I needed to handle custom account subdomains with Rails and I wrote a simple rack middleware for that http://github.com/drogus/rack-subdomain. It works by mapping any subdomain to given PATH. For example when user hits drogus.example.org/account and mapping is /users/:subdomain, it will map the request to example.org/users/drogus/account
I accomplished it with rack middleware, cause I wanted to have this mechanism also for Rails 2.x.
The thing is, I don't want to duplicate stuff that's already in router, so here is my question: is there any way to do such mapping with Rails 3 router? Or maybe a better way to handle custom account subdomains?