Laravel angularjs Request::ajax() always false

I'm building application with angularjs and laravel 4. Everything is fine but I need now to allow only XHR requests.

This is what I have at the beginning of my controller. But this statement is always false.

    if (!\Request::ajax())
    {
        return Response::json(array('halt'=>Request::ajax()));
    };

In angular I'm using standard $http service.

angular.module('APP')
.factory("API", ($http,$q,appClient,apiURL) ->
 class FB
  constructor:->
    this.deferredData = $q.defer();
  info: (reload)->
    $http(
      method: "get"
      url: apiURL+'game/'+appClient+"/info"
    ).success((res)->
      dostuff()
    )