gistfile1.rb

require 'rubygems'
require 'sinatra/base'

class MyApp < Sinatra::Base
  disable :protection
  get '/' do
    g = params[:arg]
    t1 = Thread.new do
      sleep 4
      File.open("data.txt", "a+") do |f|
        f.puts "got #{g}"
      end
    end
    "pong"
  end

  run! if app_file == $0
end