transform.js

    $http.defaults.headers.post["Content-Type"] = "application/x-www-form-urlencoded";
    $http.defaults.transformRequest.unshift(function (data, headersGetter) {
      var key, result = [];
      for (key in data) {
        if (data.hasOwnProperty(key)) {
          result.push(encodeURIComponent(key) + "=" + encodeURIComponent(data[key]));
        }
      }
      return result.join("&");
    });