Angular2 HTTP请求未附加标头

Question

In my application, I am trying to send a quick test request to my API to test my authentication. When a button is clicked, this function is called, which creates an Authorization header and makes an HTTP request:

  public test() {
    const headers: Headers = new Headers();
    headers.append('Authorization', 'Bearer ' + this.auth.token);
    this.http.get('http://localhost:62940/api/ping/secure', { headers: headers }).subscribe(x => {
      console.log(x);
    });
  }

However, when I'm debugging (or analyzing traffic using Fiddler), headers has the header that I created, but nothing is being appended to the Http request.

Answer 1

You have to use RequestOptions and append header to.

let headers = new Headers();

headers.append('Authorization', 'Bearer ' + this.auth.token);
let options = new RequestOptions({headers: headers});
this.http.get(URL, options).subscribe(x => {
     console.log(x);
});

Answer 2

Take a look at: https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/withCredentials

If you are making a CORS request, you need to add the "withCredentials: true" RequestOption with the HTTP request. Otherwise, authorization headers will not be added with the request.

public test() {
   const headers: Headers = new Headers();
   headers.append('Authorization', 'Bearer ' + this.auth.token);
   this.http.get('http://localhost:62940/api/ping/secure', {
      withCredentials: true,
      headers: headers
   }).subscribe(x => {
       console.log(x);
   });
}

You also need to make sure that your server will accept the Authorization header by adding an "Acess-Control-Allow-Credentials = true" header to the pre-flight response, though this is different from server to server. Also, make sure CORS is enabled on the server as well.