CakePHP的和Facebook与安全组件开启(CakePHP and Facebook with

我想安全组件开启。

但是当你加载Facebook标签内CakePHP的应用程序，FB是$ _REQUEST [“signed_request”]我的形式 - 与此问题是，安全组件“做出反应”这个“后”，给我验证错误，黑色 - 孔等

我怎么去解决这个？

我找不到文档上的任何东西去解决这个问题。

我想要的是莫名其妙地“手动”运行安全组件，以便它唯一的“反应”当我真正提交我的形式，而不是当Facebook帖子的$ _REQUEST [“signed_request”]我的形式。

更新：

<?php
App::uses('CakeEmail', 'Network/Email');

class PagesController extends AppController {
    public $helpers = array('Html','Form');
    public $components = array('RequestHandler');

    public function beforeFilter() {
        parent::beforeFilter();
        $this->Auth->allow('*');

         $this->Security->validatePost = true;
         $this->Security->csrfCheck = true;
         $this->Security->unlockedFields[] = 'signed_request';
    }

    public function home() {
        $this->loadModel('Memberx');
                if($this->request->is('post') && isset($this->request->data['Memberx']['name'])) {
                 //...save here, etc. ...
                }
    }

FYI：我得到一个“黑洞”的错误。

最后更新（@ tigrang的回答后）：

public function beforeFilter() {
    parent::beforeFilter();
    $this->Auth->allow('*');

    $this->set('hasLiked', false);

    if(isset($this->request->data['signed_request'])){
        $this->set('hasLiked', $this->hasLiked($this->request->data['signed_request']));
    } 

    if(isset($this->request->data['Memberx']['signed_request'])) {
        $this->set('hasLiked', $this->hasLiked($this->request->data['Memberx']['signed_request']));  
    }

    /* 
    To go around Facebook's post $_REQUEST['signed_request'],
    we unset the $_REQUEST['signed_request'] and disable the csrfCheck
    ONLY after we have set the hasLiked view variable
    */
    unset($this->request->data['signed_request']);
    if (empty($this->request->data)) {
       $this->Security->csrfCheck = false;
    }        
}

于是，我像做以下我的看法：

<?php
if($hasLiked) {
?>
    You have liked this page!
<?php
}
?>

public function beforeFilter() {
    parent::beforeFilter();
    $this->Auth->allow('*');
    $this->_validateFbRequest();
}

protected function _valdiateFbRequest() {
   if (!isset($this->request->data['signed_request'])) {
       // not a valid request from fb
       // throw exception or handle however you want
       return;
   }
   $signedRequest = $this->request->data['signed_request'];
   unset($this->request->data['signed_request']);
   if (empty($this->request->data)) {
       $this->Security->csrfCheck = false;
   }
   // validate the request
}