从phonegap接收symfony2控制器中的数据

Question

我试图将phonegapp代码与我的symfony webservice连接起来。我通过ajax请求从phonegapp发送数据，但没有找到任何方法来从symfony2控制器接收数据。电话差距中的代码如下：

function login()
{
 var email = $("#userid").val();
 var pwd = $("#password").val();
 jQuery.ajax({
   type:'POST',
   url: 'http://external.apostle.digibiz.com/web/app_dev.php/api/ajax',
   data: {tag:'ULogin',u_email:email,password:pwd},
   success: function(response)
   {
      var jsObject = JSON.parse(response);
      alert(jsObject);
      if(jsObject==undefined)
      {
    alert('undefined');
      }
      else
      {
    var result = jsObject[0].success;
        if(jsObject[0].success == 1)
        { 
      alert('success');                         
    }
    else
    {
      alert('not varified');
    }               
      }
  }
});

}

the code in my symfony2 controller is written as :

public function ajaxAction(Request $request)
{
    $data = $request->request->get('tag');
    $encoders = array( new JsonEncoder());
    $normalizers = array(new GetSetMethodNormalizer());

    $serializer = new Serializer($normalizers, $encoders);

   // $jsonContent = $serializer->serialize("inserted successfully", 'json');

    $headers = array(
    'Content-Type' => 'application/json'

    );
    $response = new Response($data, 200, $headers);
    return $response; 
}

但是在任一部分执行时都没有收到请求或响应。还有其他方法可以连接吗？