Dan-Q/c301.rb

## c301.rb
#!/usr/bin/ruby
#
#           Author: Dan Q (dan@scatmania.org)
# More information: http://www.scatmania.org/?p=4600
#
# This program is free software. It comes without any warranty, to
# the extent permitted by applicable law. You can redistribute it
# and/or modify it under the terms of the Do What The Fuck You Want
# To Public License, Version 2, as published by Sam Hocevar. See
# http://sam.zoy.org/wtfpl/COPYING for more details.
#
require 'rubygems'
require 'sinatra'                          # gem install sinatra
require 'sinatra/reloader' if development? # gem install sinatra-reloader

LIFESPAN = 365 * 86400 # sustain "cookie" for 365 days

get '/' do
  redirect '/page/Home', 301
end

get '/page/:page_name' do
  page_name = params[:page_name].gsub(/[^a-z0-9 ]/i,'')
  result = <<-END_OF_HTML
    <!DOCTYPE html>
    <html>
      <head>
        <title>C301 Cookieless Tracking Example</title>
      </head>
      <body>
        <h1>#{page_name} Page</h1>
        <p>This is the #{page_name} page.</p>
        <p>Go to: <a href="/page/Home">Home Page</a> | <a href="/page/Second">Second Page</a> | <a href="/page/Third">Third Page</a></p>
        <p><strong>How does this work?</strong> <a href="http://scatmania.org/?p=4600">This blog post explains everything</a>.</p>
        <div id="session_info"><span style="color: red;">This sample requires Javascript (but does not require cookies!).</span></div>
        <script language="Javascript" src="/c301.js"></script>
      </body>
    </html>
  END_OF_HTML
  result.strip
end

get '/c301.js' do
  # generate a unique ID for this visitor and redirect them
  unique_id = "#{Time::now.to_i}#{rand(999999999)}"
  headers 'Expires' => (Time::now + LIFESPAN).httpdate
  redirect "/c301-#{unique_id}.js", 301
end

get '/c301-:unique_id.js' do
  # track the user by their unique ID
  headers 'Content-Type' => 'application/javascript', 'Expires' => (Time::now + LIFESPAN).httpdate
  first_visit = Time::at(params[:unique_id][0...10].to_i)
  result = <<-END_OF_JS
    document.getElementById('session_info').innerHTML = '<p>Your unique ID is #{params[:unique_id]}.<br />Your first visit was #{first_visit}.</p><p>Now close your web browser, re-open it, and return to this page - or just click the links to browse to other pages. Even though no cookie has been set, you\\'ll see the same unique ID and first visit datetime. Try in a different browser or clear your cache to see a different unique ID.';
  END_OF_JS
  result.strip
end

get '/c301.rb' do
  # allow downloading of this source file
  headers 'Content-Type' => 'application/x-ruby-script'
  File::read(__FILE__)
end
	#!/usr/bin/ruby
	#
	# Author: Dan Q (dan@scatmania.org)
	# More information: http://www.scatmania.org/?p=4600
	#
	# This program is free software. It comes without any warranty, to
	# the extent permitted by applicable law. You can redistribute it
	# and/or modify it under the terms of the Do What The Fuck You Want
	# To Public License, Version 2, as published by Sam Hocevar. See
	# http://sam.zoy.org/wtfpl/COPYING for more details.
	#
	require 'rubygems'
	require 'sinatra' # gem install sinatra
	require 'sinatra/reloader' if development? # gem install sinatra-reloader

	LIFESPAN = 365 * 86400 # sustain "cookie" for 365 days

	get '/' do
	redirect '/page/Home', 301
	end

	get '/page/:page_name' do
	page_name = params[:page_name].gsub(/[^a-z0-9 ]/i,'')
	result = <<-END_OF_HTML
	<!DOCTYPE html>
	<html>
	<head>
	<title>C301 Cookieless Tracking Example</title>
	</head>
	<body>
	<h1>#{page_name} Page</h1>
	<p>This is the #{page_name} page.</p>
	<p>Go to: <a href="/page/Home">Home Page</a> \| <a href="/page/Second">Second Page</a> \| <a href="/page/Third">Third Page</a></p>
	<p><strong>How does this work?</strong> <a href="http://scatmania.org/?p=4600">This blog post explains everything</a>.</p>
	<div id="session_info"><span style="color: red;">This sample requires Javascript (but does not require cookies!).</span></div>
	<script language="Javascript" src="/c301.js"></script>
	</body>
	</html>
	END_OF_HTML
	result.strip
	end

	get '/c301.js' do
	# generate a unique ID for this visitor and redirect them
	unique_id = "#{Time::now.to_i}#{rand(999999999)}"
	headers 'Expires' => (Time::now + LIFESPAN).httpdate
	redirect "/c301-#{unique_id}.js", 301
	end

	get '/c301-:unique_id.js' do
	# track the user by their unique ID
	headers 'Content-Type' => 'application/javascript', 'Expires' => (Time::now + LIFESPAN).httpdate
	first_visit = Time::at(params[:unique_id][0...10].to_i)
	result = <<-END_OF_JS
	document.getElementById('session_info').innerHTML = '<p>Your unique ID is #{params[:unique_id]}.<br />Your first visit was #{first_visit}.</p><p>Now close your web browser, re-open it, and return to this page - or just click the links to browse to other pages. Even though no cookie has been set, you\\'ll see the same unique ID and first visit datetime. Try in a different browser or clear your cache to see a different unique ID.';
	END_OF_JS
	result.strip
	end

	get '/c301.rb' do
	# allow downloading of this source file
	headers 'Content-Type' => 'application/x-ruby-script'
	File::read(__FILE__)
	end