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    <p>This uses a twig helper and render a template with '' notation using facebook sdk js.</p> <p>If you need to redirect to the login-page, use an html link, call the method 'getLoginUrl' from the php facebook sdk</p> <p>You can access to it via the service <code>'fos_facebook.api'</code> register through FOSFacebookBundle</p> <p><strong>Updated with code examples</strong></p> <p>Here is the javascript code i use to login with facebook 'frictionless'</p> <pre><code>&lt;script&gt; //scopes string stored as container parameter var fb_scope='{{ facebook_scope }}'; //connected in sf2 app ? {% if app.user %} var isLogged=true; {% else %} var isLogged=false; {% endif %} //var to store fb status var fb_connected = false; function onFbInit() { if (typeof(FB) != 'undefined' &amp;&amp; FB != null ) { // fetch the status on load FB.getLoginStatus(handleSessionResponse); //my facebook connect link $('a.facebook_connect').on('click', function(e) { FB.login(function(response) { if (response.authResponse) { checkAccount(); } else { onAuthRefusal(); } }, {scope: fb_scope}); e.preventDefault(); }); //my logout link $('#logout').on('click', function(e) { FB.logout(null); }); //want to distinguish three status states FB.Event.subscribe('auth.statusChange', handleSessionResponse); } } function handleSessionResponse(response) { if (response.status === 'connected') { // the user is logged in and has authenticated your // app, and response.authResponse supplies // the user's ID, a valid access token, a signed // request, and the time the access token // and signed request each expire var uid = response.authResponse.userID; var accessToken = response.authResponse.accessToken; var expiresIn = response.authResponse.expiresIn; //already logged in sf2 app if(!isLogged){ checkAccount(); } fb_connected = true; } else if (response.status === 'not_authorized') { // the user is logged in to Facebook, // but has not authenticated your app fb_connected = false; } else { // the user isn't logged in to Facebook. fb_connected = false; } } function checkAccount(){ //route defined in your security.yml ( check_path value in your fos_facebook firewall ) top.location.href = '{{ path('_security_check_facebook' ) }}'; } function onAuthRefusal(){ //message, special page ? console.log('refused authentification, message to display ?'); } &lt;/script&gt; {{ facebook_initialize({'xfbml': true, 'fbAsyncInit': 'onFbInit();', 'frictionlessRequests' : 'true'} ) }} </code></pre> <p>I have also defined a route ( /login/facebook ) that redirects to facebook auth </p> <pre><code>//controller action for /login/facebook pattern function loginFacebookAction() { //get facebook api service registered by FacebookBundle $api = $this-&gt;container-&gt;get('fos_facebook.api'); //get scope provided in url or default $scope = $this-&gt;container-&gt;get('request')-&gt;get('scope', 'publish_stream'); //generate call url that use facebook check_path (used by FacebookBundle for authentification) $callback = $this-&gt;container-&gt;get('router')-&gt;generate('_security_check_facebook',array(), true); $redirect_url = $api-&gt;getLoginUrl(array('scope' =&gt; $scope, 'redirect_uri' =&gt; $callback)); return new RedirectResponse($redirect_url); } </code></pre> <p>And this is it !</p>
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