This Bundle enables integration of the Facebook PHP and JS SDK's. Furthermore it also provides a Symfony2 authentication provider so that users can login to a Symfony2 application via Facebook. Furthermore via custom user provider support the Facebook login can also be integrated with other data sources like the database based solution provided by FOSUserBundle.
Note that logging in a user requires multiple steps:
- the user must be logged into Facebook
- the user must connect his Facebook account to your site
- once the user has done 1. and 2. you must trigger the login
For step 1. and 2. there are two options:
- Select "OAuth Migration" in the Facebook application settings.
- Add a Facebook login button, this approach requires JS code to handle step 3.
- Letting FOSFacebookBundle redirect to the Facebook login page.
Note that the later happens automatically if the first provider in your first firewall configuration is configured to FOSFacebookBundle and the user accesses a page that requires authentication without being authenticated.
Please also refer to the Facebook documentation: https://developers.facebook.com/docs/guides/web/
Please also refer to the official documentation of the SecurityBundle, especially for details on the configuration: http://symfony.com/doc/current/book/security.html
This version requires Symfony 2.1
- Add the following lines in your composer.json:
{
"require": {
"friendsofsymfony/facebook-bundle": "dev-master"
}
}
- Run the composer to download the bundle
$ php composer.phar update friendsofsymfony/facebook-bundle-
Add this bundle to your application's kernel:
// app/ApplicationKernel.php public function registerBundles() { return array( // ... new FOS\FacebookBundle\FOSFacebookBundle(), // ... ); } -
Add the following routes to your application and point them at actual controller actions
#application/config/routing.yml _security_check: pattern: /login_check _security_logout: pattern: /logout #application/config/routing.xml <route id="_security_check" pattern="/login_check" /> <route id="_security_logout" pattern="/logout" /> -
Configure the
facebookservice in your config:# application/config/config.yml fos_facebook: file: %kernel.root_dir%/../vendor/facebook/src/base_facebook.php alias: facebook app_id: 123456879 secret: s3cr3t cookie: true permissions: [email, user_birthday, user_location] # application/config/config.xml <fos_facebook:api file="%kernel.root_dir%/../vendor/facebook/src/base_facebook.php" alias="facebook" app_id="123456879" secret="s3cr3t" cookie="true" > <permission>email</permission> <permission>user_birthday</permission> <permission>user_location</permission> </fos_facebook:api>If you do not include a
filevalue in the config you will have to configure your application to autoload theBaseFacebookclass. -
Add this configuration if you want to use the
security component:# application/config/config.yml security: firewalls: public: # since anonymous is allowed users will not be forced to login pattern: ^/.* fos_facebook: app_url: "http://apps.facebook.com/appName/" server_url: "http://localhost/facebookApp/" anonymous: true logout: handlers: ["fos_facebook.logout_handler"] access_control: - { path: ^/secured/.*, role: [IS_AUTHENTICATED_FULLY] } # This is the route secured with fos_facebook - { path: ^/.*, role: [IS_AUTHENTICATED_ANONYMOUSLY] }You have to add
/secured/in your routing for this to work. An example would be..._facebook_secured: pattern: /secured/ defaults: { _controller: AcmeDemoBundle:Welcome:index } -
Optionally define a custom user provider class and use it as the provider or define path for login
# application/config/config.yml security: providers: # choose the provider name freely my_fos_facebook_provider: id: my.facebook.user # see "Example Custom User Provider using the FOS\UserBundle" chapter further down firewalls: public: pattern: ^/.* fos_facebook: app_url: "http://apps.facebook.com/appName/" server_url: "http://localhost/facebookApp/" login_path: /login check_path: /login_check default_target_path: / provider: my_fos_facebook_provider anonymous: true logout: handlers: ["fos_facebook.logout_handler"] # application/config/config_dev.yml security: firewalls: public: fos_facebook: app_url: "http://apps.facebook.com/appName/" server_url: "http://localhost/facebookApp/app_dev.php/" -
Optionally use access control to secure specific URLs
# application/config/config.yml security: # ... access_control: - { path: ^/facebook/, role: [ROLE_FACEBOOK] } - { path: ^/.*, role: [IS_AUTHENTICATED_ANONYMOUSLY] }
The role `ROLE_FACEBOOK` has to be added in your User class (see Acme\MyBundle\Entity\User::setFBData() below).
> Note that the order of access control rules matters!
A templating helper is included for loading the Facebook JavaScript SDK and
initializing it with parameters from your service container. To setup the
Facebook JavaScript environment, add the following to your layout just after
the opening body tag:
<body>
<!-- inside a php template -->
<?php echo $view['facebook']->initialize(array('xfbml' => true, 'fbAsyncInit' => 'onFbInit();')) ?>
<!-- inside a twig template -->
{{ facebook_initialize({'xfbml': true, 'fbAsyncInit': 'onFbInit();'}) }}
Note that fbAsyncInit is a parameter helping you to execute JavaScript within
the function initializing the connection with Facebook, just after the FB.init();
call. onFbInit(); is a JavaScript function defined furthermore to execute functions
which need FB initialized.
