Angular2 observable & post - access response

Question

我对可观察到的有点新鲜，我已经成功发送了一个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此做些事情。这是我的帖子服务：

  // 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());
  }

这是我可观察的：

  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
  }

任何帮助

Answer 1

您必须从可观察到的地图上返回响应，并且可以在subscribe Listner中返回。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

您的响应是对象类型。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
      });
  }