Catching Rejections

To catch rejections we use the subscriber's error and complete callbacks.

  1. import { Http } from '@angular/http';
  2. import { Injectable } from '@angular/core';
  4. @Injectable()
  5. export class AuthService {
  7.   constructor(private http: Http) {}
  9.   login(username, password) {
  10.     const payload = {
  11.       username: username,
  12.       password: password
  13.     };
  15.     this.http.post(`${ BASE_URL }/auth/login`, payload)
  16.       .map(response => response.json())
  17.       .subscribe(
  18.         authData => this.storeToken(authData.id_token),
  19.         (err) => console.error(err),
  20.         () => console.log('Authentication Complete')
  21.       );
  22.   }
  23. }

原文: https://angular-2-training-book.rangle.io/handout/http/catching-rejections/