//CONTROLLER
var getSomeData = async function () {
    $timeout(function () {
        vm.isLoadingSomeData = true; //Flag for spinner in UI
    });
    try {
        var someDataLoadRequestResult = await dataService.getSomeData();
        //Handle result here
    } catch (error) {
        //Handle error here
    }
    $timeout(function () {
        vm.isLoadingSomeData = false;
    });
};

vm.getSomeData= getSomeData; //Triggers by ng-click in view

//Data load service/factory
(function () {

    "use strict";

    angular.module("dataService", []).factory("dataService", dataService);

    dataService.$inject = ["$http", "$httpParamSerializerJQLike"];

    function dataService($http, $httpParamSerializerJQLike) {

        var onSuccess = function (response) {
            return response.data;
        };

        var onError = function (response) {
            return response.status >= 400 ? response.data : response;
        };

        var getSomeData= function () {
            return $http({
                method: "get",
                url: "/YOUR_PATH",
                timeout: 1500,
                data: angular.toJson({}),
                headers: {
                }
            }).then(onSuccess, onError);
        };

        return {
            getSomeData: getSomeData,
        };
    };

})();