Rack::Attack heroku demo w/ Redis

config.ru

require 'rubygems'
require 'bundler/setup'
require 'rack/attack'

require 'active_support'
require 'active_support/cache/redis_store'
redis = ENV['REDISTOGO_URL'] || 'localhost'
Rack::Attack.cache.store = ActiveSupport::Cache::RedisStore.new(redis)

Rack::Attack.throttle("path", :limit => 2, :period => 2) { |req| req.path }

use Rack::Attack

app = ->(env) { [200, {'Content-Type' => 'text/plain'}, ["Hello world\n"]] }
run app

Gemfile

source 'https://rubygems.org'

gem 'rack-attack', :ref => '1c01e6097ce18f486d887ebbeb9f0c4b434cd8f5', :git => 'https://github.com/kickstarter/rack-attack.git'
gem 'redis-activesupport'

Gemfile.lock

GIT
  remote: https://github.com/kickstarter/rack-attack.git
  revision: 1c01e6097ce18f486d887ebbeb9f0c4b434cd8f5
  ref: 1c01e6097ce18f486d887ebbeb9f0c4b434cd8f5
  specs:
    rack-attack (2.1.0)
      rack

GEM
  remote: https://rubygems.org/
  specs:
    activesupport (3.2.12)
      i18n (~> 0.6)
      multi_json (~> 1.0)
    i18n (0.6.4)
    multi_json (1.6.1)
    rack (1.5.2)
    redis (3.0.3)
    redis-activesupport (3.2.3)
      activesupport (~> 3.2.3)
      redis-store (~> 1.1.0)
    redis-store (1.1.3)
      redis (>= 2.2.0)

PLATFORMS
  ruby

DEPENDENCIES
  rack-attack!
  redis-activesupport

Procfile

web: bundle exec rackup config.ru -p $PORT