[英]Infinite polling with Angular 4 and Http observables
I'm trying to build an infinite polling in my Http service because I'm building a king of of dashborad who survey data's comming from a servor, here's my code who's almost working (in my console I see the Json comming but it doesn't reflect to my view...I would like to inject in my users: Observable 我正在尝试在我的Http服务中构建一个无限轮询,因为我正在建立一个dashborad之王来调查来自服务器的数据,这里是我的代码几乎正在工作(在我的控制台中,我看到Json正在进行,但它没有'反思我的看法...我想注入我的用户:可观察
const usersURL = 'http://my.super.servor.php'
@Injectable()
export class UserService {
users: Observable<User[]>
constructor (public http:Http) {
this.users = http.get(usersURL)
genre mobile ou autre
.map(res => [res.json()]);
let i = this.users.subscribe(
usersURL => console.log(usersURL),
() => {}, // Here we catch up errors
() => console.log("completed!") // Here we catch up if its completed
)
// Here's where I'm trying to do the polling every 5 secondes
let tick$ = Observable.interval(5000);
let response$ =
tick$
.flatMap(() => http.get(usersURL))
.map(res => [res.json()]);
let stockPoller = response$.subscribe(res => console.log(res));
}
您只需将您的polling observable分配给this.users
:
this.users = tick$.flatMap(() => http.get(usersURL)).map(res => [res.json()]);
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