server_client_tcp_example.rb

# client.rb
require 'socket'
require 'digest/sha1'
require 'json'
hostname = "localhost"
port = 2000
socket = TCPSocket.open(hostname, port)
1.times do |i|
  content = "#{i.to_s}: #{ARGV[0].to_s}"
  msg = {
    :header => :mss,
    :secret => Digest::SHA1.hexdigest(ENV['P_SECRET']),
    :content => content
  }
  j_msg = msg.to_json
  puts j_msg
  socket.puts(j_msg)
  sleep 0.2
end
socket.close

# server.rb
require 'socket'

server = TCPServer.open(2000)
loop do
  client = server.accept
  while line = client.gets
    puts "received #{line}"
  end
  #client.puts("Ping time=#{Time.now.ctime}")
  #client.puts "closing connection"
  client.close
end