Facebook-connect gives a redirect loop

authentication, facebook, php

Solution

I had this problem, in my case I had to edit base_facebook.php from the SDK:

public static $CURL_OPTS = array(
    CURLOPT_CONNECTTIMEOUT => 10,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT        => 60,
    CURLOPT_USERAGENT      => 'facebook-php-3.2',
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => false,
);

The last two options I added manually.

Problem

Please, I need help. I'm dealing with this issue for 1 month!! I would like to implement facebook connect login to my website, using PHP and php-sdk 3.1.1. In few words, my code works offline (on localhost) but not online which results in "Too many redirect loop (on Chrome)": Error 310 (net::ERR_TOO_MANY_REDIRECTS): There were too many redirects. Here is my code: 1/ I load facebook connect SDK and init it: ``` require 'src/facebook.php'; $facebook = new Facebook(array( 'appId' => '209633612480053', 'secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxx' )); ``` Please, note that I created two apps on facebook-developper page, one for offline tests, and the other for online tests. And I'm sure to switch correctly betwwen the two pairs of appId/secret (online and offline) when testing. So it's not the problem of bad facebbok-connect init. 2/ I try to get user info: ``` $uid = $facebook->getUser(); if($uid) { /* * Get user information. */ $user = $facebook->api('me/'); print_r($user); // Display user info. } else { /* * Redirect to FB login URL to allow access. */ $loginURL = $facebook->getLoginURL(); echo '<script> top.location.href=\''.$loginURL.'\'</script>'; } ``` It's as simple as that: If user ic connected to facebook, so display it's information, else, redirect to facebook login page to allow access. IT WORKS PERFECTLY OFFLINE, but online, I get a chrome error: ``` This webpage has a redirect loop The webpage at https://www.facebook.com/dialog/oauth?client_id=209633612480053&redirect_uri=http%3A%2F%2Fwww.bluward.com%2Foauth%2Ffacebook&state=551f60cd4be6cd8ed1622f8168a5219a#_=_ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer. ``` Some additional information: Online, I use 1and1 host provider, and to be sure to have the same server configuration than offline server (which is a MAMP Pro), I uploaded the sams php.ini file. Please, if someone has an idea, or get a similar problem, I'll be glad to have help. Thank you in advance for all help. UPDATE: I updated my code to focus on the problematic line, so instead of redirecting to facebook login page, I display the redirect URL, so I just have to click to login: ``` $uid = $facebook->getUser(); if($uid) { /* * Get user information. */ $user = $facebook->api('me/'); print_r($user); // Display user info. } else { /* * Redirect to FB login URL to allow access. */ $loginURL = $facebook->getLoginURL(); echo $loginURL; // <-- HERE I CHANGED THE CODE TO DISPLAY LOGIN URL } ``` What I noticed is that facebook is infinitely redirecting to my script page. Only `code` parameter on URL bar changes. So, why facebbok is redirecting to my script page without giving me user info? Please, any idea?

Original source