Facebook Connect & HTTP Cookies - How Can I Overcome This "Race State"

Question

If you are interested in what the "Race Condition" is, then there is a flaw in the system, whereas it is highly dependent on time. See the wiki here for more information.

Therefore, the condition I am connected with Facebook Connect and the implementation of single sign-on service with the ASP.NET 4.0 web application (forms-based authentication - IIS7).

The process itself (including Logout) works well, but .....

Here's a scenario where it doesn't quite work 100%:

• The user is registered on Facebook.
• The user goes to my site.
• The user is not logged in automatically (should be, though).
• The user refreshes the page and automatically registers.

When I break the code in step 3 - Facebook cookies do not yet exist (in HttpContext.Current.Request.Cookies).

But when the page reloads (step 4) - there are Facebook Cookies there.

For me, this can be a few things:

I’m not sure that only in the case of Facebook, access to my cookie access application (delay in cross-domain handshakes - xd_receiver.htm) or a problem with cross-domain cookies themselves and the ASP.NET page life cycle has not yet been granted access.

Has anyone else dealt with this problem?

This is not all-all-and-all-all, but it is annoying (and not very different from the user's perspective).

EDIT:

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protected void Page_PreRender(object sender, EventArgs eventArgs)
{
   if (FacebookUser.IsAuthenticated) // static property, checks HttpContext.Request.Cookies
   {
        // log them into my website
   }
}

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2:

(run on window.load):

FB.init('myapikey', 'xd_receiver.htm', null);

- :

FB.init('myapikey', 'xd_receiver.htm', null);
FB.getLoginStatus(function(response) {
  if (!response.session) {
      return false;
  }
  else {
    window.location.reload();
  }
});

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window.onload = function() { 
                FB.init('{0}', 'xd_receiver.htm');
                FB.ensureInit(function() {
                   FB.Connect.ifUserConnected(onUserConnected, onUserNotConnected); 
                });
            };

            function onUserConnected() {
                alert('connected!');
                window.location.reload();
            }

            function onUserNotConnected() {
                alert('not connected');
            }

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Answer 1

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Answer 2

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Answer 3

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Nithin.

Answer 4

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FB.getLoginStatus(function(response) {
    if (response.session) {
       window.location.href = '/connect/cb/fb'; 
    }
    else{
       FB.login( function(resp){FBResponse(resp);},perms);
    }

});

var FBResponse = function(response,stop){ if (response.session){ window.location.href = '/connect/cb/fb'; } else{ if (stop) return; FB.init({appId:FBappId, status:true, cookie:true, xfbml:true}); FB.getLoginStatus(function(resp){FBResponse(resp,'stop');}); }; }