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https://github.com/node-casbin/koa-authz
koa-authz is an authorization middleware for Koa2 based on Casbin
https://github.com/node-casbin/koa-authz
authorization casbin koa2 koajs middleware node-casbin
Last synced: 3 months ago
JSON representation
koa-authz is an authorization middleware for Koa2 based on Casbin
- Host: GitHub
- URL: https://github.com/node-casbin/koa-authz
- Owner: node-casbin
- License: apache-2.0
- Created: 2018-08-09T03:18:48.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2023-07-06T15:00:44.000Z (over 1 year ago)
- Last Synced: 2024-10-16T10:31:06.714Z (3 months ago)
- Topics: authorization, casbin, koa2, koajs, middleware, node-casbin
- Language: JavaScript
- Homepage: https://casbin.org/
- Size: 612 KB
- Stars: 40
- Watchers: 4
- Forks: 14
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
- awesome-koa - koa-authz - 用于Koa2，基于Casbin的授权中间件。   (仓库 / 中间件)
README
Koa-Authz
====
[![NPM version][npm-image]][npm-url]
[![NPM download][download-image]][download-url]
[](https://codebeat.co/projects/github-com-node-casbin-koa-authz-master)
[](https://travis-ci.org/node-casbin/koa-authz)
[](https://coveralls.io/github/node-casbin/koa-authz?branch=master)
[](https://discord.gg/S5UjpzGZjN)
[npm-image]: https://img.shields.io/npm/v/koa-authz.svg?style=flat-square
[npm-url]: https://npmjs.org/package/koa-authz
[download-image]: https://img.shields.io/npm/dm/koa-authz.svg?style=flat-square
[download-url]: https://npmjs.org/package/koa-authz
Koa-Authz is an authorization middleware for [Koa](https://github.com/koajs/koa), it's based on ``Node-Casbin``: [https://github.com/casbin/node-casbin](https://github.com/casbin/node-casbin).
## Installation
### use casbin v2.x
```shell
npm install casbin@2 koa-authz@2 --save
```
### use casbin v3.x
```shell
npm install casbin@3 koa-authz@3 --save
```
## Simple Example
```js
const casbin = require('casbin')
const Koa = require('koa')
const app = new Koa()
const authz = require('koa-authz')
// response
app.use(async (ctx, next) => {
const start = new Date()
await next()
console.log(new Date() - start)
})
// use authz middleware
app.use(authz({
newEnforcer: async() => {
// load the casbin model and policy from files, database is also supported.
const enforcer = await casbin.newEnforcer('authz_model.conf', 'authz_policy.csv')
return enforcer
}
}))
// reload routes
const router = require('koa-router')({prefix: '/user'})
router.get('/', (ctx) => {
ctx.body = {name: 'Chalin', age: 26}
})
router.put('/', (ctx) => {
ctx.body = {status: 'success'}
})
app.use(router.routes(), router.allowedMethods())
app.listen(3000)
```
## Use a customized authorizer
This package provides ``BasicAuthorizer``, it uses ``HTTP Basic Authentication`` as the authentication method.
If you want to use another authentication method like OAuth, you needs to extends ``BasicAuthorizer`` as below:
```js
class MyAuthorizer extends BasicAuthorizer {
// override function
getUserName () {
const { username } = this.ctx.state.user
return username
}
}
app.use(authz({
newEnforcer: async () => {
// load the casbin model and policy from files, database is also supported.
const enforcer = await casbin.newEnforcer('examples/authz_model.conf', 'examples/authz_policy.csv')
return enforcer
},
authorizer: (ctx, option) => new MyAuthorizer(ctx, option)
}))
```
## How to control the access
The authorization determines a request based on ``{subject, object, action}``, which means what ``subject`` can perform what ``action`` on what ``object``. In this plugin, the meanings are:
1. ``subject``: the logged-on user name
2. ``object``: the URL path for the web resource like "dataset1/item1"
3. ``action``: HTTP method like GET, POST, PUT, DELETE, or the high-level actions you defined like "read-file", "write-blog"
For how to write authorization policy and other details, please refer to [the Casbin's documentation](https://casbin.org).
## Getting Help
- [Node-Casbin](https://github.com/casbin/node-casbin)
## License
This project is licensed under the [Apache 2.0 license](LICENSE).