Question

I am trying to integrate Facebook into a web app that I am working on. I got an api key and secret key from Facebook, and have set the Site Url to http://www.mysite.com/something/app/

The following code is used from http://www.mysite.com/something/app/signup/xxxx/ to detect whether the user is connected or not:

        $facebook = new Facebook(array(
          'appId'  => FB_APIKEY,
          'secret' => FB_SECRETKEY,
          'cookie' => true  
        ));

        $session = $facebook->getUser();

        if($session) {
            # Active session, let's try getting the user id (getUser()) and user info (api->('/me'))
            try{
                $uid = $facebook->getUser();
                $user = $facebook->api('/me');
            } catch (Exception $e){}

            if(!empty($user)){
                # User info ok? Let's print it (Here we will be adding the login and registering routines)
                echo $user;
            } else {
                # For testing purposes, if there was an error, let's kill the script
                die("There was an error.");
            }
        } else {
            # There's no active session, let's generate one
            $login_url = $facebook->getLoginUrl();
            header("Location: ".$login_url);
        }

But the problem is, when the user is redirected to $login_url, it keeps redirecting back, creating an infinite loop.

The redirect url is: https://www.facebook.com/connect/uiserver.php?app_id=xxxxxxxxxxx&method=permissions.request&display=page&next=http%3A%2F%2Fwww.something.com%2Fsomething%2Fapp%2Fsignup%2Fxxxxx%2F&response_type=code&state=6f51768c22974a16b5dcf4d8dc7f46df&fbconnect=1

I have looked at other similar issues on SO, and also on Google and have tried their solutions but it just didn’t help me out.

[UPDATE]

Ok I think I am onto something. If I log in as a different Facebook user, I am not being redirected in a loop. It seems to happen only when I use my own Facebook account, which is the admin of the app. But after the redirect it should return getUser() right.. but it doesn’t for some reason.

Any ideas? Thanks.

Answer 1

I started from scratch on a new .php file from the root of my server. There everything was working alright, so I found out that my own code was causing the webpage to redirect.

In fact, it was the mod_rewrite in my .htaccess file that as messing things up. Somehow it is not picking up the GET variables set by FB. So I need to figure out something for it. But at least I now know what caused the problem. Case closed!