user.service.ts

import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';

@Injectable()
export class UserService {

  constructor(private http: Http) { }

  getOne(userId: number) {
    return this.http.get(`/users/${userId}`).map(result => result.json());
  }

  getAll() {
    return this.http.get(`/users`).map(result => result.json());
  }

}