title: Return a download and rendered page in one Flask response
body: <p>I want to return a rendered page and a downloadable file as a response to a request.  I've tried to return a tuple of both responses, but it doesn't work.  How can I serve the download and the page?</p>
  
  <pre><code>return response, render_template('database.html')
  return render_template('database.html'), response
  </code></pre>
  
  <p>Is Flask capable of handling such a scenario? Seems like a commonplace problem, I simply want to send a file back for download, then render the page.</p>