Symfony2 sessions in service - php

Question

I'm getting a problem with Symfony2 sessions.
I'm trying to make a service which is executed at the top of every controller.
The aim of this service is to authenticate user.
I first check the session to see if there is an "auth" key.
If there's not, I check if there is a cookie ...
The problem is on accessing user's session in the service.
I've passed the Request object to my service parameters and I get the session using $request->getSession();.
Everything seems to work but no data is stored in the session ...
I'm pretty sure the problem comes from the way I get session in the service. But, I don't know how I can do it another way.
Can someone help me please ?
Here is my services.yml file :
services:
myBundle.authService:
class: MyCompany\MyBundle\Services\AuthService
scope: request
arguments:
request: #request
logger: #logger
em: #doctrine.orm.entity_manager
Here is my AuthService class :
namespace MyCompany\MyBundle\Services;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Encoder\XmlEncoder;
use Symfony\Component\Serializer\Encoder\JsonEncoder;
use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
use Doctrine\ORM\EntityManager;
use Monolog\Logger;
use MyCompany\MyBundle\Entity\User;
use MyCompany\MyBundle\Entity\Session;
class AuthService
{
private $_request;
private $_logger;
private $_em;
private $_session;
public function __construct(Request $request, Logger $logger, EntityManager $em)
{
$this->_request = $request;
$this->_logger = $logger;
$this->_em = $em;
$this->_session = $this->_request->getSession();
$this->_session->start();
$this->_fUser = null;
$encoders = array(new XmlEncoder(), new JsonEncoder());
$normalizers = array(new GetSetMethodNormalizer());
$this->_serializer = new Serializer($normalizers, $encoders);
}
// THIS FUNCTION IS CALLED IN CONTROLLER
public function checkAuth()
{
$_return = false;
if($this->checkSession())
{
$_return = true;
}
else
{
$userCookie = $this->checkCookie();
if($userCookie)
{
if(is_array($userCookie) && array_key_exists('token', $userCookie) && array_key_exists('value', $userCookie))
{
$fUser = $this->findUserBySession($userCookie['token'], $userCookie['value']);
if($fUser)
{
$_return = $this->updateSession($fUser);
}
}
}
}
return $_return;
}
// CHECK IF SESSION HAS 'FUSER' KEY AND 'AUTH' KEY
private function checkSession()
{
$_return = false;
if($this->_session && $this->_session->has("FUSER") && $this->_session->has("AUTH") && preg_match("/[0-9a-zA-Z]{58}/", $this->_session->get("AUTH")) === true)
{
// I NEVER GO HERE
$this->_logger->info("OK \o/");
$_return = $this->_session->get('FUSER');
}
return $_return;
}
// CHECK IF AUTH COOKIE IS SET
private function checkCookie()
{
$_return = false;
$cookies = $this->_request->cookies;
if($cookies && count($cookies) > 0)
{
foreach($cookies as $key => $val)
{
if(preg_match("/[0-9a-zA-Z]{58}/", $key) && preg_match("/[0-9a-zA-Z]{58}/", $val))
{
$_return = array('token' => $key, 'value' => $val);
}
}
}
return $_return;
}
// FIND SESSION IN DB AND USER ASSOCIATED
private function findUserBySession($token, $value)
{
$_return = false;
$fSessionRepository = $this->_em->getRepository("MyCompanyBundle:FSession");
if($fSessionRepository)
{
$fSession = $fSessionRepository->findOneBy(array('token' => $value));
if($fSession)
{
$fUser = $fSession->getUser();
if($fUser)
{
if($fUser->getToken() === $token)
{
$_return = $fUser;
}
}
}
}
return $_return;
}
// UPDATE SESSION TO REGISTER 'USER' AND 'AUTH' KEYS
public function updateSession(User $fUser)
{
$_return = false;
if($this->_session)
{
$this->_session->set('FUSER', $this->serialize($fUser, 'json'));
$this->_session->set('AUTH', User::generateToken());
// THIS WORKS FINE
$this->_logger->info("OK !!! _o/");
$_return = $this->serialize($fUser, 'json');
}
return $_return;
}
// SERIALIZE OBJECT
public function serialize($JSONObject, $format)
{
return $this->_serializer->serialize($JSONObject, $format);
}
// DESERIALIZE OBJECT
public function deserialize($JSONObject, $entity, $format)
{
return $this->_serializer->deserialize($JSONObject, $entity, $format);
}
}
Thank you in advance for your time and help.