symfony/connect-bundle

About

This is the official bundle of the SymfonyConnect SDK.

Installation

Step 1: Install symfony/connect-bundle using Composer

$ composer require symfonycorp/connect-bundle

If you're not using Symfony Flex, please take inspiration from this bundle's recipe to enable it.

Step 2: Configure your .env.local file

SYMFONY_CONNECT_APP_ID='Your app id'
SYMFONY_CONNECT_APP_SECRET='Your app secret'

Usage

Use SymfonyConnect to authenticate your user

Step 1: Configure the security

Note: If you want to persist your users, read the Cookbooks section.

If you don't want to persist your users, you can use ConnectInMemoryUserProvider:

# config/packages/security.yaml
security:
    providers:
        symfony_connect:
            connect_memory: ~
    firewalls:
        # [...]

        secured_area:
            pattern: ^/
            symfony_connect:
                check_path: symfony_connect_callback
                login_path: symfony_connect_login
                failure_path: home # need to be adapted to your config, see step 4
                remember_me: false
                provider: symfony_connect
            anonymous: true

You can also load specific roles for some users:

# config/packages/security.yaml
security:
    providers:
        symfony_connect:
            connect_memory:
                users:
                    90f28e69-9ce9-4a42-8b0e-e8c7fcc27713: "ROLE_CONNECT_USER ROLE_ADMIN"

Note: The username is the user uuid.

Step 2: Add some link to your templates

You can generate a link to the SymfonyConnect login page:

<a href="{{ url('symfony_connect_login') }}">Connect</a>

You can also specify the target URL after connection:

<a href="{{ url('symfony_connect_login') }}?target=XXX">Connect</a>

Step 3: Play with the user

The API user is available through the token storage, which you can get by autowiring Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface $tokenStorage.

$user = $tokenStorage->getToken()->getApiUser();

If you use the built-in security component, you can access to the root api directly by autowiring SymfonyCorp\Connect\Api\Api $api:

$user = $api->getRoot()->getCurrentUser();

You can also get access to the API root object by providing an access token explicitly:

$accessToken = $tokenStorage->getToken()->getAccessToken();
$api->setAccessToken($accessToken);
$root = $api->getRoot();
$user = $root->getCurrentUser();

Step 4: Handling Failures

Several errors can occur during the OAuth dance, for example the user can deny your application or the scope you defined in symfony_connect.yaml can be different from what you selected while creating your application on SymfonyConnect. Theses failures arehandled by the default Symfony failure handling.

Therefore, if an error occurred, the error is stored in the session (with a fallback on query attributes) and the user is redirected to the route/path specificed in failure_path node of the symfony_connect section of your firewall in security.yaml.

Warning: You need to specifiy failure_path. If you don't, the user will be redirected back to login_path, meaning that will launch the SymfonyConnect authentication and redirect the user to SymfonyConnect which can lead to a redirection loop.

This means you need to fetch the authentication error if there is one and display it in the view. This is similar to what you do for a typical login form on Symfony (here we assume you have a home route pointing to the following controller):

// src/Controller/HomeController.php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Security\Core\Security;

class HomeController extends AbstractController
{
    /**
     * @Route("/", name="home")
     */
    public function home(Request $request)
    {
        $session = $request->hasSession() ? $request->getSession() : null;

        // get the authentication error if there is one
        if ($request->attributes->has(Security::AUTHENTICATION_ERROR)) {
            $error = $request->attributes->get(Security::AUTHENTICATION_ERROR);
        } elseif (null !== $session && $session->has(Security::AUTHENTICATION_ERROR)) {
            $error = $session->get(Security::AUTHENTICATION_ERROR);
            $session->remove(Security::AUTHENTICATION_ERROR);
        } else {
            $error = '';
        }

        return $this->render('home.html.twig', ['error' => $error]);
    }
}

And then adapt your twig template:

{# templates/home.html.twig #}

{% if app.user %}
    Congrats! You are authenticated with SymfonyConnect
{% elseif error %}
    {{ error.messageKey | trans(error.messageData, 'security') }}
{% else %}
    <a href="{{ url('symfony_connect_login') }}">Log in with SymfonyConnect</a>
{% endif %}

Cookbooks

How to persist users

Step 1 - Create a User entity

<?php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;
use SymfonyCorp\Connect\Api\Entity\User as ConnectApiUser;
use Symfony\Component\Security\Core\User\UserInterface;

/**
 * @ORM\Table(name="user")
 * @ORM\Entity(repositoryClass="App\Repository\UserRepository")
 */
class User implements UserInterface
{
    /** @ORM\Column(type="integer") @ORM\Id @ORM\GeneratedValue(strategy="AUTO") */
    private $id;

    /** @ORM\Column(type="string", length=255) */
    private $uuid;

    /** @ORM\Column(type="string", length=255) */
    private $username;

    /** @ORM\Column(type="string", length=255) */
    private $name;

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

    public function updateFromConnect(ConnectApiUser $apiUser)
    {
        $this->username = $apiUser->getUsername();
        $this->name = $apiUser->getName();
    }

    public function getUuid()
    {
        return $this->uuid;
    }

    public function getUsername()
    {
        return $this->username;
    }

    public function getName()
    {
        return $this->name;
    }

    public function getRoles()
    {
        return ['ROLE_USER'];
    }

    public function getPassword()
    {
    }

    public function getSalt()
    {
    }

    public function eraseCredentials()
    {
    }
}

Step 2 - Create the repository

<?php

namespace App\Repository;

use App\Entity\User;
use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;

class UserRepository extends ServiceEntityRepository implements UserProviderInterface
{
    public function __construct(RegistryInterface $registry)
    {
        parent::__construct($registry, User::class);
    }

    public function loadUserByUsername($uuid)
    {
        return $this->findOneByUuid($uuid) ?: new User($uuid);
    }

    public function refreshUser(UserInterface $user)
    {
        if (!$user instanceof User) {
            throw new UnsupportedUserException(sprintf('class %s is not supported', get_class($user)));
        }

        return $this->loadUserByUsername($user->getUuid());
    }

    public function supportsClass($class)
    {
        return User::class === $class;
    }
}

Don't forget to update your database.

Step 3 - Create the event listener

<?php

namespace App\EventListener;

use Doctrine\ORM\EntityManagerInterface;
use SymfonyCorp\Connect\Security\Authentication\Token\ConnectToken;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
use Symfony\Component\Security\Http\SecurityEvents;

class SecurityInteractiveLoginListener implements EventSubscriberInterface
{
    private $em;

    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
    }

    public function registerUser(InteractiveLoginEvent $event)
    {
        $token = $event->getAuthenticationToken();

        if (!$token instanceof ConnectToken) {
            return;
        }

        $user = $token->getUser();
        $user->updateFromConnect($token->getApiUser());

        $this->em->persist($user);
        $this->em->flush($user);
    }

    public static function getSubscribedEvents()
    {
        return [
            SecurityEvents::INTERACTIVE_LOGIN => 'registerUser',
        ];
    }
}

Step 4 - Configure security

# config/packages/security.yaml
security:
    encoders:
        App\Entity\User: plaintext

    providers:
        symfony_connect:
            id: App\Repository\UserRepository

Step 5 - Enjoy

You can store more things if you want. But don't forget to update your application scope.

License

This bundle is licensed under the MIT license.