Cause, well, you wanna know RIGHT AWAY when this page changes....

wwdc-page-checker.rb

#!/usr/bin/env ruby


require 'rubygems'
require 'digest/sha1'
require 'tlsmail'
require 'time'


# To use: 
# gem install tlsmail  
# edit below settings for your gmail account
#

USER_EMAIL = '[email protected]'
USER_NAME = 'changeme'
USER_PASSWORD = 'changeme'


# send email helper

def send_email(from, from_alias, to, to_alias, subject, message, username, password)
	msg = <<END_OF_MESSAGE
From: #{from_alias} <#{from}>
To: #{to_alias} <#{to}>
Subject: #{subject}
	
#{message}
END_OF_MESSAGE
	
  Net::SMTP.enable_tls(OpenSSL::SSL::VERIFY_NONE)  
  Net::SMTP.start('smtp.gmail.com', 587, 'gmail.com', username, password, :login) do |smtp|  
    smtp.send_message(msg, from, to)  
  end
end

# check dub dub page
def check_wwdc_page_for_change
  # get previous sha1
  previous_sha1 = ''
  wwdc_last_sha1_file_name = File.expand_path("~/.wwdc_last_sha1.txt")
  if File.exists?(wwdc_last_sha1_file_name)
    sha1_file = File.open(wwdc_last_sha1_file_name, 'r')
    previous_sha1 = sha1_file.read
    sha1_file.close
  end

  # grab page and compute sha1

  wwdc_info_page = `curl http://developer.apple.com/wwdc/`
  sha1 = Digest::SHA1.hexdigest(wwdc_info_page)

  # report

  if sha1 != previous_sha1 
    puts "Site has changed!"
    send_email( '[email protected]', 'WWDC cron', USER_EMAIL, USER_NAME, 'WWDC page has changed', 'Dude, http://developer.apple.com/wwdc/ has changed', USER_EMAIL, USER_PASSWORD)
  else
    puts "No update."
  end

  #save new sha1
  sha1_file = File.open(wwdc_last_sha1_file_name, 'w')
  sha1_file.write(sha1)
  sha1_file.close
end


check_wwdc_page_for_change