How to synchronise Angular2 http get?

Question

I understand using observable I can execute a method when the request is completed, but how can i wait till a http get is completed and return the response using in ng2 http?

getAllUser(): Array<UserDTO> {
    this.value = new Array<UserDTO>();
    this.http.get("MY_URL")
                    .map(res => res.json())
                    .subscribe(
                        data => this.value = data,
                        err => console.log(err),
                        () => console.log("Completed")
    );

    return this.value;
} 

the "value" will is null when its returned because get is async..

Answer 1

By looking at the angular source (https://github.com/angular/angular/blob/master/packages/http/src/backends/xhr_backend.ts#L46), it is apparent that the async attribute of the XMLHttpRequest is not getting used. The third parameter of XMLHttpRequest needs to be set to "false" for synchronous requests.