Ruby script to shorten a url by TinyURL.(ver.2)

tinyurl_shoten_2.rb

#!/usr/local/bin/ruby
# coding:utf-8
#*************************************
# TinyURL API で ロング URL を短縮する
#*************************************
#
require 'cgi'
require 'net/http'
require 'open-uri'

class TinyurlShorten
  SERVER = "tinyurl.com"
  PATH   = "/api-create.php"

  def initialize(arg)
    @url_long = arg
  end

  def shorten
    puts "URL(LONG) : #{@url_long}"
    query = "url=#{URI.encode(@url_long)}"
    url_short = Net::HTTP.get(SERVER, "#{PATH}?#{query}")
    puts "URL(SHORT): #{url_short}"  # => http://tinyurl.com/j3nceqk
  end
end

exit 0 unless __FILE__ == $0
exit 0 unless arg = ARGV.shift
TinyurlShorten.new(arg).shorten