Angular2 http验证

Question

我想通过Angular2 Typescript进行身份验证，但它无法正常工作，因为它在浏览器中询问我。我的代码怎么了？

callrest(){
  let url="/edison";
  return this.http.post(url, this.getPutHeaders()).map(res => res.json()).subscribe(
               data => console.log(data),
               err => console.log(err)
            );;
}



private getPutHeaders(){
    let headers = new Headers();
    headers.append('Content-Type', 'text/plain');
    headers.append('Authorization', 'Basic ' +
      btoa('user:pw'));
    return new RequestOptions({
        headers: headers

    });
}