如何处理AngularJS中的工厂服务错误

Factory code

app.factory('abcFactory', function ($http, Config, $log) {
    var serviceURL = Config.baseURL + '/results';
    return{
        results:function() {
            var promise = $http({
                method: 'GET',
                url: serviceURL,
                timeout: Config.httpTimeout
            }).then(function(response) {
                    return response;  

                },  function(reason) {
                    $log.error("Request Failed: ", reason)
                });

            return promise;
        }
    }
});
app.factory('abcFactory', functi