There are cases that you want to make an ajax request to another server and get the results.

but Browsers apply the same-origin policy and not allow you to do that http://en.wikipedia.org/wiki/Same-origin_policy

However there is a way to do that through our server using JSONP http://en.wikipedia.org/wiki/JSONP

we will use the EHttpClient extension to make requests from our server to another one, so add this extension http://www.yiiframework.com/extension/ehttpclient/

In your controller

public function actionJSONP($url=null) {
	if ($url === null)
		throw new CHttpException(403, 'Invalid request');

	if (Yii::app()->request->isPostRequest) {
		echo $this->callHttpClient($url, $_POST, 'POST');
	} else {
		echo $this->callHttpClient($url, array(), 'GET');
	}

	Yii::app()->end();
}

public function callHttpClient($exUri, $params = array(), $methodRequest = 'GET') {
        Yii::import('ext.EHttpClient.*'); //if you not add it in your config/main.php
       
        $client = new EHttpClient($exUri, array());

        if ($methodRequest === 'GET') {
            $client->setParameterGet($params);
            $response = $client->request('GET');
        } else {
            $client->setParameterPost($params);
            $response = $client->request('POST');
        }

        if ($response->isSuccessful())
            return $response->getBody();
        else
            return null;
    }

In your view

<div id='div-1'>waiting for ajax response...</div>
 
 <script> 
 $.ajax({
  url: 'http://www/yourdomain.com/index.php?r=site/JSONP&url=http://www.anotherserver.com',
  type: 'POST',
  data: {"data_to_another_server1":'value1',"data_to_another_server2":'value2'},
  success: function(data) {
    $('#div-1').html(data);
  },
  error: function(e) {
    console.log(e.message);
  }
}); 
</script> 

Thats it!