title: How to capture apache proxypass response time??
body: <p>%t and %d are the tokens in apache logs for response time . Is there any way to get the response time ?? 
  My idea is to pass response time as variable in error document redirection . </p>
  
  <pre><code> &lt;/&gt; 
     ErrorDocument /test.py?response_time= %t or %d 
    &lt;proxypass&gt;....&lt;/proxypass&gt; 
    &lt;proxyreverse&gt;....&lt;/proxyreverse&gt; 
   &lt;/&gt; 
  </code></pre>
  
  <p>Any kind off alternative solution will accepted.</p>