What is the correct way to share the result of an Angular Http network call in RxJs 5?

Question

By using Http, we call a method that does a network call and returns an http observable:

getCustomer() {
    return          


        

Answer 1

Have you tried running the code you already have?

Because you are constructing the Observable from the promise resulting from getJSON(), the network request is made before anyone subscribes. And the resulting promise is shared by all subscribers.

var promise = jQuery.getJSON(requestUrl); // network call is executed now
var o = Rx.Observable.fromPromise(promise); // just wraps it in an observable
o.subscribe(...); // does not trigger network call
o.subscribe(...); // does not trigger network call
// ...