It would be awesome to have this as a more native component of modern webservers.

I built something recently using Flask to do this for a client of mine. See it in action here: http://files.arbesko.com/

And get the source on github! https://github.com/whalesalad/arbesko-files

Please keep in mind this was my first Flask app and I was doing it more as a fun experiment for a friend I had done work for in the past.