Rack::Callbacks

rackattack.rb

class TimeZone
  def initialize(default)
    @default = default
  end

  def call(env)
    env['rack.timezone'] = find_timezone(env) || @default
  end
end

class CompressBody
  def call(response)
    status, headers, body = response

    compressed_body = zip_body(body)
    [status, headers, compressed_body]
  end
end

app = Rack::Callbacks.new do
  before TimeZone, "default"

  run YourPrimaryRackApp.new

  after CompressBody
end

run app