Angular 2 authentication using cookies [duplicate] - asp.net-mvc

Question

I'm having trouble moving my Angular 1 JavaScript service to a Angular 2 TypeScript service using http to make a CORS request (this is using Ionic version 2). In Angular 1, I do something like this.
angular.module('app.services',[])
.factory('LoginService', ['$http', function($http) {
var service = {};
service.isUserLoggedIn = function() {
var restUrl = 'http://10.10.10.25:8080/api/user/isloggedin';
var options = {
method: 'GET', url: restUrl, withCredentials: true,
headers: {
'x-request-with': 'XMLHttpRequest',
'x-access-token': 'sometoken'
}
};
return $http(options);
};
return service;
}])
In Angular 2 using TypeScript, a lot has changed (Promises/Observables). My attempt so far looks like the following.
import { Injectable } from '#angular/core';
import { Headers, Http, Response, RequestMethod, RequestOptionsArgs } from '#angular/http';
import { Observable } from 'rxjs/Observable';
#Injectable()
export class LoginService {
constructor(private _http:Http) {
}
isLoggedIn():boolean {
var r:any;
var e:any;
let url = 'http://10.10.10.25:8080/api/user/isloggedin';
let options:RequestOptionsArgs = {
url: url,
method: RequestMethod.Get,
search: null,
headers: new Headers({
'Content-Type': 'application/json',
'X-Requested-With': 'XMLHttpRequest',
'x-access-token' : 'sometoken'
}),
body: null
};
this._http.get(url, options).map(this.extractData).catch(this.handleError)
.subscribe(
response => { r = <any>response; console.log(r); },
error => { e = <any>error; console.log(e); });
return false;
}
private extractData(response:Response) {
let body = response.json();
return body.data || { };
}
private handleError(error:any) {
let errMsg = (error.message) ? error.message :
error.status ? `${error.status} - ${error.statusText}` : 'Server error';
console.log('error = ' + errMsg);
return Observable.throw(errMsg);
}
}
I am no longer sure how to address in Angular 2 what I had in Angular 1
withCredentials (note that https://angular.io/docs/js/latest/api/http/index/RequestOptionsArgs-interface.html#!#withCredentials-anchor says the RequestOptionsArgs should have a field withCredentials but I get an error in the IDE Visual Studio Code saying that it does not exists in the interface; ionic is probably using an older angular 2 version?)
headers (x-request-with and x-access-token)
the actual response
I did a little bit more searching, and I was able to understand how to insert headers and properly handle the subscription. However, the withCredentials is still a problem.
I found this SO post angular2 xhrfields withcredentials true and modified my constructor as follows. It works now.
constructor(#Inject(Http) private _http:Http) {
let _build = (<any> _http)._backend._browserXHR.build;
(<any> _http)._backend._browserXHR.build = () => {
let _xhr = _build();
_xhr.withCredentails = true;
return _xhr;
}
}

Answer 1

The support of withCredentails will be present in the RC2 version of Angular2 that will be released soon. It's not part of the RC1 version... You need to wait a bit.
With RC2, you will be able to use this property directly in the request options:
this.get('...', { withCredentials: true })
See this question for more details:
Angular 2 - http get withCredentials