$app
$app : \think\App
Session初始化
$app : \think\App
$session : \think\Session
__construct(\think\App $app, \think\Session $session)
| \think\App | $app | |
| \think\Session | $session |
handle(\think\Request $request, \Closure $next) : \think\Response
Session初始化
| \think\Request | $request | |
| \Closure | $next |
end(\think\Response $response)
| \think\Response | $response |