with_http_router.rb

require "rubygems"
require "bundler"
Bundler.setup(:default, :example)

require 'cramp'
require 'http_router'
require 'thin'

class HomeController < Cramp::Action
  def before_start
    if params[:password] != 'foo'
      halt 401, {}, "Bad Password"
    else
      continue
    end
  end

  def start
    EM.add_timer(1) { render "Hello World"; finish }
  end

  def on_finish
    # asycn body closed
  end

end

routes = HttpRouter.new do
  add('/(:password)').to(HomeController)
end

Rack::Handler::Thin.run routes, :Port => 3000