Http Interceptor for Angular JS

httpInterceptor

angular.module('model').factory('httpMiddletier',
  function ($q, $rootScope) {
    return {
      request: function (config) {
        $rootScope.loading = true;
        return config || $q.when(config);
      },

      requestError: function (rejection) {
        $rootScope.loading = false;
        return $q.reject(rejection);
      },

      response: function (response) {
        $rootScope.loading = false;
        return response || $q.when(response);
      },

      responseError: function (rejection) {
        $rootScope.loading = false;
        return $q.reject(rejection);
      }
    };
  });