ASP MVC Angular JS $http not found - angularjs

Question

I have a problem with calling http get to WebApi controller from my angular code. I am using ASP MVC just to provide start page and the start page url looks like: http://localhost:23845/StudentsEditor/StudentsView and now from angular I am callinh http request:
angular.element(document).ready(function () {
$http({
method: "GET",
url: "api/Groups/GetGroups",
dataType: "json",
}).then(function successCallback(response) {
$scope.groups = response.data;
}, function errorCallback(response) {
alert("trouble...");
});
and I am getting 404 because the URL is incorrect. It concats the path and it loks like:
GET http://localhost:23845/StudentsEditor/api/Groups/GetGroups
instead of http://localhost:23845/api/Groups/GetGroups
plese give me some advice hoe to resolve it. Of course I have defined RouteConfig:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
name: "Default",
url: "{controller}/{action}/{id}",
defaults: new { controller = "StudentsEditor", action = "StudentsView", id = UrlParameter.Optional }
);
and the webApi config:
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "{url}/api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
var json = config.Formatters.JsonFormatter;
json.SerializerSettings.PreserveReferencesHandling = Newtonsoft.Json.PreserveReferencesHandling.Objects;
config.Formatters.Remove(config.Formatters.XmlFormatter);

Answer 1

You should not hard code url's like that. You may use the Url.Content or Url.RouteUrl helper methods in your razor view to generate the relative url to the app base/root. It will take care of correctly building the url regardless of your current page/path. Once you get this value, You can use angular's value provider to pass this data from your razor view to your angular controller/ angular data services.
So in your razor view (Specific page/ Layout file), You may add this.
<script>
var myApp = myApp || {};
myApp.Urls = myApp.Urls || {};
myApp.Urls.baseUrl = '#Url.Content("~")';
</script>
<script src="~/Scripts/AngularControllerForPage.js"></script>
<script>
var a = angular.module("app").value("appSettings", myApp);
</script>
and in your angular controller, the appSettings will be injected and you can use that and build the correct url to your other web api end points.
var app = angular.module("app", []);
var ctrl = function (appSettings,$http) {
var vm = this;
vm.baseUrl = appSettings.Urls.baseUrl;
//build other urls using the base url now
var getUGroupsUrl = vm.baseUrl + "api/Groups/GetGroups";
// you can use getUGroupsUrl now for your http calls.
console.log(getUGroupsUrl);
$http.get(getUGroupsUrl).then(function(response) {
console.log(response.data);
}
};
ctrl.inject=['$http'];
app.controller("ctrl", ctrl)
You may also consider moving your web api calls from your angular controller to a data service to keep things clean & keep concern separated.

Answer 2

I found easy way to accomplish what I was looking for:
angular.element(document).ready(function () {
$http({
method: "GET",
url: window.location.origin + '/api/Groups/GetGroups',
dataType: "json",
}).then(function successCallback(response) {
$scope.groups = response.data;
}, function errorCallback(response) {
alert("trouble..");
});
});
and the key is window.location.origin which returns protocol + host + port