Question

I’m considering implementing Facebook’s comments plugin on my site. The problem is that I need to know the pages on my site where a user has commented.

I have read Facebook’s documentation but I don’t find a proper permission to know this.

Is it possible to know which URLs a user has commented? In such case which permissions does my app need?

Answer 1

I know you have already accepted an answer, but i think this will help you.

You can first generate the code for Facebook Comments here.

For each page that you implement the comments plugin in, you’ll be providing a href of the page the user is reading/visiting, as it is required by the plugin.

You can use the Javascript SDK to listen to Facebook events, for comments specifically you have the comment.create event, which is fired every time a comment is made. This event passes a response object to its callback function, which contains the href mentioned previously, and the commentID of the comment just generated. Hence you can easily track which page(url) a user has commented on.

Example (see how we can listen to the comment.create event):

<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
    });

    // Additional initialization code here, this is where we listen to events
    FB.Event.subscribe('comment.create',
      function(response) {
        alert('You commented on the URL: ' + response.href + 'CommentID: ' + response.commentID);
        // do an ajax call to server to store user,commentID,href info if you require
      }
    );
  };

  // 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>