create a synchronous http.get()

Question

Im trying to handle a login via promises and http.get but i fail so hard I get following error :

Object doesn\'t support property or method \'toPromis

Answer 1

I wonder if you actually use promise since the HTTP support of Angular relies on Observables.

To get the response, you simply need to return the observable for your call:

getSomething() {
  return this.http.get('http://localhost:5000/login/', {
    headers: authHeader
  }).map((response) => {
    return response.json()
  })
}

When calling the method, you can then register callbacks using the subscribe method:

getSomething().subscribe(
  data => handleData(data),
  err => reject(err));

If you really want to use promises (with the toPromise method), you should import this:

import 'rxjs/Rx';

See this issue for more details: https://github.com/angular/angular/issues/5632#issuecomment-167026172.

Otherwise, FYI calls aren't synchronous regarding HTTP in browsers...

Hope it helps you, Thierry