trying to set up a cool.io chat server with sinatra. Please advise.

sinatra test

#!/usr/bin/ruby
require 'rubygems'
require 'sinatra'
require 'cool.io'

#config
ADDR = '127.0.0.1'
PORT = 4321


class EchoServerConnection < Cool.io::TCPSocket
  def on_connect
    puts "#{remote_addr}:#{remote_port} connected"
  end

  def on_close
    puts "#{remote_addr}:#{remote_port} disconnected"
  end

  def on_read(data)
    write data
  end
end

class ClientConnection < Cool.io::TCPSocket
  def on_connect
    puts "#{remote_addr}:#{remote_port} connected"
    write "bounce this back to me"
  end

  def on_close
    puts "#{remote_addr}:#{remote_port} disconnected"
  end

  def on_read(data)
    puts "got #{data}"
    close
  end

  def on_resolve_failed
    print "DNS resolve failed"
  end

  def on_connect_failed
    print "connect failed, meaning our connection to their port was rejected"
  end
end

get '/server' do 
  server = Cool.io::TCPServer.new(ADDR, PORT, EchoServerConnection)
  server.attach(Cool.io::Loop.default)
  "Echo server listening on #{ADDR}:#{PORT}"
  Cool.io::Loop.default.run
  
end

get '/client' do
  event_loop = Cool.io::Loop.default
  client = ClientConnection.connect(ADDR, PORT)
  client.attach(event_loop)
  "Echo client connecting to #{ADDR}:#{PORT}..."
  event_loop.run
end