使用FOSUserBundle进行Google+身份验证

# app/config/config.yml
fos_user:
    firewall_name: main
    user_class: AppBundle\Entity\User
    from_email:
        address: "%mailer_user%"
        sender_name: "%mailer_user%"

hwi_oauth:
    firewall_name: main
    resource_owners:
        google:
            type: google
            client_id: <YOUR_CLIENT_ID>
            client_secret: <YOUR_CLIENT_SECRET>
            scope: "email profile"
            options:
                access_type: offline
    fosub:
        username_iterations: 30

// src/Bundle/UserBundle/EventListener/AuthentificationListener.php
namespace AppBundle\EventListener;

use HWI\Bundle\OAuthBundle\Security\Core\Exception\AccountNotLinkedException;
use HWI\Bundle\OAuthBundle\Security\Core\Exception\AccountNotConnectedException;
use HWI\Bundle\OAuthBundle\Security\Core\User\FOSUBUserProvider;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException;
use Symfony\Component\Security\Core\Exception\CustomUserMessageAuthenticationException;
use Symfony\Component\Security\Core\Exception\InvalidCsrfTokenException;
use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;

class AuthentificationListener extends FOSUBUserProvider
{
    protected $requestStack;

    public function __construct(RequestStack $requestStack)
    {
        $this->requestStack = $requestStack;
    }

    public function loadUserByOAuthUserResponse(UserResponseInterface $response)
    {
        $username = $response->getUsername();
        $user = $this->findUserByUsername($username);

        if (!$user) {
            $user = $this->createUser($response);
            $this->saveUser($user);
        }

        return $user;
    }

    protected function findUserByUsername($username)
    {
        return $this->userManager->findUserByUsername($username);
    }

    protected function createUser(UserResponseInterface $response)
    {
        $user = $this->userManager->createUser();
        $user->setUsername($response->getUsername());
        $user->setEmail($response->getEmail());
        $user->setFirstName($response->getFirstName());
        $user->setLastName($response->getLastName());

        return $user;
    }

    protected function saveUser(UserInterface $user)
    {
        $this->userManager->updateUser($user);
    }
}