title: Get size of request
body: <p>I have an API written using the express framework. As part of the logging/scaling-tests process, I'd like to know how large a received request is in bytes (so we can determine the effect it's going to have on the network).</p>
  
  <p>Is there a way of doing this? I've read through the Express Documentation and couldn't find anything. Will reading off the <code>content-length</code> header work? Or could that value be sent incorrectly?</p>