title: S3: Allow download of files for those who have some token
body: <p>Is it possible to only allow download from Amazon's S3 for anyone who have some token and a link to some file in my bucket?</p>
  
  <p>This token, for example, can be generated by my upload backend server, and appended to the uploaded file.</p>
  
  <p>What possibilities do I have here?</p>
  
  <p><strong>Edit</strong></p>
  
  <p>When I said download from S3, I mean directly from S3 not through my server, only upload happens through server</p>