FB.logout() called without an access token

Question

I'm trying to log out of a website i've created with Facebook integrated. Logging in works fine, but when I want to log out Firebug consistently gives me this error:

FB.logout() called without an access token.

I'm using the Facebook JavaScript SDK, and the code I've got to logout looks like this:

$(document).ready($(function () {     $("#fblogout").click(facebooklogout); }));  function facebooklogout() {     FB.logout(function (response) {     } )}; 

This is the logout code specified at the Facebook Developers Documentation just with a button being assigned the method on document.ready

Before this code I have the FB.init() method, that all runs fine.

If anyone's got a solution as to why FB.logout doesn't have an access token, it'd be appreciated.

Answer 1

To logout from the application which uses facebook graph API, use this JavaScript on the logout page just after the <form> tag:

window.onload=function() {     // initialize the library with your Facebook API key     FB.init({ apiKey: 'b65c1efa72f570xxxxxxxxxxxxxxxxx' });      //Fetch the status so that we can log out.     //You must have the login status before you can logout,     //and if you authenticated via oAuth (server side), this is necessary.     //If you logged in via the JavaScript SDK, you can simply call FB.logout()     //once the login status is fetched, call handleSessionResponse     FB.getLoginStatus(handleSessionResponse); }  //handle a session response from any of the auth related calls function handleSessionResponse(response) {     //if we dont have a session (which means the user has been logged out, redirect the user)     if (!response.session) {         window.location = "/mysite/Login.aspx";         return;     }      //if we do have a non-null response.session, call FB.logout(),     //the JS method will log the user out of Facebook and remove any authorization cookies     FB.logout(handleSessionResponse); } 

The code works and is live on my site.

Answer 2

I went for the less trivial solution:

    function facebookLogout(){         FB.getLoginStatus(function(response) {             if (response.status === 'connected') {                 FB.logout(function(response) {                     // this part just clears the $_SESSION var                     // replace with your own code                     $.post("/logout").done(function() {                         $('#status').html('<p>Logged out.</p>');                     });                 });             }         });     }