em-proxy test with Rack

proxy.rb

#!/usr/bin/env ruby

require 'em-proxy'

Proxy.start(:host => "0.0.0.0", :port => 3000) do |conn|
  conn.server :fast, :host => '127.0.0.1', :port => 3001
  conn.server :slow, :host => '127.0.0.1', :port => 3002
  conn.on_data do |data|
    data
  end
  conn.on_response do |server, resp|
    if server == :fast
      resp
    else
      puts "Got slow resp"
    end
  end
end

sleepy.ru

# Rack app with configurable speed:
#
# In one shell, run the fast app:
# $ thin -R sleepy.ru -p 3001 start
#
# In another shell, run the slow app:
# $ SLEEP=1 thin -R sleepy.ru -p 3002 start

require 'rack'

SLEEP = ENV['SLEEP'].to_i

sleepy = lambda do |env|
  sleep SLEEP
  [200, {}, "Slept for #{SLEEP}\n"]
end

run sleepy