title: One http request with two http response in Chrome
body: <p>I set up jenkins in my local computer and try to visit it. I just put <code>http://127.0.0.1:8080/</code> in the address bar of Chrome and push the Enter button. Because I have not loggin, it returns a response with status <code>403</code>, but empty response body.This is the first line in below network screenshot.</p>
  <p>Then after this, it returs another http response with login forms, the second line in below netwrok screenshot.</p>
  <p>As I understand, there is no redirect function inside http status <code>403</code>. How does it return two response?</p>
  <p><a href="https://i.stack.imgur.com/mzExq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mzExq.png" alt="enter image description here" /></a></p>