Expand a shorten URI

gistfile1.rb

require 'net/http'
require 'uri'
require 'pp'

def expandShortenURI(s)
  uri = URI(s)
  Net::HTTP.start(uri.host, uri.port) {|http|
    response = http.head(uri.request_uri)
    case response
    when Net::HTTPRedirection
      expandShortenURI(response['location'])
    else
      return s
    end
  }
end

ARGV.each {|s|
  puts expandShortenURI(s)
}