Codeigniter、Facebook javascript SDK、PHP SDK 在 facebook 登录后重定向不会 getUser() 直到刷新

流程如下.

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，唯一的问题是在重定向到登录页面后，Connect 返回 False，而实际上它应该是 true，因为 fbuser 已登录并已授予权限.如果我刷新但一切正常，则用户将登录(如果存在)或新用户被发送到注册页面.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;    
}

认证/登录代码(只是涉及facebook的部分)

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

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