gistfile1.rb

require 'rubygems'
require 'rack/cache'

infinity = Proc.new do |env|
  # env['HTTP_CACHE_CONTROL'] = 'max-age=60'
  
  [200, {"Content-Type" => "text/plain", 'Cache-Control' => 'max-age=60'}, env.inspect]
end

use Rack::CommonLogger

use Rack::Cache,
  :verbose =>  true,
  :metastore => 'file:/tmp/cache-test-m',
  :entitystore => 'file:/tmp/cache-text-e'

map '/' do
  run infinity
end

map '/version' do
  map '/' do
    run Proc.new {|env| [200, {"Content-Type" => "text/plain"}, "infinity 0.1"] }
  end
  
  map '/last' do
    run Proc.new {|env| [200, {"Content-Type" => "text/plain"}, "infinity beta 0.0"] }
  end
end

gistfile2.sh

rackup -s mongrel infinity.ru