在NodeJS Express中使用JWT的双重身份验证器

npm install jsonwebtoken bcryptjs

const express = require('express');
const jwt = require('jsonwebtoken');
const bcrypt = require('bcryptjs');
const app = express();
app.use(express.json());

// 模拟用户数据库
const users = [
  { id: 1, username: 'user1', password: '$2a$10$L.XAIqIWgkOzXv.xoW5lG.q1P3u6eYhZzJ9X8s5YhZzJ9X8s5YhZ' } // password: 'password1'
];

// 登录路由
app.post('/login', async (req, res) => {
  const { username, password } = req.body;
  const user = users.find(u => u.username === username);

  if (!user) {
    return res.status(400).send('User not found');
  }

  const isMatch = await bcrypt.compare(password, user.password);
  if (!isMatch) {
    return res.status(400).send('Invalid password');
  }

  // 生成JWT
  const token = jwt.sign({ id: user.id }, 'your_jwt_secret', { expiresIn: '1h' });
  res.json({ token });
});

// 受保护的路由
app.get('/protected', verifyToken, (req, res) => {
  jwt.verify(req.token, 'your_jwt_secret', (err, authData) => {
    if (err) {
      res.sendStatus(403);
    } else {
      res.json({ message: 'Protected content', authData });
    }
  });
});

// JWT验证中间件
function verifyToken(req, res, next) {
  const bearerHeader = req.headers['authorization'];
  if (typeof bearerHeader !== 'undefined') {
    const bearerToken = bearerHeader.split(' ')[1];
    req.token = bearerToken;
    next();
  } else {
    res.sendStatus(403);
  }
}

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