在会话数组中存储、显示和删除项

const express = require('express');
const session = require('express-session');

const app = express();

app.use(session({
  secret: 'your_secret_key',
  resave: false,
  saveUninitialized: true
}));

app.get('/store', (req, res) => {
  req.session.items = req.session.items || [];
  req.session.items.push('new item');
  res.send('Item stored in session');
});

app.listen(3000, () => {
  console.log('Server started on port 3000');
});

app.get('/display', (req, res) => {
  const items = req.session.items || [];
  res.send(`Items in session: ${items.join(', ')}`);
});

app.get('/delete', (req, res) => {
  if (req.session.items && req.session.items.length > 0) {
    req.session.items.splice(0, req.session.items.length); // 清空数组
  }
  res.send('Items deleted from session');
});