ValueDomainのDDNSを設定するRubyスクリプト

ddns.rb

# -*- coding: utf-8 -*-

require 'rubygems'
require 'open-uri'
require 'logger'
require 'yaml'

IP_REG_EXP = /^(\d|[01]?\d\d|2[0-4]\d|25[0-5])\.(\d|[01]?\d\d|2[0-4]\d|25[0-5])\.(\d|[01]?\d\d|2[0-4]\d|25[0-5])\.(\d|[01]?\d\d|2[0-4]\d|25[0-5])$/

CURRENT_DIR  = "#{File.dirname(File.expand_path(__FILE__))}/"
DOMAINS_PATH = "#{CURRENT_DIR}/domains.yml"
LOG_PATH     = "#{CURRENT_DIR}/ddns.log"
IP_PATH      = "#{CURRENT_DIR}/ip"

IP_URL   = 'http://dyn.value-domain.com/cgi-bin/dyn.fcg?ip'
DDNS_URL = 'http://dyn.value-domain.com/cgi-bin/dyn.fcg?d=%s&p=%s&h=%s&i=%s'

logger = Logger.new LOG_PATH, 'weekly'

# Get current ip adderss.
begin
  logger.info ip = open(IP_URL).read
  raise unless ip =~ IP_REG_EXP
rescue => e
  logger.error e
  exit
end

# Exit if the some ip address.
exit if ip == open(IP_PATH).read.strip

# Write ip address.
open(IP_PATH, 'w') {|f| f.puts ip}

# Update domains.
domains = YAML.load_file DOMAINS_PATH
domains.each do |d|
  begin
    logger.info url = sprintf(DDNS_URL, d[:domain], d[:password], d[:host], ip)
    logger.info open(url).read.gsub(/(\r|\n)/, ' ')
  rescue => e
    logger.error e
  end
end

domains.yml

--- 
- :domain: example.com
  :password: password
  :host: *