#enum_memcache_keys.rb:

require 'rubygems'
require 'socket'

class EnumMemcacheKeys

  MEMCACHE_STATS = ["END", "OK", "DELETE", "ERROR"]

  class << self
    def open(host, port)
      s = TCPSocket.open host, port
      yield s if block_given?
    ensure
      s.close if s
    end

    def items(host = 'localhost', port = '11211')
      i = []
      open(host, port) do |s|
        s.send("stats items\r\n", 0)

        until MEMCACHE_STATS.include?(line = s.gets.strip) do
          i << line
        end
      end
      
      i
    end

    def keys(host = 'localhost', port = '11211')
      keys = []

      open(host, port) do |s|
        buff = items(host, port)

        items = []
        buff.each { |b| items << b.split(':')[1] }

        keys = []
        items.each do |i|
          s.send("stats cachedump #{i} 0\r\n", 0)
          until MEMCACHE_STATS.include?(line = s.gets.strip) do
            keys << line.split(' ')[1]
          end
        end
      end

      keys
    end

    protected :open
  end

end

#use
p EnumMemcacheKeys.items
p EnumMemcacheKeys.keys('10.0.0.5', '11211')