How to get access token from FB.login method in javascript SDK - facebook

Question

I need to get the access token from FB.login method in Javascript SDK. My login code is
FB.login(function(response) {
if (response.session) {
if (response.perms) {
} else {
// user is logged in, but did not grant any permissions
alert("No Permission..");
}
} else {
// user is not logged in
alert("Please login to facebook");
}
}, {perms:'read_stream,publish_stream,offline_access'});
Is there any way to get access token? I am able to get the access token using PHP.

Answer 1

You can get access token using FB.getAuthResponse()['accessToken']:
FB.login(function(response) {
if (response.authResponse) {
var access_token = FB.getAuthResponse()['accessToken'];
console.log('Access Token = '+ access_token);
FB.api('/me', function(response) {
console.log('Good to see you, ' + response.name + '.');
});
} else {
console.log('User cancelled login or did not fully authorize.');
}
}, {scope: ''});
Edit:
Updated to use Oauth 2.0, required since December 2011. Now uses FB.getAuthResponse();
If you are using a browser that does not have a console, (I'm talking to you, Internet Explorer) be sure to comment out the console.log lines or use a log-failsafe script such as:
if (typeof(console) == "undefined") { console = {}; }
if (typeof(console.log) == "undefined") { console.log = function() { return 0; } }

Answer 2

response.session.access_token doesn't work in my code. But this works:
response.authResponse.accessToken
FB.login(function(response) { alert(response.authResponse.accessToken);
}, {perms:'read_stream,publish_stream,offline_access'});

Answer 3

If you are already connected, simply type this in the javascript console:
FB.getAuthResponse()['accessToken']

Answer 4

https://developers.facebook.com/docs/facebook-login/login-flow-for-web/
{
status: 'connected',
authResponse: {
accessToken: '...',
expiresIn:'...',
signedRequest:'...',
userID:'...'
}
}
FB.login(function(response) {
if (response.authResponse) {
// The person logged into your app
} else {
// The person cancelled the login dialog
}
});

Answer 5

response.session doesn't work anymore because response.authResponse is the new way to access the response content after the oauth migration.Check this for details:
SDKs & Tools › JavaScript SDK › FB.login

Answer 6

window.fbAsyncInit = function () {
FB.init({
appId: 'Your-appId',
cookie: false, // enable cookies to allow the server to access
// the session
xfbml: true, // parse social plugins on this page
version: 'v2.0' // use version 2.0
});
};
// Load the SDK asynchronously
(function (d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
function fb_login() {
FB.login(function (response) {
if (response.authResponse) {
console.log('Welcome! Fetching your information.... ');
//console.log(response); // dump complete info
access_token = response.authResponse.accessToken; //get access token
user_id = response.authResponse.userID; //get FB UID
FB.api('/me', function (response) {
var email = response.email;
var name = response.name;
window.location = 'http://localhost:12962/Account/FacebookLogin/' + email + '/' + name;
// used in my mvc3 controller for //AuthenticationFormsAuthentication.SetAuthCookie(email, true);
});
} else {
//user hit cancel button
console.log('User cancelled login or did not fully authorize.');
}
}, {
scope: 'email'
});
}
<!-- custom image -->
<img src="/Public/assets/images/facebook/facebook_connect_button.png" />
<!-- Facebook button -->
<fb:login-button scope="public_profile,email" onlogin="fb_login();">
</fb:login-button>

Answer 7

window.fbAsyncInit = function () {
FB.init({
appId: 'Your-appId',
cookie: false, // enable cookies to allow the server to access
// the session
xfbml: true, // parse social plugins on this page
version: 'v2.0' // use version 2.0
});
};
// Load the SDK asynchronously
(function (d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
function fb_login() {
FB.login(function (response) {
if (response.authResponse) {
console.log('Welcome! Fetching your information.... ');
//console.log(response); // dump complete info
access_token = response.authResponse.accessToken; //get access token
user_id = response.authResponse.userID; //get FB UID
FB.api('/me', function (response) {
var email = response.email;
var name = response.name;
window.location = 'http://localhost:12962/Account/FacebookLogin/' + email + '/' + name;
// used in my mvc3 controller for //AuthenticationFormsAuthentication.SetAuthCookie(email, true);
});
} else {
//user hit cancel button
console.log('User cancelled login or did not fully authorize.');
}
}, {
scope: 'email'
});
}
<!-- custom image -->
<img src="/Public/assets/images/facebook/facebook_connect_button.png" />
<!-- Facebook button -->
<fb:login-button scope="public_profile,email" onlogin="fb_login();">
</fb:login-button>