title: Send_file download and inline
body: <p>I'm using prawn to generate my pdf files and what i'd like to do is to show them in the browser window and at the same time download them to the <strong>file system</strong>.</p>
  
  <p>I already read this - <a href="https://stackoverflow.com/questions/7292625/rails-prawn-pdf-show-up-in-browser-etc">Rails, Prawn - PDF show up in browser &amp; etc</a> - but it's not what i'm looking for, because using the <code>Prawn render_file</code>, causes to save the pdf file in a project folder, whereas i want the docs to be saved in the user filesystem, in a download folder chosen by the user obviously (which can be done with the Rails <code>send_file</code> or <code>send_data</code>).</p>
  
  <p>So i was looking if it is possible to use the <code>send_file</code> at the same time to download the file and to show it in the browser window, but i didn't find anything. </p>
  
  <p>Other solutions are welcome :)</p>