Codeigniter，Facebook javascript SDK，PHP SDK在Facebook登录后重定向直到刷新后才getUser()

过程如下.

1. User clicks Facebook Login button
2. User signs in and grants perms
3. Facebook redirects uses FB.Event.subscribe auth.login to redirect my login controller
4. My login controller loads the fbconnect module and chains the method Connect()
5. Connect() Checks if there is a facebook user using getUser() and if true checks if they are an existing user to log them in or returns false if no facebook user was found.

一切正常，唯一的问题是重定向到登录页面后，Connect在实际情况下应为False时返回False，因为fbuser已登录并已授予权限.如果我刷新但一切正常，则用户登录(如果存在)或将新用户发送到注册页面.下面是我的代码.

Everything works except the only problem is after being redirected to the login page Connect returns False when it should in fact be true sine the fbuser is logged in and has granted perms. If I refresh however everything works, the user is logged in if exists or if new is sent to the signup page. Below is my code..

      <div id="fb-root"></div>
    <script>
      //initializing API
      window.fbAsyncInit = function() {
        FB.init({appId: '(My app id)', status: true, cookie: true,
                 xfbml: true, // channel.html file
                 oauth  : true
                 });
                 FB.Event.subscribe('auth.login', function(response) {
                 window.location='http://www.(Mysite).com/login';
                 });
                 FB.Event.subscribe('auth.logout', function(response) {
                 window.location='http://www.(Mysite).com/logout';
                 });
                 };
      (function() {
        var e = document.createElement('script'); e.async = true;
        e.src = document.location.protocol +
          '//connect.facebook.net/en_US/all.js';
        document.getElementById('fb-root').appendChild(e);
      }());
    </script>

Fbconnect.php

Fbconnect.php

class Fbconnect extends MX_Controller {
public $fb_user = null;
public $fb_user_id = null;

// Initilize Fabebook
public function __construct() 
{   
    parent::__construct();
    $this->config->load("facebook");
    require 'facebook.php';

    $this->facebook = new Facebook(array(
      'appId' => $this->config->item('appId'),
      'secret' => $this->config->item('Secret')
    ));


    // Get user from FB
    $this->fb_user_id = $this->facebook->getUser();

    if ($this->fb_user_id):
      try {
        // Proceed knowing you have a logged in user who's authenticated.
        $this->fb_user = (object)$this->facebook->api('/me');
      } catch (FacebookApiException $e) {
        error_log($e);
        $this->fb_user = null;
      }
    endif;

}


public function connect(){

    // Check for FB object
    if($this->fb_user):
        // FB Object found
            // Check if user exists
            $this->load->model('facebook/m_facebook');
            $user = $this->m_facebook->getUser($this->fb_user->id);

            // If we find a user and fb connect is true
            if($user):
                // user found log them in
                if($this->ion_auth->login($user->username, $user->password, true, true)):
                   redirect('', 'refresh');
                endif;
            else:
            // There is a fb object & the user is not logged in & doesnt exist in db yet must be new 
                redirect('signup/facebook', 'refresh');
            endif;
    else: 
        // No FB user or user not logged in                                  
        return false;
    endif;    
}

身份验证/登录代码(仅涉及Facebook部分)

The auth/login code (just the part that involves facebook)

 $this->load->module('facebook/fbconnect')->connect();