问如何在AJAX中使用Zend Framework表单Hash (token)

EN

class AuthController extends Zend_Controller_Action
{
    public function init()
    {
        $contextSwitch = $this->_helper->getHelper('contextSwitch');
        $contextSwitch->addActionContext('index', 'json')
                      ->initContext();
    }

    public function loginAction()
    {
        $form = new Application_Form_Login();
        $request = $this->getRequest();

        if ($request->isPost()) {
            if ($form->isValid($request->getPost())) {
                // some code ..
            } else {
                // some code ..

                // Regenerate the hash and assign to the view
                $reservationForm->hash->initCsrfToken();
                $this->view->hash = $reservationForm->hash->getValue();
            }
        }
        $this->view->form = $form;
    }
}

<? $this->dojo()->enable()
                ->requireModule('dojox.json.query')
                ->onLoadCaptureStart() ?>
function() {
    var form = dojo.byId("login_form")
    dojo.connect(form, "onsubmit", function(event) {
        dojo.stopEvent(event);

        var xhrArgs = {
            form: this,
            handleAs: "json",
            load: function(data) {
                // assign the new hash to the field
                dojo.byId("hash").value = dojox.json.query("$.hash", data);

                // some code ..
            },
            error: function(error) {
                // some code ..
            }
        }
        var deferred = dojo.xhrPost(xhrArgs);
    });
}
<? $this->dojo()->onLoadCaptureEnd() ?>

//In the controller, after instantiating the empty form you add the Hash element to it:
$hash = new Zend_Form_Element_Hash('no_csrf_foo');
$hash_form->addElement('hash', 'no_csrf_foo', array('salt' => 'unique'));

 //...

//Also in the controller, within the condition "if ($request->isXmlHttpRequest())" you render the form (this will renew the session for the next attempt to send the form) and get the new id value:
$hash_form->render($this->view);
$hash_value['hash'] = $hash_form->getElement('no_csrf_foo')->getValue();//The value must be added to the ajax response in JSON, for example. One can use the methods Zend_Json::decode($response) and Zend_Json::encode($array) for conversions between PHP array and JSON.

//---------------------------------------

//In JavaScript, the Ajax response function:
document.getElementById("no_csrf_foo").value = data.hash;//Retrieves the hash value from the Json response and set it to the hash input.