Question

您好我想在使用angular2的http请求后处理全局401错误。我想扩展BaseResponseOptions类。这是正确的方式吗？

Answer 1

您可以扩展Http类本身来全局处理此类错误。这样，您就可以在基础请求上利用catch运算符并捕获401错误。

@Injectable()
export class CustomHttp extends Http {
  constructor(backend: ConnectionBackend, defaultOptions: RequestOptions) {
    super(backend, defaultOptions);
  }

  request(url: string | Request, options?: RequestOptionsArgs): Observable<Response> {
    console.log('request...');
    return super.request(url, options).catch(res => {
      // do something
    });        
  }

  get(url: string, options?: RequestOptionsArgs): Observable<Response> {
    console.log('get...');
    return super.get(url, options).catch(res => {
      // do something
    });
  }
}

并按如下所述进行注册：

bootstrap(AppComponent, [HTTP_PROVIDERS,
    new Provider(Http, {
      useFactory: (backend: XHRBackend, defaultOptions: RequestOptions) => new CustomHttp(backend, defaultOptions),
      deps: [XHRBackend, RequestOptions]
  })
]);

仅使用响应选项，您将无法拦截请求/响应。

BaseResponseOptions angular2处理全局错误

1 个答案: