instance method gets

# File activesupport/lib/active_support/vendor/memcache-client-1.7.4/memcache.rb, line 705
  def gets(key, raw = false)
    with_server(key) do |server, cache_key|
      logger.debug { "gets #{key} from #{server.inspect}" } if logger
      result = with_socket_management(server) do |socket|
        socket.write "gets #{cache_key}\r\n"
        keyline = socket.gets # "VALUE <key> <flags> <bytes> <cas token>\r\n"

        if keyline.nil? then
          server.close
          raise MemCacheError, "lost connection to #{server.host}:#{server.port}"
        end

        raise_on_error_response! keyline
        return nil if keyline == "END\r\n"

        unless keyline =~ /(\d+) (\w+)\r/ then
          server.close
          raise MemCacheError, "unexpected response #{keyline.inspect}"
        end
        value = socket.read $1.to_i
        socket.read 2 # "\r\n"
        socket.gets   # "END\r\n"
        [value, $2]
      end
      result[0] = Marshal.load result[0] unless raw
      result
    end
  rescue TypeError => err
    handle_error nil, err
  end