从$request获取请求的中间件列表？

const express = require('express');
const app = express();

// 定义中间件
const middleware1 = (req, res, next) => {
  console.log('Middleware 1');
  next();
};

const middleware2 = (req, res, next) => {
  console.log('Middleware 2');
  next();
};

// 注册中间件
app.use(middleware1);
app.use(middleware2);

// 路由处理程序
app.get('/', (req, res) => {
  // 从$request获取中间件列表
  const middlewareList = req.app._router.stack.filter(layer => layer.route === undefined).map(layer => layer.name);
  console.log('中间件列表:', middlewareList);
  res.send('Hello World');
});

// 启动服务器
app.listen(3000, () => {
  console.log('Server started on port 3000');
});