Matching a route based on hostname is possible with a few patches to the rails routing code. I followed the advice on Jamis Buck's weblog and patched two methods from my environment.rb:
module ActionController
module Routing
class RouteSet
def extract_request_environment(request)
{ :method => request.method, :hostname => request.domain.split('.').first }
end
end
class Route
alias_method :old_recognition_conditions, :recognition_conditions
def recognition_conditions
result = old_recognition_conditions
result << "conditions[:hostname] === env[:hostname]" if conditions[:hostname]
result
end
end
end
end
You can then write routes like:
map.connect '', :controller => 'blah', :action => 'blah', :conditions => {:hostname => 'blah'}
Obviously, you can use a regular expression for the condition argument if you like.
