Question

I am using fb login connect in my demo site :
I used this code:

  window.fbAsyncInit = function() {
      try{
        FB.init({
            apiKey: '<MY APP KEY>',
            channelUrl : 'www.google.com'
        });

        FB.getLoginStatus(function(response){
            loginHandler(); 
        });
      }catch(error){}
  };  
    function loginHandler(success,fail)
    {

        try{
            if(success){
                alert('i am if');
                FB.api('/me', function(response,fail) {
                    alert("first name == " + response.first_name + "\n ln === " + response.last_name);
                });
            }
        }catch(error){}
    }

    $('#login').bind('click', function(response) {
        try{
            FB.login(loginHandler, {scope: 'email,user_likes'});
        }catch(error){}
    });

    $('#logout').bind('click', function() {
        try{
            FB.logout(function(response){});
        }catch(error){}
      });

Now my problem is that alert(‘i am if’); is showing every time whether I passed correct credentials to facebook or not and alert(“first name == ” + response.first_name + “\n ln === ” + response.last_name); shows undefined when user passes wrong credentials and shows correct info when user comes back passing correct info.

one possible option is to check like if(response.first_name!=undefined){blah blah....} but is it correct method of checking the authentication?

Please shed some light….

Answer 1

Try something like this:

//for login
    $("#login").bind("click", function(e) {     
        var fbScope = "email,user_likes";
        FB.login(function(response) {          
           if(response.status == "connected"){
               console.log("Logged in");
           }
        },{scope: fbScope});
    });
    //for checking logged in status
    FB.getLoginStatus(function(response){
        if (response.authResponse) {    
            var accessToken = response.authResponse.accessToken;
            FB.api('/me', function(response) {
                console.log('I m still loggedin');
            });         
        }
    });
    //for logout
    $("#logout").live("click", function(e) {        
        FB.getLoginStatus(function(response){           
            if(response.status == "connected"){
                FB.logout(function(response) {
                    console.log("I m logged out now");                  
                });
           } else {
                console.log("Not Logged logged in");
           }
        });
    });