gistfile1.txt

#!/usr/bin/env ruby

require 'open-uri'

while true do
	r = open('http://google.com')
	raise StandardError if r.status != [ '200', 'OK' ]
	
	timestamp = Time.parse(r.read.match(/\<!\s*-- (.*?) (.*?)(--\s*\>)/)[2].strip)
	raise StandardError if (Time.now - timestamp) > 600

	sleep(60)
end