class ActionDispatch::Static

def call(env)
  case env['REQUEST_METHOD']
  when 'GET', 'HEAD'
    path = env['PATH_INFO'].chomp('/')
    if match = @file_handler.match?(path)
      env["PATH_INFO"] = match
      return @file_handler.call(env)
    end
  end
  @app.call(env)
end

def initialize(app, path, cache_control=nil)
  @app = app
  @file_handler = FileHandler.new(path, cache_control)
end