gistfile1.rb

# Allows something like:
#   map.admin "/:action/:id", controller: :admin, conditions: { host: "admin.example.com" }
module ActionController
  module Routing
    class RouteSet
      def extract_request_environment(request)
        { method: request.method, host: request.host }
      end
    end

    class Route
      def recognition_conditions
        result = ["(match = #{Regexp.new(recognition_pattern).inspect}.match(path))"]
        result << "[conditions[:method]].flatten.include?(env[:method])" if conditions[:method]
        result << "conditions[:host] == env[:host]" if conditions[:host]
        result
      end
    end
  end
end