Access Token from JavaScript API

Question

I'm working on a small game, where the user can play one time each day. I will track this via the Facebook ID.

All the backend is done, and the game works when I manually insert my Facebook ID and access token.... But how do I get the access token from the Facebook API?

I tried this:

FB.init({ 
            appId: 'my app id', 
            channelURL : '//my domain/channel.html', // Channel File
            cookie: true, 
            xfbml: true, 
            status: true 
        });

        FB.getLoginStatus(function (response) {
            if (response.session) {
                alert(response.session.access_token);
            } else {
                alert("not logged in");
            }
        });

But it always alerted "Not logged in", even if I'm logged into Facebook.

(My domain and app ID is hidden due to privacy of my client)

Answer 1

You should definatly Migrate to oAuth2, (if you haven't - you should), then you can try this :

FB.getLoginStatus(function(response) {
    if (response.authResponse && response.status=="connected") {
        uid = response.authResponse.userID;
        token = response.authResponse.accessToken;
        // user is logged in
    }
}); 

For the javascript SDK all you have to do in order to migrate to oAuth2 is add an additional parameter to the initialization :
oauth : true