title: How do I copy wsgi.input if I want to process POST data more than once?
body: <p>In WSGI, post data is consumed by reading the file-like object <code>environ['wsgi.input']</code>. If a second element in the stack also wants to read post data it may hang the program by reading when there's nothing more to read.</p>
  
  <p>How should I copy the POST data so it can be processed multiple times?</p>