如何在angular拦截器中从响应头中获取特定值

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpResponse } from '@angular/common/http';

@Injectable()
export class CustomInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler) {
    return next.handle(req).pipe(
      tap(event => {
        if (event instanceof HttpResponse) {
          const customHeaderValue = event.headers.get('Custom-Header');
          console.log('Custom Header Value:', customHeaderValue);
        }
      })
    );
  }
}