title: Changing POST data used by Apache Bench per iteration
body: <p>I'm using <a href="http://httpd.apache.org/docs/1.3/programs/ab.html" rel="noreferrer">ab</a> to do some load testing, and it's important that the supplied querystring (or POST) parameters change between requests.</p>
  
  <p>I.e. I need to make requests to URLs like:</p>
  
  <pre><code>http://127.0.0.1:9080/meth?param=0
  http://127.0.0.1:9080/meth?param=1
  http://127.0.0.1:9080/meth?param=2
  ...
  </code></pre>
  
  <p>to properly exercise the application.</p>
  
  <p>ab seems to only read the supplied POST data file once, at startup, so changing its content during the test run is not an option.</p>
  
  <p>Any suggestions?</p>