You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: server.rb
    path of file: ./repos/spec/library/net-ftp/fixtures
    
    the code of the file until where you have to start completion: module NetFTPSpecs
  class DummyFTP
    attr_accessor :connect_message
    attr_reader :login_user, :login_pass, :login_acct

    # hostname or IP address
    attr_reader :hostname
    # port number
    attr_reader :server_port

    de
    
    def handle_request
      # Send out the welcome message.
      response @connect_message || "220 Dummy FTP Server ready!"

      begin
        while command = @socket.gets
          command, argument = command.chomp.split(" ", 2)

          if command == "QUIT"
            self.response("221 OK, bye")
            break
          elsif proc_handler = @handlers[command.downcase.to_sym]
            if argument.nil?
              proc_handler.call(self)
            else
              proc_handler.call(self, argument)
            end