Local IP lookup

GetIP

#!/usr/bin/env ruby
require 'socket'

class GetIP
  def self.local_ip
    orig, Socket.do_not_reverse_lookup = Socket.do_not_reverse_lookup, true

    UDPSocket.open do |s|
      s.connect '64.233.187.99', 1 # Relax, nothing is hitting the network
      s.addr.last
    end
  ensure
    Socket.do_not_reverse_lookup = orig
  end
end

if $0 == __FILE__
  puts GetIP.local_ip
end