Facebook connect works fine but troubles inside Facebook iframe - facebook

Question

I actually tried to find a solution but nothing and I hope I will find a solution here !
I use facebook connect in my website, everything works fine
when I am logged on facebook, I am automatically logged into my site through facebook connect, and vice versa.
Now i tried to make it a facebook application but I have the following problem:
I try to run inside the facebook iframe but unfortunately I'm not automatically logged in. sometimes it works, sometimes nothing happens , Sometimes I get this message: (Could not get the Facebook session. Your server may not Be Able Securely Facebook to connect to the user to retrieve information.)
some code im using :
include 'includes/facebook.php';
$facebook = new Facebook(array(
'appId' => $setting['facebook_appid'],
'secret' => $setting['facebook_secret'],
'cookie' => true, // enable optional cookie support
));
if ($facebook->getUser()) {
$facebook_session = 1;
try {
$fb_user = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
}
function get_facebook_cookie($app_id, $application_secret) {
$args = array();
parse_str(trim($_COOKIE['fbs_' . $app_id], '\\"'), $args);
ksort($args);
$payload = '';
foreach ($args as $key => $value) {
if ($key != 'sig') {
$payload .= $key . '=' . $value;
}
}
if (md5($payload . $application_secret) != $args['sig']) {
return null;
}
return $args;
}
$cookie = get_facebook_cookie($setting['facebook_appid'], $setting['facebook_secret']);
$open = #file_get_contents('https://graph.facebook.com/me?access_token='.$cookie['access_token']);
if ($open != FALSE) {
$fbdata = json_decode($open);
$fb_user = array();
foreach($fbdata as $key => $fbdata2) {
$fb_user[$key] = $fbdata2;
}
}
}
else {
$facebook_session = 0;
}
ps: im using of course a Secure Canvas URL
Please help !
Thanks in advance

Answer 1

My Facebook Connect login worked fine, but not inside the Facebook Canvas/iFrame it didn't work at all. I had to change my login method (now that facebook users have to be able to autologin in your application) and what basically worked for me was this: How to authorize Facebook app using redirect in canvas?
This is what I had before (I use CakePHP):
$params = array(
'scope' => 'email'
);
$loginUrl = $facebook->getLoginUrl($params);
$this->redirect($loginUrl);
And I changed it to this which worked quite well:
$loginUrl = $facebook->getLoginUrl(
array(
'canvas' => 1,
'fbconnect' => 0,
'req_perms' => 'publish_stream'
)
);
echo '<script>top.location="'.$loginUrl.'";</script>';
I'm not sure if that really helps you as your app seems a bit more complicated than mine, but maybe you can solve your issue with this answer or the post I linked to.