Angular 8 拦截和修改Http错误响应

Question

我需要拦截和修改一个 HttpResponse，它是 HttpErrorResponse 的实例，即状态:500，状态为 200 并填写其正文，以便我可以在我的 http.post 的 Observable 订阅中处理它作为成功的 http 调用。

Answer 1

我设法使用以下拦截器修改了 HttpErrorResponse:

export class CustomErrorHttpInterceptor implements HttpInterceptor {

  constructor() {}

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    return next.handle(request).pipe(
      catchError((httpErrorResponse: HttpErrorResponse) => {

        // Customize as you wish:
        const newHttpErrorResponse = new HttpErrorResponse( {
          error: httpErrorResponse.error,
          headers: httpErrorResponse.headers,
          status: httpErrorResponse.status,
          statusText: httpErrorResponse.statusText,
          url: httpErrorResponse.url
        });

        return Observable.throw(newHttpErrorResponse);
      })
    );
  }
}