Question

I have implemented a Facebook connect example with my Codeigniter website. I am trying to bring the Facebook connect code up to date but I cannot work out how to parse the fbsr_cookie which has replaced the fbs_cookie.

I have the following code –

function get_facebook_cookie() 
    {
        // get the fb app id, and secret from CI config source
        $CI =& get_instance();
        $app_id = $CI->config->item('facebook_app_id');
        $application_secret = $CI->config->item('facebook_app_secret');
        if(isset($_COOKIE['fbs_' . $app_id])){
            $args = array();
            parse_str(trim($_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;
        }
        else{
            return null;
        }
    }

and then to get the user’s Facebook id –

function getUser()
    {
        $cookie = $this->get_facebook_cookie();
        $user = @json_decode(file_get_contents( 'https://graph.facebook.com/me?access_token=' . $cookie['access_token']), true);
        return $user;
    }

Does anyone have an idea how I can change this to work with the fbsr_cookie?

Thanks.

Answer 1

The new cookie format with name fbsr_APPID is actually a signed_request which is quite easy to parse and documentation showing exactly how to do this (see “Verifying and Decoding” in signed_request Documentation