I don't understand. If you want to advertise a printer, you should use ipp:
If you want to advertise a web server, you should use http:
Seems like the two should have very different user interfaces, which is
one of the reasons for exposing the ipp/http difference in the URL.
For instance, if I click on an http link, I expect my browser or OS
to display that file in a window or offer to save it locally.
If I click on an ipp link, my browser or OS should pop up
a window offering to print something to that printer, display
the pending jobs in the queue, install a driver for that printer,
tell me where the printer is and how much it costs to use it, etc.
Or maybe I can drag some other object and drop it on the
printer link, which causes it to be printed. etc.
Or I drag the printer link to my desktop, which causes an interface
to that printer to be installed on my system. Whatever. The
point is that just by looking at an ipp: URL, a browser or OS or
a human being can tell that it's a printer, and make use of that
information without actually having to talk to the thing.
Keith