Why doesn't the cors filter work for me?

Question

Yii

How to properly write a cors filter for a controller.
Here is my example

public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'delete' => ['POST'],
                ],
            ],
            'corsFilter' => [
                'class' => Cors::className(),
                'cors' => [
                    'Origin' => ['http://localhost:3001/socket.io/1/?t=1503580684584'],
                    'Access-Control-Request-Method' => ['GET'],
                    'Access-Control-Allow-Credentials' => true,
                ]
            ],
];
}

I still get an error

GET localhost:3001/socket.io/1/?t=1503582467989 403 (Forbidden)
XMLHttpRequest cannot load localhost:3001/socket.io/1/?t=1503582467989. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin ' crm ' is therefore not allowed access. The response had HTTP status code 403.

How to write correctly so that everything works?

Answer 1

and on port 3001 exactly the web server with yii is spinning?