如何在node js中改变授权(权限)级别

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

const app = express();

// 配置权限规则
acl.config({
  filename: 'nacl.json',
  baseUrl: '/',
  path: 'config',
  decodedObjectName: 'user',
  roleSearchPath: 'user.role',
});

// 应用权限中间件
app.use(acl.authorize);

// 定义路由和处理程序
app.get('/', (req, res) => {
  res.send('Hello World!');
});

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

{
  "guest": {
    "can": ["read"]
  },
  "user": {
    "can": ["read", "write"]
  },
  "admin": {
    "can": ["read", "write", "delete"]
  }
}

app.get('/admin', (req, res) => {
  if (req.acl.hasPermission('admin')) {
    // 执行需要管理员权限的操作
    res.send('Admin Dashboard');
  } else {
    res.status(403).send('Forbidden');
  }
});