irc socket loop

.rb

    require "socket"
    socket = Module.new do
      @server = server
      @port = port

      @socket = nil
      def self.rescue_socket
        yield
      rescue SocketError, Errno::ENETDOWN, Errno::ENETUNREACH
        @socket = nil
        sleep 5
        retry
      end
      private_class_method :rescue_socket
      def self.socket
        @socket ||= rescue_socket do
          TCPSocket.new(@server, @port)
        end
      end
      private_class_method :socket
      
      @buffer = ""
      def self.read
        until i = @buffer.index(?\n)
          @buffer.concat( rescue_socket do
            return unless select [socket], nil, nil, 1
            @socket.read(@socket.nread).tap{ |_| raise SocketError if _.empty? }
          end )
        end
        @buffer.slice!(0..i).chomp
      end
      def self.write str
        socket.send str + "\n", 0
      end
    end