What is the point in using a Tor hidden service then? If the point is to give anonymity only to the originator of the file, then they can already do that by connecting to your service using Tor, but not via a hidden service... By using a hidden service you're just doubling the number of Tor nodes that have to transfer the file initially from 3 to 6... The point of a hidden service is to provide anonymity for both parties.

You are right. The only difference is that I am "forcing" people to use Tor to get there, you can't get there without tor

If that's your goal, you could simply block access to your service from hosts other than Tor Exit Nodes. You could do this by combining:

https://www.torproject.org/projects/tordnsel.html

With the mod_access_dnsbl module for Apache.