title: Get user IP from remote script
body: <p>I have a page which loads a script from a remote location (say <code>myscript.com</code>.</p>
  
  <p>This scripts makes an Ajax request to a distant API.</p>
  
  <p>How can this API get the visitor's IP address?</p>
  
  <p>If I use <code>request.remote_addr</code> in the request handler, I get the IP from the script's location (<code>myscript.com</code>).</p>