Multi process echo server

app.rb

require 'socket'

def main(host, port)
  Process.setproctitle "ruby_init"
  s = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
  sockaddr = Socket.sockaddr_in(port, host)
  s.bind(sockaddr)
  s.listen(5)
  Process.fork do
    Process.setproctitle "ruby_server"
    loop do
      conn, addr = s.accept
      pid = Process.fork do
        Process.setproctitle "ruby_child"
        loop do
          mesg, sockaddr = conn.recvfrom(64)
          break if mesg.empty?
          conn.send(mesg, 0, conn.getsockname)
        end
        conn.close && exit
      end
      Process.detach pid
    end
  end
end

main("0.0.0.0", 8080)

http.rb

require 'socket'

# 名前空間の関係で全く動かないのでテストのサンプル
class ResponseGenerator
  def initialize(mesg)
    @mesg = mesg
  end
  def response(html)
    "HTTP/1.0 200 OK
Content-Type: text/html
Server: my-rubvy
Content-Length: " + html.bytesize.to_s + "

" + html + "\n"
  end
end

def main(host, port)
  
  Process.setproctitle "ruby_init"
  s = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
  sockaddr = Socket.sockaddr_in(port, host)
  s.bind(sockaddr)
  s.listen(5)
  Process.fork do
    Process.setproctitle "ruby_server"
    loop do
      conn, addr = s.accept
      pid = Process.fork do
      Process.setproctitle "ruby_child"
      loop do
        mesg, sockaddr = conn.recvfrom(64)
        break if mesg.empty?
        r = new ResponseGenerator(mesg)
        conn.send(r.response(), 0, conn.getsockname)
        conn.close
        break
        end
      conn.close && exit
     end
     Process.detach pid
     end
  end
end

main("0.0.0.0", 8080)

http_test.rb

require 'minitest/autorun'
require './http'


class ResponseGeneratorTest < Minitest::Test
  def test_generate_response
    expexted = "HTTP/1.0 200 OK
Content-Type: text/html
Server: my-rubvy
Content-Length: 23

<h1>hello world!!!</h1>
"
    actual = ResponseGenerator.new("hogehoge").response("<h1>hello world!!!</h1>")
    assert_equal expexted, actual
  end

    def test_generate_response2
      expexted = "HTTP/1.0 200 OK
Content-Type: text/html
Server: my-rubvy
Content-Length: 17

<h2>piyo piyo</2>
"
    actual = ResponseGenerator.new("hogehoge").response("<h2>piyo piyo</2>")
    assert_equal expexted, actual
  end


end