Question

I need to get the User ID of a user hitting a Facebook iFrame application. While sifting through all of the bogus and outdated information, I think I’ve come across the correct info.

When the user hits the page, I need to have them authorize the app. In my PHP I do this:

$facebook = new Facebook($appData);
$user = $facebook->getUser();

if(!$user) {
    echo '<script>top.location.href="'.$facebook->getLoginUrl().'";</script>';
    die();
}

This gives me the authorization request, but then pushes me back to my server, not the iFrame App’s URL (http://app.facebook.com/blah). I manually constructed the URL and tried to set the URL to the app.facebook.com URI but then it I get an error saying the URL is not valid for the app.

How do you get it to redirect back to the app after authorization? This app will live inside Facebook, not be generally accessible outside, so I’m not looking for Facebook Connect login.

Edit

This is the exact error I get when I fiddle with the request_uri:

API Error Code: 191
API Error Description: The specified URL is not owned by the application
Error Message: Invalid redirect_uri: Given URL is not allowed by the Application configuration.

Answer 1

Have you tried setting the redirect_uri parameter.

if(!$user) {
  $params = array('redirect_uri' => 'http://app.facebook.com/blah/');
  die('<script>top.location.href="'.$facebook->getLoginUrl($params).'";</script>');
}