config.ru

#!/usr/bin/env rackup
# encoding: utf-8

# This file can be used to start Padrino,
# just execute it from the command line.

require File.expand_path("../config/boot.rb", __FILE__)

require File.join(PADRINO_ROOT, "app/sockets.rb")
map "/sockets" do
  run WheresMyMoneySockets.new
end

map "/" do
  run Padrino.application
end

sockets.rb

class WheresMyMoneySockets < Rack::WebSocket::Application
  def on_open(env)
    p "Connected"
    send_data "Hi! :)"
    p Sessions.current_account
  end
  def on_close(env)
    p "Disconnected"
    send_data "Bye!"
  end
  def on_message(env, message)
    p "Message: #{message}"
    send_data "Echo #{message}"
  end
  def on_error(env, error)
    p "Error: #{error}"
    send_data "Echo #{error}"
  end
end