Sinatra Rack App support for http://clickfrog.ru via module converted from Rails ActionController

clickfrog_sinatra_rack.rb

require 'sinatra'

# You could move entire module to separate file and include in main app via require_relative
module ClickFrog

  def clickfrog_counter
    return unless request.host && request.referer
    require 'socket'

    data = Hash[
      'REMOTE_ADDR' =>  request.env['REMOTE_ADDR'],
      'HTTP_USER_AGENT' =>  request.env['HTTP_USER_AGENT'],
      'HTTP_HOST' => request.env['HTTP_HOST'],
      'REQUEST_METHOD' => request.env['REQUEST_METHOD'],
      'REQUEST_URI' => request.env['REQUEST_URI'],
      'HTTP_REFERER' => request.env['HTTP_REFERER'],
      'QUERY_STRING' => request.env['QUERY_STRING'],
      'HTTP_X_FORWARDED_FOR' => request.ip
    ].delete_if { |k, v| v.to_s.strip.empty? }

    require 'json' # make sure json is accessible
    data = JSON.dump(data) # unicode escaping in to_json
    data = ERB::Util.url_encode(data) # try url encode method
    data.insert(0, 'header=')
    m_id = ('%08x' % (Time.now.to_f * 10000))[-8..-1] + ('%08x' % data.hash.abs)[0..7]
    data = "CFSTAT##{m_id}[#{data}]END"

    sock = UDPSocket.new(Socket::AF_INET)
    sock.connect('stat.clickfrog.ru', 83)

    5.times do
      begin
        sock.send(data, 0)
      rescue
        clickfrog_counter_tcp(data)
      end
    end
  end

  def clickfrog_counter_tcp(msg)
    
    require "uri"
    require "net/http"

    url = URI.parse('http://stat.clickfrog.ru/server_side_action.php')
    req = Net::HTTP::Post.new(url.path)
    req.body = msg
    con = Net::HTTP.new(url.host, url.port)
    con.start {|http| http.request(req)}
    
  end
end

# You must include module in the main app body
include ClickFrog

before do
  # Invoke 'clickfrog_counter' method before anythimg else
  clickfrog_counter
end

get '/' do
  # Do not forget to proper set up your main app view
  erb :index
end