js session用法

// 存储数据
sessionStorage.setItem('username', 'JohnDoe');

// 获取数据
const username = sessionStorage.getItem('username');
console.log(username); // 输出: JohnDoe

// 移除数据
sessionStorage.removeItem('username');

// 清空所有数据
sessionStorage.clear();

// 设置cookie
document.cookie = "username=JohnDoe; expires=Thu, 18 Dec 2023 12:00:00 UTC; path=/";

// 获取cookie
function getCookie(name) {
  const value = `; ${document.cookie}`;
  const parts = value.split(`; ${name}=`);
  if (parts.length === 2) return parts.pop().split(';').shift();
}

const username = getCookie('username');
console.log(username); // 输出: JohnDoe

// 移除cookie
document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/";

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

const app = express();

app.use(session({
  secret: 'secret-key',
  resave: false,
  saveUninitialized: true,
  cookie: { secure: false } // 设置为true如果使用HTTPS
}));

app.get('/', (req, res) => {
  if (!req.session.views) {
    req.session.views = 0;
  }
  req.session.views++;
  res.send(`Views: ${req.session.views}`);
});

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