title: What HTTP headers are required to refresh a page on back button
body: <p>I'm trying to get a page to refresh when navigated to from the back button.  From what I understand after reading around a bit I should just need to mark the page as uncacheable but I can't get any browsers to refresh the page.  These are the headers I've currently got:</p>
  
  <pre><code>Cache-Control:no-cache
  Connection:keep-alive
  Content-Encoding:gzip
  Content-Length:1832
  Content-Type:text/html; charset=utf-8
  Date:Mon, 07 Jun 2010 14:05:39 GMT
  Expires:-1
  Pragma:no-cache
  Server:Microsoft-IIS/7.5
  Vary:Accept-Encoding
  Via:1.1 smoothwall:800 (squid/2.7.STABLE6)
  X-AspNet-Version:2.0.50727
  X-AspNetMvc-Version:2.0
  X-Cache:MISS from smoothwall
  X-Powered-By:ASP.NET
  </code></pre>
  
  <p>Why would the browser pull this page from it's browser history and not refresh it?</p>