Angular2 observable & post - 访问响应

Question

我对 Observables 有点陌生，我已经成功发送了 POST api 请求并收到了正确的 JSON 响应：

{"id":138,"date":"2017-02-23T05:10:18"}

但我不确定如何访问此响应并对其进行处理。这是我的 post 服务：

  // sends a media(file blob) object to WP API
  updateMedia(file: File): Observable<File> {
    let headers = new Headers({ 
        'Access-Control-Expose-Headers': 'Authorization, Content-Type, Content-Disposition',
        'Content-Type': 'multipart/form-data',
        'Content-Disposition': 'attachment; filename='+file.name, 
        'Authorization': 'Basic cmh5c0B0aGVpdHRlYW0uY29tLmF1OkRlc3Ryb3lfMSE='
    }); 
    let options = new RequestOptions({ headers: headers }); // Create a request option

    return this.http.post(BASE_API, file, options)
    .map((response: Response) => response.json());
  }

这是我的 Observable：

  onUpdateMedia(file: File) {
    this.mediaService
      .updateMedia(file)
      .subscribe((
        file: File) => {
        this.file = Object.assign({}, this.file, event);
      });
    console.log(event); //hmm not what i want
  }

感谢任何帮助

Answer 1

您必须 return 来自可观察地图的响应，然后您才能在 subscribe 侦听器中获得响应。像这样

 // sends a media(file blob) object to WP API
  updateMedia(file: File): Observable<File> {
      ............

    return this.http.post(BASE_API, file, options)
    .map((response: Response) => return {res : response.json(), status : response.status});
  }


   onUpdateMedia(file: any) {
    this.mediaService
      .updateMedia(file)
      .subscribe((file: any) => {
        console.log(file, "Response from Post Request Here....")
      });
  }

Answer 2

您的回复是对象类型。在变量的对象类型中分配响应。

 my_res:any;
  onUpdateMedia(file: File) {
    this.mediaService
      .updateMedia(file)
      .subscribe((
        data: any) => {
        this.my_res=data
      });

  }

Angular2 observable & post - 访问响应

Angular2 observable & post - access response

angular

observable

angular2-services