title: Does Amazon S3's HTTP Uploads feature support web-hook style callbacks?
body: <p>When uploading files to Amazon S3 using the browser http upload feature, I know I can specify a success_action_redirect field/value that will tell my browser where to go when the upload is done.  </p>
  
  <p>I'm wondering: <strong>is it possible to ask Amazon to make a web hook style POST request to my web server whenever a file gets uploaded?</strong>  </p>
  
  <p>Basically, I want a way of being notified whenever a client uploads a new file, so that my server can process the upload.  I'd like to do this without relying on the client to make the request to my server to tell me the file has been uploaded (never trust the client, right?).</p>