如何优雅地处理404中的角分量?

在这个特定的用例中,我们希望处理404,而不是将其传递给组件以在UI中显示文本消息。

// code in service
public getVariatioMarginPlugDates(): Observable<Date[]> {
return this._http
              .get<Date[]>(AppSettings.VariationMarginPlugDatesUrl, { withCredentials: true })
              .pipe(catchError(this._trace.handleError('GET ' + AppSettings.VariationMarginPlugDatesUrl, [])));
}

404 也由 catchError 404

非常感谢!

// edited code with solution
public getVariatioMarginEmail(runDate: string): Observable<any> {
const url = AppSettings.VariationMarginEmailUrl.replace(this._regExp, runDate);
return this._http
              .get<any>(url, { withCredentials: true })
              .catch(this._trace.handleError('GET ' + url, []));
}

public handleError<T>(operation = 'operation',  result?: T, skipStatus = [404]) {
    return (error: any): Observable<T> => {

      if (skipStatus.includes(error.status)) {
        return observableOf(error.status as T);
      }

      const errMsg = (error.message) ? error.message : error.status ? `${error.status} - ${error.statusText}` : 'Server error';
      console.error(errMsg);

      const dialog = this._dialogService.open({
        title: 'Server Error',
        content: `${operation} failed: ${errMsg}`,
        actions: [ { text: 'Ok' } ]
      });

      try { this._loggingService.log(errMsg); } catch (error) {}

      return observableOf(result as T); // return empty result
  };
}