Node-Casbin

News: still worry about how to write the correct node-casbin policy? Casbin online editor is coming to help!

node-casbin is a powerful and efficient open-source access control library for Node.JS projects. It provides support for enforcing authorization based on various access control models.

All the languages supported by Casbin:


Casbin	jCasbin	node-Casbin	PHP-Casbin
production-ready	production-ready	production-ready	production-ready


PyCasbin	Casbin.NET	Casbin-CPP	Casbin-RS
production-ready	production-ready	beta-test	production-ready

Documentation

https://casbin.apache.org/docs/overview

Installation

shell
# NPM
npm install casbin --save

# Yarn
yarn add casbin

Get started

New a node-casbin enforcer with a model file and a policy file, see Model section for details:

node
// For Node.js:
const { newEnforcer } = require('casbin');
// For browser:
// import { newEnforcer } from 'casbin';

const enforcer = await newEnforcer('basic_model.conf', 'basic_policy.csv');

Note: you can also initialize an enforcer with policy in DB instead of file, see Persistence section for details.

Add an enforcement hook into your code right before the access happens:

node
const sub = 'alice'; // the user that wants to access a resource.
const obj = 'data1'; // the resource that is going to be accessed.
const act = 'read'; // the operation that the user performs on the resource.

// Async:
const res = await enforcer.enforce(sub, obj, act);
// Sync:
// const res = enforcer.enforceSync(sub, obj, act);

if (res) {
  // permit alice to read data1
} else {
  // deny the request, show an error
}

Besides the static policy file, node-casbin also provides API for permission management at run-time.
For example, You can get all the roles assigned to a user as below:

node
const roles = await enforcer.getRolesForUser('alice');

See Policy management APIs for more usage.

Policy management

Casbin provides two sets of APIs to manage permissions:

Management API: the primitive API that provides full support for Casbin policy management.
RBAC API: a more friendly API for RBAC. This API is a subset of Management API. The RBAC users could use this API to simplify the code.

Official Model

https://casbin.apache.org/docs/supported-models

Policy persistence

https://casbin.apache.org/docs/adapters

Policy consistence between multiple nodes

https://casbin.apache.org/docs/watchers

Role manager

https://casbin.apache.org/docs/role-managers

Contributors

This project exists thanks to all the people who contribute.
<a href="https://github.com/apache/casbin-node-casbin/graphs/contributors"><img src="https://opencollective.com/node-casbin/contributors.svg?width=890&button=false" /></a>