AgileToolkit OAuth add-on error 500 at facebook's mobile site -

i using oauth facebook controller add-on atk4.

• it works expected when authenticating facebook regular desktop browser.
• it works when authenticating using mobile browser telling face book it's desktop browser.
• it not work when facebook detects mobile browser , redirects m.facebook.com/dialog/oath.

what's more, works fine signups mobile browsers (ie, when facebook asks user give permission app).

the login flow stops error 500 at: https://m.facebook.com/dialog/oauth?redirect_uri={my_url_encoded_landing_page_where_the_oauth_controller_lives}&scope=email&client_id={fb_app_id}

what hell going on here? there isn't difference between facebook mobile service , regular 1 addon isn't taking care of, or there?

it must i'm doing wrong. in init() on page handles fb, doing following:

function init(){     parent::init();     $f = $this->add("oauth/controller_oauth_facebook", array('sign_method'=>'plaintext'));      if ($fbtoken = $f->check()) {         $f->setsignatureinfo();          $f->setauthtoken($fbtoken["access_token"], $fbtoken["expires"]);           $s = $this->add("sni/controller_sni_facebook");          $s->setoauth($f);         // ...          // grab profile sni, database lookup, session stuff, etc         // ...     } } 

i've tried 3 sign_methods, , tried leaving alone, doesn't make difference because user not making controller access token use anyway.

i tried creating new app facebook , same issues vanilla configuration on that. i've marked , specified "website facebook login" site url integration.

the image below captured chrome after overriding user agent mobile device trigger forward facebook's mobile servers: screen shot of request

facebook closed bug report them stating it's not issue since no 1 else reporting bug. removing atk4 tag, same issue using example php code provided facebook on git.

created dedicated example here: http://demo.ambienttech.lv/d.html?ns=d3

example downloadable , includes instructions of setting facebook app well. see if helps.

---

try this:

<?php class page_fb extends page {     function init(){         parent::init();             $f = $this->add("oauth/controller_oauth_facebook");         $fbtoken = $this->api->recall("fbtoken");         if ($m = $_get["error_msg"]){             $v=$this->add("view_error");             $v->add("text")->sethtml("you can't connect application.");             $v->add("button")->sethtml("try again")->js("click", $this->js()->univ()->location("fb"));             return;         }         if (!$fbtoken){             if ($fbtoken = $f->check("email")){                 $this->api->memorize("fbtoken", $fbtoken);                 $this->api->redirect($this->api->url("/index"));             }         } else {              $f->setsignatureinfo();             $f->setauthtoken($fbtoken["access_token"], $fbtoken["expires"]);              $c = $this->add("sni/controller_sni_facebook");             $c->setoauth($f);              if (!$this->api->recall("fbuserinfo")){                 $this->api->memorize("fbuserinfo", $c->getuserprofile());             }             $info = $this->api->recall("fbuserinfo");             $username = $info->username;             $img = $c->customrequest("/" . $username . "/picture?type=large");             $this->api->memorize("userimg", $img);             $this->api->memorize("userinfo", $info);                          if (!$this->api->auth->isloggedin()){                 $this->api->auth->login($info->email);             }             $this->api->redirect($this->api->url("/index"));         }     } }