feat(http): add support for withCredentials

Hey, I’m trying to figure out how to send cookies throught CORS but since I can’t access XMLHttpRequest objects directly I’m not able to set withCredentials option. I remember using it with $http in Angular 1.4. Maybe I could do this by writting custom XHRBackend? Or is there any easier way?

[icereval]

@brianaprince, here is a workaround I’ve been using for now…

@Injectable()
export class Auth {
  isAuthenticated = false;
  user: User;

  constructor(@Inject(Http) private http: Http) {
    // TODO: Use official Angular2 CORS support when merged (https://github.com/angular/angular/issues/4231).
    let _build = (<any> http)._backend._browserXHR.build;
    (<any> http)._backend._browserXHR.build = () => {
      let _xhr =  _build();
      _xhr.withCredentials = true;
      return _xhr;
    };
  }
...

[scottie]

just usless really… useless… well that was a fun Angular experiment back to reactJS…