Using rack-cache on Sinatra

app.rb

require "rubygems"
require "bundler"

get "/foo" do
  cache_control :public, max_age: 1800  # 1800 sec = 30 mins.
  "Hello world"
end

config.ru

require 'bundler'
Bundler.require

require_relative 'app'

use Rack::Cache,
  verbose: true,
  metastore: 'file:/path/to/cache/meta',
  entitystore: 'file:/path/to/cache/body'
  # metastore:   "memcached://#{memcache_servers}",
  # entitystore: "memcached://#{memcache_servers}"


run Sinatra::Application

Gemfile

gem "rack-cache", require: "rack/cache"

gistfile1.md

ref:

rtomayko/rack-cache
Sinatra with rack-cache on Heroku - The Pug Automatic