title: Angular 2: Can't access response headers in a http request
body: <p>I'm using angular2-http(alpha.44) module to retrieve data from a REST Api. I can't figure out how to access the information that comes in the headers map of the response, from which I need a specific field. Example:</p>
  
  <pre><code>var req = new Request({
    url: `localhost/api/products`,
    method: RequestMethods.Get
  });
  
  this.http.request(req).subscribe(
    res =&gt; {
      // Can't access the headers of the response here.... res.headers is empty
      },
    error =&gt; { ... },
    _ =&gt; {}
  );
  </code></pre>
  
  <p>Strangely enough, if I check the network traffic in the browser's dev tools, the response headers are present...</p>