nodejs acl的用户权限管理详解

const Acl = require('acl');
const aclConfig = require('../conf/acl_conf');

module.exports = function (app, express) {
  const acl = new Acl(new Acl.memoryBackend()); // eslint-disable-line

  acl.allow(aclConfig);

  return acl;
};

// acl_conf

module.exports = [
  {
    roles: 'normal', // 一般用户
    allows: [
      { resources: ['/admin/reserve'], permissions: ['get'] },
    ]
  },
  {
    roles: 'member', // 会员
    allows: [
      { resources: ['/admin/reserve', '/admin/sign'], permissions: ['get'] },
      { resources: ['/admin/reserve/add-visitor', '/admin/reserve/add-visitor-excel', '/admin/reserve/audit', '/admin/sign/ban'], permissions: ['post'] },
    ]
  },
  {
    roles: 'admin',  // 管理
    allows: [
      { resources: ['/admin/reserve', '/admin/sign', '/admin/set'], permissions: ['get'] },
      { resources: ['/admin/set/add-user', '/admin/set/modify-user'], permissions: ['post'] },
    ]
  },
  {
    roles: 'root', // 最高权限
    allows: [
      { resources: ['/admin/reserve', '/admin/sign', '/admin/set'], permissions: ['get'] },
    ]
  }
];

function auth() {
    return async function (req, res, next) {
      let resource = req.baseUrl;
      if (req.route) { // 正常在control中使用有route属性 但是使用app.use则不会有
        resource = resource + req.route.path;
      }
      console.log('resource', resource);

      // 容错 如果访问的是 /admin/sign/ 后面为 /符号认定也为过
      if (resource[resource.length - 1] === '/') {
        resource = resource.slice(0, -1);
      }

      let role = await acl.hasRole(req.session.userName, 'root');

      if (role) {
        return next();
      }

      let result = await acl.isAllowed(req.session.userName, resource, req.method.toLowerCase());
      // if (!result) {
      //   let err = {
      //     errorCode: 401,
      //     message: '用户未授权访问',
      //   };
      //   return res.status(401).send(err.message);
      // }
      next();
    };
  }

let roleName = 'normal';

  switch (result.result.privilege) {
    case 0:
      roleName = 'admin';
      break;
    case 1:
      roleName = 'normal';
      break;
    case 2:
      roleName = 'member';
      break;
  }

  if (result.result.name === 'Nathan') {
    roleName = 'root';
  }

  req.session['role'] = roleName;
  // req.session['role'] = 'root';  // test
  acl.addUserRoles(result.result.name, roleName);
  // acl.addUserRoles(result.result.name, 'root'); // test

app.locals.hasRole = function (userRole, path, method = 'get') {

  if (userRole === 'root') {
    return true;
  }

  const current = aclConf.find((n) => {
    return n['roles'] === userRole;
  });

  let isFind = false;
  for (let i of current.allows) {
    const currentPath = i.resources; // 目前数组第一个为单纯的get路由
    isFind = currentPath.includes(path);

    if (isFind) {
      // 如果找到包含该路径 并且method也对应得上 那么则通过
      if (i.permissions.includes(method)) {
        break;
      }

      // 如果找到该路径 但是method对应不上 则继续找.
      continue;
    }
  }

  return isFind;
};

if hasRole(user.role, '/admin/reserve/audit', 'post')
          .col.l3.right-align
            a.waves-effect.waves-light.btn.margin-right.blue.font12.js-reviewe-ok 同意
            a.waves-effect.waves-light.btn.pink.accent-3.font12.js-reviewe-no 拒绝

const hasBtn1Role = hasRole(user.role, '/xxx','get');
res.render('a.pug',{hasBtn1Role})