title: Restricting upload of any other file on s3 bucket except the file for which the presigned url is generated
body: <p>I am using php to create a presigned url and send that to front-end and that uploads directly to s3 using that presigned url. I want to secure and restrict that upload.</p>
  <p>for example I have created a presigned url for file &quot;stack.txt&quot; and I want the upload to fail/restrict any other file of different name being uploaded to s3 bucket.</p>
  <p>How can I implement that ?</p>