Peran dan izin pengguna Express.js/Mongoose

Saya telah menemukan solusi. Akan sangat menyenangkan mendengar pendapat orang tentang ini.

Saya memiliki objek konfigurasi izin yang mendefinisikan setiap peran dan izinnya.

Izin mengonfigurasi objek

roles.admin = {
    id: "admin",
    name: "Admin",
    description: "",
    resource : [
        {
            id : 'blog', 
            permissions: ['create', 'read', 'update', 'delete']
        },
        {
            id : 'user',
            permissions: ['create', 'read', 'update', 'delete']
        },
        {
            id : 'journal',
            permissions: ['create', 'read', 'update', 'delete']
        },

    ]
};

roles.editor = {
    id: "editor",
    name: "Editor",
    description: "",
    resource : [
        {
            id : 'blog', 
            permissions: ['create', 'read', 'update', 'delete']
        },
        {
            id : 'user',
            permissions: ['read']
        },
        {
            id : 'journal',
            permissions: ['create', 'read', 'update']
        },

    ]
};

Fungsi perangkat tengah

var roles = require('./config');


var permissions = (function () {

  var getRoles = function (role) {

    var rolesArr = [];

    if (typeof role === 'object' && Array.isArray(role)) {

        // Returns selected roles   
        for (var i = 0, len = role.length; i < len; i++) {
            rolesArr.push(roles[role[i]]);
        };
        return rolesArr;

    } else if (typeof role === 'string' || !role) {

        // Returns all roles
        if (!role) {
            for (var role in roles) {
                rolesArr.push(roles[role]);
            };
        }   

        // Returns single role
        rolesArr.push(roles[role]);
        return rolesArr;

    }

},
check = function (action, resource, loginRequired) {

    return function(req, res, next) {

        var isAuth = req.isAuthenticated();

        // If user is required to be logged in & isn't
        if (loginRequired  && !isAuth) {
            return next(new Error("You must be logged in to view this area"));
        }

        if (isAuth || !loginRequired) {

            var authRole = isAuth ? req.user.role : 'user', 
                role =  get(authRole),
                hasPermission = false;

            (function () {
                for (var i = 0, len = role[0].resource.length; i < len; i++){
                    if (role[0].resource[i].id === resource && role[0].resource[i].permissions.indexOf(action) !== -1) {
                        hasPermission = true;
                        return;
                    }
                };
            })();

            if (hasPermission) {
                next();
            } else {
                return next(new Error("You are trying to " + action + " a " + resource + " and do not have the correct permissions."));
            }

        }
    }
}

return {
    get : function (role) {

        var roles = getRoles(role);

        return roles;
    },
    check : function (action, resource, loginRequired) {
        return check(action, resource, loginRequired);
    }
}

})();

module.exports = permissions;

Kemudian saya membuat fungsi middleware, ketika memeriksa metode dipanggil itu mendapatkan peran pengguna dari req objek (req.user.role). Itu kemudian melihat params yang diteruskan ke middleware dan referensi silang mereka dengan yang ada di objek konfigurasi izin.

Rute dengan middlware

app.get('/journal', `**permissions.check('read', 'journal')**`, function (req, res) {
     // do stuff
};