example.rb

require 'eventmachine'
require 'packet.rb'

class Foo < Packet
  id 3
  int :a
end

class LoginRequest < Packet
  id 1
  string :user_id, 32
  string :user_pw, 32
end

class LoginResponse < Packet
  id 4
  int :result
  string :user_nickname, 32
end

module TestClient
  def post_init
    puts 'connected'

    f = Foo.new
    f.a = 5
    send_data f.serialize

    a = LoginRequest.new
    a.user_id = 'pjc0247'
    a.user_pw = 'asdf1234'
    send_data a.serialize
  end

  def unbind
    puts 'disconnected'
  end

  def receive_data(data)
    size, id = data.unpack('II')

    case id
    when 3
      f = Foo.deserialize data
      puts "foo result #{f.a}"
    when 2
      r = LoginResponse.deserialize data
      puts "login result #{r.result} / #{r.user_nickname}"
    end
  end
end

EventMachine.run do
  EventMachine.connect 'localhost', 9916, TestClient
end