如何在MongoDB函数中设置http会话cookies？

const express = require('express');
const { MongoClient } = require('mongodb');

const app = express();

// MongoDB连接URI和数据库名称
const uri = 'mongodb://localhost:27017';
const dbName = 'mydb';

// 设置HTTP会话cookies的路由处理程序
app.get('/set-cookie', async (req, res) => {
  try {
    // 连接到MongoDB
    const client = await MongoClient.connect(uri);
    const db = client.db(dbName);

    // 查询会话信息
    const session = await db.collection('sessions').findOne({ userId: req.query.userId });

    // 设置会话ID的cookie
    res.setHeader('Set-Cookie', 'sessionId=' + session.sessionId);

    // 关闭数据库连接
    client.close();

    // 发送响应
    res.send('Session cookie set successfully.');
  } catch (error) {
    console.error(error);
    res.status(500).send('Internal Server Error');
  }
});

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