $this->refreshUser($token);
} elseif (null !== $token) {
if (null !== $this->logger) {
$this->logger->warning('Expected a security token from the session, got something else.', array('key' => $this->sessionKey, 'received' => $token));
}
$token = null;
}
$this->tokenStorage->setToken($token);
}
/**
* Writes the security token into the session.
*/
public function onKernelResponse(FilterResponseEvent $event)
{
if (!$event->isMasterRequest()) {
return;
}
if (!$event->getRequest()->hasSession()) {
return;
}
$this->dispatcher->removeListener(KernelEvents::RESPONSE, array($this, 'onKernelResponse'));
$this->registered = false;
$request = $event->getRequest();
$session = $request->getSession();
if ((null === $token = $this->tokenStorage->getToken()) || $this->trustResolver->isAnonymous($token)) {
if ($request->hasPreviousSession()) {
$session->remove($this->sessionKey);
}
} else {
$session->set($this->sessionKey, serialize($token));
if (null !== $this->logger) {
$this->logger->debug('Stored the security token in the session.', array('key' => $this->sessionKey));
}
}
}
/**
* Refreshes the user by reloading it from the user provider.
*
* @return TokenInterface|null
*
* @throws \RuntimeException
*/
protected function refreshUser(TokenInterface $token)
{
$user = $token->getUser();
if (!$user instanceof UserInterface) {
return $token;
}
$userNotFoundByProvider = false;
foreach ($this->userProviders as $provider) {
try {
$refreshedUser = $provider->refreshUser($user);
$token->setUser($refreshedUser);
if (null !== $this->logger) {
$this->logger->debug('User was reloaded from a user provider.', array('username' => $refreshedUser->getUsername(), 'provider' => get_class($provider)));
}
return $token;
} catch (UnsupportedUserException $e) {
// let's try the next user provider
} catch (UsernameNotFoundException $e) {
if (null !== $this->logger) {
$this->logger->warning('Username could not be found in the selected user provider.', array('username' => $e->getUsername(), 'provider' => get_class($provider)));
}
$userNotFoundByProvider = true;
}
}
if ($userNotFoundByProvider) {
return null;
}
throw new \RuntimeException(sprintf('There is no user provider for user "%s".', get_class($user)));
}
private function safelyUnserialize($serializedToken)
{
$e = $token = null;
$prevUnserializeHandler = ini_set('unserialize_callback_func', __CLASS__.'::handleUnserializeCallback');
$prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = array()) use (&$prevErrorHandler) {
if (__FILE__ === $file) {
throw new \UnexpectedValueException($msg, 0x37313bc);
}
return $prevErrorHandler ? $prevErrorHandler($type, $msg, $file, $line, $context) : false;
});
try {
$token = unserialize($serializedToken);
} catch (\Error $e) {
} catch (\Exception $e) {
}
restore_error_handler();
ini_set('unserialize_callback_func', $prevUnserializeHandler);
if ($e) {
if (!$e instanceof \UnexpectedValueException || 0x37313bc !== $e->getCode()) {
throw $e;
}
if ($this->logger) {
$this->logger->warning('Failed to unserialize the security token from the session.', array('key' => $this->sessionKey, 'received' => $serializedToken, 'exception' => $e));
}
}
return $token;
}
/**
* @internal
*/
public static function handleUnserializeCallback($class)
{
throw new \UnexpectedValueException('Class not found: '.$class, 0x37313bc);
}
}

vendor/symfony/symfony/src/Symfony/Component/Security/Http/Firewall/ContextListener.php line 107