javascript - Facebook get access Token

Question

How to get a "access token" using Facebook Graph API. I have app ID, the username and password of the user. Just i need to get the access token so that i may be able to access news feed,.... and others.

Answer 1

Okay so you need to get the access_token of a user in JavaScript. Here you go:

1. Start reading the JavaScript SDK documentation

2. Something like the below will get you started:

   <div id="fb-root"></div>
   <script>
   window.fbAsyncInit = function() {
       FB.init({
           appId      : 'YOUR_APP_ID', // App ID
           channelUrl : '//WWW.YOUR_DOMAIN.COM/channel.html', // Channel File
           status     : true, // check login status
           cookie     : true, // enable cookies to allow the server to access the session
           xfbml      : true  // parse XFBML
       });
       // this shouldn't be called directly, but instead should be initiated with a user click event
       FB.login(function(response) {
           if (response.authResponse) {
               console.log('Access Token: ' + response.authResponse.accessToken);
           } else {
               console.log('User cancelled login or did not fully authorize.');
           }
       });
   
   };
   
   // Load the SDK Asynchronously
   (function(d){
       var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
       if (d.getElementById(id)) {return;}
       js = d.createElement('script'); js.id = id; js.async = true;
       js.src = "//connect.facebook.net/en_US/all.js";
       ref.parentNode.insertBefore(js, ref);
   }(document));
   </script>
   

3. As mentioned in the documentation:

   Calling FB.login results in the JS SDK attempting to open a popup window. As such, this method should only be called after a user click event, otherwise the popup window will be blocked by most browsers.

4. NEVER EVER ask for the user password nor give it to ANY application if it asks you! and if it does, report it to Facebook directly!

5. It's "JavaScript" not "Java Script" :-)