If you will be adding XFBML markup to your site you may also declare the
namespace, perhaps in the opening html tag:
<html xmlns:fb="http://www.facebook.com/2008/fbml">
Just add the following code in one of your templates:
<!-- inside a php template -->
<?php echo $view['facebook']->loginButton(array('autologoutlink' => true)) ?>
<!-- inside a twig template -->
{{ facebook_login_button({'autologoutlink': true}) }}
Note that with this approach only the login and connecting with Facebook will
be handled. The step of logging in the user into your Symfony2 application
still needs to be triggered. To do this you will in most cases simply subscribe
to the auth.statusChange event and then redirect to the check_path:
<script>
function goLogIn(){
window.location = "{{ path('_security_check') }}";
}
function onFbInit() {
if (typeof(FB) != 'undefined' && FB != null ) {
FB.Event.subscribe('auth.statusChange', function(response) {
setTimeout(goLogIn, 500);
});
}
}
</script>
Note that we wait 500ms before redirecting to let the browser dealing with the Facebook cookie. You can avoid this step but you might get this error message: "The Facebook user could not be retrieved from the session."
The "_security_check" route would need to point to a "/login_check" pattern to match the above configuration.
Also, you need to trigger the logout action, so, using the same event (auth.statusChange), add a simple
check for response.session to redirect to the "logout" route:
<script>
function goLogIn(){
window.location.href = "{{ path('_security_check') }}";
}
function onFbInit() {
if (typeof(FB) != 'undefined' && FB != null ) {
FB.Event.subscribe('auth.statusChange', function(response) {
if (response.session || response.authResponse) {
setTimeout(goLogIn, 500);
} else {
window.location.href = "{{ path('_security_logout') }}";
}
});
}
}
</script>
This requires adding a service for the custom user provider which is then set to the provider id in the "provider" section in the config.yml:
services:
my.facebook.user:
class: Acme\MyBundle\Security\User\Provider\FacebookProvider
arguments:
facebook: "@fos_facebook.api"
userManager: "@fos_user.user_manager"
validator: "@validator"
container: "@service_container"
<?php
namespace Acme\MyBundle\Security\User\Provider;
use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
use Symfony\Component\Security\Core\Exception\UnsupportedUserException;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Security\Core\User\UserInterface;
use \BaseFacebook;
use \FacebookApiException;
class FacebookProvider implements UserProviderInterface
{
/**
* @var \Facebook
*/
protected $facebook;
protected $userManager;
protected $validator;
public function __construct(BaseFacebook $facebook, $userManager, $validator)
{
$this->facebook = $facebook;
$this->userManager = $userManager;
$this->validator = $validator;
}
public function supportsClass($class)
{
return $this->userManager->supportsClass($class);
}
public function findUserByFbId($fbId)
{
return $this->userManager->findUserBy(array('facebookId' => $fbId));
}
public function loadUserByUsername($username)
{
$user = $this->findUserByFbId($username);
try {
$fbdata = $this->facebook->api('/me');
} catch (FacebookApiException $e) {
$fbdata = null;
}
if (!empty($fbdata)) {
if (empty($user)) {
$user = $this->userManager->createUser();
$user->setEnabled(true);
$user->setPassword('');
}
// TODO use http://developers.facebook.com/docs/api/realtime
$user->setFBData($fbdata);
if (count($this->validator->validate($user, 'Facebook'))) {
// TODO: the user was found obviously, but doesnt match our expectations, do something smart
throw new UsernameNotFoundException('The facebook user could not be stored');
}
$this->userManager->updateUser($user);
}
if (empty($user)) {
throw new UsernameNotFoundException('The user is not authenticated on facebook');
}
return $user;
}
public function refreshUser(UserInterface $user)
{
if (!$this->supportsClass(get_class($user)) || !$user->getFacebookId()) {
throw new UnsupportedUserException(sprintf('Instances of "%s" are not supported.', get_class($user)));
}
return $this->loadUserByUsername($user->getFacebookId());
}
}
Finally one also needs to add a getFacebookId() and setFBData() method to the User model. The following example also adds "firstname" and "lastname" properties, using the Doctrine ORM:
<?php
namespace Acme\MyBundle\Entity;
use FOS\UserBundle\Entity\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;
class User extends BaseUser
{
/**
* @var string
*
* @ORM\Column(name="firstname", type="string", length=255)
*/
protected $firstname;
/**
* @var string
*
* @ORM\Column(name="lastname", type="string", length=255)
*/
protected $lastname;
/**
* @var string
*
* @ORM\Column(name="facebookId", type="string", length=255)
*/
protected $facebookId;
public function serialize()
{
return serialize(array($this->facebookId, parent::serialize()));
}
public function unserialize($data)
{
list($this->facebookId, $parentData) = unserialize($data);
parent::unserialize($parentData);
}
/**
* @return string
*/
public function getFirstname()
{
return $this->firstname;
}
/**
* @param string $firstname
*/
public function setFirstname($firstname)
{
$this->firstname = $firstname;
}
/**
* @return string
*/
public function getLastname()
{
return $this->lastname;
}
/**
* @param string $lastname
*/
public function setLastname($lastname)
{
$this->lastname = $lastname;
}
/**
* Get the full name of the user (first + last name)
* @return string
*/
public function getFullName()
{
return $this->getFirstName() . ' ' . $this->getLastname();
}
/**
* @param string $facebookId
* @return void
*/
public function setFacebookId($facebookId)
{
$this->facebookId = $facebookId;
$this->setUsername($facebookId);
$this->salt = '';
}
/**
* @return string
*/
public function getFacebookId()
{
return $this->facebookId;
}
/**
* @param Array
*/
public function setFBData($fbdata)
{
if (isset($fbdata['id'])) {
$this->setFacebookId($fbdata['id']);
$this->addRole('ROLE_FACEBOOK');
}
if (isset($fbdata['first_name'])) {
$this->setFirstname($fbdata['first_name']);
}
if (isset($fbdata['last_name'])) {
$this->setLastname($fbdata['last_name']);
}
if (isset($fbdata['email'])) {
$this->setEmail($fbdata['email']);
}
}
}