Repeat request (Angular2 - http.get) n seconds after finished

Question

I played around with angular2 and got stuck after a while.

Using http.get works fine for a single request, but I want to poll live-data every 4 seconds,

Answer 1

You can try using interval if that is more convenient. Calling subscribe gives you Subscription that lets you cancel the polling after sometime.

let observer = Observable.interval(1000 * 4);
let subscription = observer.subsscribe(x => {
    this._http.get(this._url)
     .share()
     .map(this.extractData)
     .catch(this.handleError)
});

....
// if you don't require to poll anymore..
subscription.unsubscribe();