new

# File actionpack/lib/action_dispatch/middleware/static.rb, line 16
    def initialize(root, cache_control)
      @root          = root.chomp('/')
      @compiled_root = /^#{Regexp.escape(root)}/
      headers        = cache_control && { 'Cache-Control' => cache_control }
      @file_server = ::Rack::File.new(@root, headers)
    end