EveryDNS update script (See related posts)

#!/usr/bin/env ruby
require 'optparse' 
require 'net/http' 
require 'cgi' 

class EveryDnsUpdater
  attr_accessor :user, :pass
  attr_reader :ip, :code, :body

  def params
    @params ||= {"ver" => "0.1"}
  end
      
  def host
    "dyn.everydns.net"
  end
  
  def query
    "/index.php?" + params.collect{ |k,v| "#{k}=#{CGI.escape(v)}"}.join('&')
  end
  
  def parse(body)
    @body   = body
    @code   = @body.scan(/Exit Code: (\d+)/i).to_s.to_i
    @ip     = @body.scan(/IP now: ([\d\.]+)/).to_s
  end
      
  def run
    Net::HTTP.start(host) do |http| 

      req = Net::HTTP::Get.new(query) 
      req.basic_auth(user, pass)
      response = http.request(req)
      case response
      when Net::HTTPSuccess
        parse(response.body)
        return @code
      else
        return response.code
      end
    end
  end
end

opts = OptionParser.new 
updater = EveryDnsUpdater.new

opts.banner = "Usage: everydns [options]"
opts.separator ""
opts.on("-u", "--user=USER", "User name") { |str| updater.user = str } 
opts.on("-p", "--pass=PASS", "Password") { |str| updater.pass = str } 
opts.on("-d", "--domain=DOMAIN", "Domain name you wish to update")  { |str| updater.params["domain"] = str } 
opts.on("-a", "--address=[IP]", "IP address you want to supply") { |str| updater.params["ip"] = str } 
opts.on_tail("-h", "--help")   { puts opts; exit } 

opts.parse(ARGV)

if ARGV.empty? or updater.user.nil? or updater.pass.nil? or updater.params["domain"].nil?
  puts opts
  exit
end

if updater.run == 0
  puts "IP address set to #{updater.ip} successfully..."
else
  puts "Not successful..."
  puts updater.body
end