config.ru

# Start Command: rackup
require 'socket'

# Initialize Socket -> Pure Data
pd = TCPSocket.new 'localhost', 3000

# Create HTTP Server
app = Proc.new do |env|
  # /?Do=1&Re=0
  query = env['QUERY_STRING']
  # [['Do', 1], ['Re', 0]]
  params = URI.decode_www_form(query)
  
  # ['Do 1', 'Re 0']
  # "Do 1;\nRe 0"
  # "Do 1;\nRe 0;\n"
  pd.send(params.map { |param| param.join(' ') }.join(";\n") + ";\n",0)
  
  [200, {'Content-Type' => 'text/plain'}, ['Success']]
end

run app
# Don't pd.close