Facebook not allowing subdomain login approval

I used to have this working and I do have it working for all other social logins.

I have a site that makes use of GTranslate and all subdomains refer to foreign languages. For example, my main English site is at drinkedin.net and Spanish would be at es.drinkedin.net

I have a wildcard SSL certificate, so that's all covered.

GTranslate handles the subdomains and translates the content on the fly via reverse proxies.

What I do is the following. For example, in \components\com_jfbconnect\libraries\provider\facebook.php, I edit the following:

// Check that additional scope for a user exists. If not, reroute them through Facebook login to obtain it
public function fetchNewScope($newScope)
{
$params = array();
$params = implode(',', $newScope);
if(isset($_SERVER))
$returnBase = "http://" . $_SERVER . ".drinkedin.net/";
else
$returnBase = "drinkedin.net/";
$params = $returnBase . 'index.php?option=com_jfbconnect&task=authenticate.callback&provider=facebook';
$redirect = $this->client->getLoginUrl($params);
JFactory::getApplication()->redirect($redirect);
}

Notice how the redirect_uri preserves the subdomain. In the facebook.php file, I patch this in 3 places. In twitter.php and oauth2.php, I patch it each in one place.

All non-Facebook social logins (using either Twitter or Oauth2) work just fine. In the case with Facebook, I get the error message "We were unable to get information Facebook account. Please try again." for all foreign language subdomains (although English works just fine).

Regarding FB app permissions, I've added all subdomains to the "App Domains" portion of the FB App Settings.

Why won't this work?

Suggestions?

Setting Debug On (I tried both Logging and On) did nothing. Not sure why not.

I did step #15 of the instructions now. I didn't do it before for main domain (i.e. drinkedin.net) - and everything works fine there. Now I've added all potential subdomains and also SSL versions. I saved the updated FB app. Does it take time for the settings to propagate? It didn't help as I still get the "We were unable to get information Facebook account. Please try again." error message.

What else would you suggest?

I've found something weird in that it does allow login via foreign language domain on seemingly random occasions (much less than half the time, but if I sometimes retry - it works). Could that behavior tell you something about this problem?

Additionally - if I set the following FB settings, it seems to work much more consistently (almost all the time):

Auto Login - OFF

Show Login Credentials in Popup - ON

Show Logging In Message - ON

Log Out of Joomla Only - ON

I'm not sure I really want the 2nd and 3rd options, but it seems to work then. What is loaded/checked/etc that is different if I set it differently?

It works now 100% (seems like all the time) of the time when "Show Login Credentials in Popup" is Enabled.

My problem is if it's not enabled. As you said, the login is very different.

You wrote:

alzander wrote: es.drinkedin.net/index.php?option=com_jf...782392312cdd86d0cf=1

and I notice that this has more parameters than what I setup in the FB app's return URI settings. The extra part

alzander wrote: &return=Lw==&37761a95df6ea3782392312cdd86d0cf=1

is not familiar - is that a token? Is that going to mess up FB's acceptance?

I don't mind the popup - but if you see screencast.com/t/AE2XXmr1ko - you'll see that this popup box is far too large. Where can I adjust the size of this box (autologin)? It doesn't stay on the screen long enough to debug and capture the CSS classes, etc. If I can style this popup better, I'll keep it.