title: Regular Expression for Jmeter for http-response header
body: <p>How to use regular expression extractor to extract Etag from http-header response?</p>
  
  <p>I've the following output from my get and I want to extract <code>Etag</code> and use it in my next case where i've to pass it in my <code>http-header</code> to do <code>If-None-Match</code>. I've tried the following: <code>\Etag:\s?</code> and have chosen "Headers" in "Response Field to Check". But I don't see this value being sent to my header.  </p>
  
  <pre><code>Thread Name: Fetch_Links 1-1
  Sample Start: 2012-05-24 10:15:10 PDT
  Load time: 135
  Latency: 131
  Size in bytes: 4950
  Headers size in bytes: 641
  Body size in bytes: 4309
  Sample Count: 1
  Error Count: 0
  Response code: 200
  Response message: OK 
  </code></pre>
  
  <p>I'm using 2.6 version of jmeter. Thank you in advance.</p>