module Rack
  class StaticApp
    def call(env)
      path = env["REQUEST_PATH"]

      file_path = ::File.join(::File.dirname(__FILE__), "public", path)
      ::File.exist?(file_path) ?
        [200, {}, ::File.new(file_path, "r")] :
        [404, {}, ""]
    end
  end
end