Node-Casbin
**News**: still worry about how to write the correct `node-casbin` policy? [Casbin online editor](http://casbin.org/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](https://wikipedia.org/wiki/Computer_security_model).
## All the languages supported by Casbin:
| [](https://github.com/casbin/casbin) | [](https://github.com/casbin/jcasbin) | [](https://github.com/casbin/node-casbin) | [](https://github.com/php-casbin/php-casbin) |
| -------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |
| [Casbin](https://github.com/casbin/casbin) | [jCasbin](https://github.com/casbin/jcasbin) | [node-Casbin](https://github.com/casbin/node-casbin) | [PHP-Casbin](https://github.com/php-casbin/php-casbin) |
| production-ready | production-ready | production-ready | production-ready |
| [](https://github.com/casbin/pycasbin) | [](https://github.com/casbin-net/Casbin.NET) | [](https://github.com/casbin/casbin-cpp) | [](https://github.com/casbin/casbin-rs) |
| ---------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------- |
| [PyCasbin](https://github.com/casbin/pycasbin) | [Casbin.NET](https://github.com/casbin-net/Casbin.NET) | [Casbin-CPP](https://github.com/casbin/casbin-cpp) | [Casbin-RS](https://github.com/casbin/casbin-rs) |
| production-ready | production-ready | beta-test | production-ready |
## Documentation
https://casbin.org/docs/overview
## Installation
```shell script
# 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](#official-model) section for details:
```node.js
// 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](#policy-persistence) section for details.
Add an enforcement hook into your code right before the access happens:
```node.js
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.js
const roles = await enforcer.getRolesForUser('alice');
```
See [Policy management APIs](#policy-management) for more usage.
## Policy management
Casbin provides two sets of APIs to manage permissions:
- [Management API](https://casbin.org/docs/management-api): the primitive API that provides full support for Casbin policy management.
- [RBAC API](https://casbin.org/docs/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.org/docs/supported-models
## Policy persistence
https://casbin.org/docs/adapters
## Policy consistence between multiple nodes
https://casbin.org/docs/watchers
## Role manager
https://casbin.org/docs/role-managers
## Contributors
This project exists thanks to all the people who contribute.
## Backers
Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/casbin#backer)]
## Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/casbin#sponsor)]
## License
This project is licensed under the [Apache 2.0 license](LICENSE).
## Contact
If you have any issues or feature requests, please contact us. PR is welcomed.
- https://github.com/casbin/node-casbin/issues
- hsluoyz@gmail.com
- Tencent QQ group: [546057381](//shang.qq.com/wpa/qunwpa?idkey=8ac8b91fc97ace3d383d0035f7aa06f7d670fd8e8d4837347354a31c18fac885)