{“message”：“请求中包含的安全令牌无效。”}

// 示例代码：检查JWT令牌有效期
function isTokenExpired(token) {
    const decodedToken = jwtDecode(token);
    const currentTime = Math.floor(Date.now() / 1000);
    return decodedToken.exp < currentTime;
}

if (isTokenExpired(token)) {
    // 重新获取令牌
    const newToken = getTokenFromServer();
    // 更新客户端令牌
    token = newToken;
}

// 示例代码：生成JWT令牌
const token = jwt.sign({ userId: 123 }, 'your-secret-key', { expiresIn: '1h' });

// 示例代码：服务器端验证JWT令牌
app.use((req, res, next) => {
    const token = req.headers['authorization'];
    if (!token) return res.status(403).send('A token is required for authentication');
    try {
        const decoded = jwt.verify(token, 'your-secret-key');
        req.user = decoded;
    } catch (err) {
        return res.status(401).send('Invalid Token');
    }
    return next();
});