cakephp ajax请求中的Cookie问题？

I am implementing Ajax login using auth component in my cakephp app. Everything is working fine except remember me.

I am trying to set cookie using Cookie component but seems it's not sending cookie with response.

I have tried other setting domain, path and user agent check false in session variable but it didn't work.

If I use setcookie method then it's sending cookie in response (but I need cakephp cookie as I am saving array in cookie)

Below is code that I am using:

public function beforeFilter() {
    parent::beforeFilter();

    $this->Cookie->path = '/';
    $this->Cookie->httpOnly = true;


    if (!$this->Auth->loggedIn() && $this->Cookie->read('rememberMe')) {

        $cookie = $this->Cookie->read('rememberMe');

        $user = $this->User->find('first', array(
            'conditions' => array(
                'User.username' => $cookie['username'],
                'User.password' => $cookie['password']
            )
        ));

        if ($user && !$this->Auth->login($user['User'])) {
            $this->redirect(array('action' => 'logout')); // destroy session &   cookie
        } else {
            $this->redirect($this->Auth->redirectUrl()); // redirect to Auth.redirect if it is set, else to Auth.loginRedirect ('/users/userhome') if it is set, else to /
        }
    }
}

Here is login function code:

if ($this->Auth->login()) {
    Croogo::dispatchEvent('Controller.Users.loginSuccessful', $this);
    if ($this->request->data['User']['remember_me'] == 1) {
        $cookieTime = "2 months"; // You can do e.g: 1 week, 17 weeks, 14 days
        // remove "remember me checkbox"
        unset($this->request->data['User']['remember_me']);
        // hash the user's password
        $this->request->data['User']['password'] = $this->Auth->password($this->request->data['User']['password']);
        // write the cookie
        $this->Cookie->write('rememberMe', $this->request->data['User'], true, $cookieTime);

    }
    $response['status'] = 'success';
    $response['redirect_url'] = Router::url(array('action' => 'dashboard'), true);
    $response['action'] = 'login';
    $response['message'] = __d('sharbook', 'You have logged in successfully. Please stand by...');
    echo json_encode($response);
}

Please help me to fix issue.

First thing, you should enabled debug mode in your application (Configure::write('debug', 2)), or check the debug logs, then you'd see that you are getting a "Cannot modify header information - headers already sent" warning.

Do not manually output data using echo or the like

Except for session cookies which are being sent immediately when a session is started, normal cookies are queued in the CakeResponse object ($this->response in your controller) until after the controller action has been executed, so doing an echo in your controller action will cause headers and data to be sent, and therefore the cookie headers cannot be sent anymore.

Use a view or the CakeResponse object instead

Simple fix, either use the JSON view functionality (recommended)

class YourController extends AppController {
    public $components = array('RequestHandler');

    // ...

    public function login() {
        // ...

        if ($this->Auth->login()) {
            // ...

            $response['status'] = 'success';
            $response['redirect_url'] = Router::url(array('action' => 'dashboard'), true);
            $response['action'] = 'login';
            $response['message'] = __d('sharbook', 'You have logged in successfully. Please stand by...');

            $this->set('response', $response);
            $this->set('_serialize', array('response'));
        }
    }
}

or properly set the response body on the response object

$this->response->body(json_encode($response));
$this->response->type('json');

so that the data is being sent by CakeResponse::send() (which will properly send the cookie headers first) after the action has been dispatched.