Refresh dreamhost dns entry with public ip

dns.rb

require 'uri'
require 'net/http'

DREAMHOST_API_KEY = ENV['DREAMHOST_API_KEY']
DNS_RECORD = "host.example.com"
TIMER = 600

abort "missing api key" if DREAMHOST_API_KEY.nil?

Process.daemon

loop do
    pid = Process.fork do
      begin
        # find current public ip
        ip = Net::HTTP.get(URI('http://bot.whatismyipaddress.com'))
        raise "can't find ip" if ip.nil?

        uri = URI("https://api.dreamhost.com")

        # remove existing dns entry
        uri.query = URI.encode_www_form :key => DREAMHOST_API_KEY, :cmd => "dns-remove_record", :record => DNS_RECORD, :type => "A", :value => ip
        Net::HTTP.get uri

        # add dns entry
        uri.query = URI.encode_www_form :key => DREAMHOST_API_KEY, :cmd => "dns-add_record", :record => DNS_RECORD, :type => "A", :value => ip
        Net::HTTP.get uri
      rescue
        puts "ruh-roh"
      end
    end

    Process.waitpid(pid)


  sleep TIMER
end