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Status](https://travis-ci.org/node-casbin/koa-authz.svg?branch=master)](https://travis-ci.org/node-casbin/koa-authz)\n[![Coverage Status](https://coveralls.io/repos/github/node-casbin/koa-authz/badge.svg?branch=master)](https://coveralls.io/github/node-casbin/koa-authz?branch=master)\n[![Discord](https://img.shields.io/discord/1022748306096537660?logo=discord\u0026label=discord\u0026color=5865F2)](https://discord.gg/S5UjpzGZjN)\n\n[npm-image]: https://img.shields.io/npm/v/koa-authz.svg?style=flat-square\n[npm-url]: https://npmjs.org/package/koa-authz\n[download-image]: https://img.shields.io/npm/dm/koa-authz.svg?style=flat-square\n[download-url]: https://npmjs.org/package/koa-authz\n\nKoa-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).\n\n## Installation\n### use casbin v2.x\n```shell\nnpm install casbin@2 koa-authz@2 --save\n```\n\n### use casbin v3.x\n```shell\nnpm install casbin@3 koa-authz@3 --save\n```\n\n## Simple Example\n\n```js\nconst casbin = require('casbin')\nconst Koa = require('koa')\nconst app = new Koa()\nconst authz = require('koa-authz')\n\n// response\napp.use(async (ctx, next) =\u003e {\n  const start = new Date()\n  await next()\n  console.log(new Date() - start)\n})\n\n// use authz middleware\napp.use(authz({\n  newEnforcer: async() =\u003e {\n    // load the casbin model and policy from files, database is also supported.\n    const enforcer = await casbin.newEnforcer('authz_model.conf', 'authz_policy.csv')\n    return enforcer\n  }\n}))\n\n// reload routes\nconst router = require('koa-router')({prefix: '/user'})\nrouter.get('/', (ctx) =\u003e {\n  ctx.body = {name: 'Chalin', age: 26}\n})\nrouter.put('/', (ctx) =\u003e {\n  ctx.body = {status: 'success'}\n})\napp.use(router.routes(), router.allowedMethods())\n\napp.listen(3000)\n```\n\n## Use a customized authorizer\n\nThis package provides ``BasicAuthorizer``, it uses ``HTTP Basic Authentication`` as the authentication method.\nIf you want to use another authentication method like OAuth, you needs to extends ``BasicAuthorizer`` as below:\n\n```js\nclass MyAuthorizer extends BasicAuthorizer {\n  // override function\n  getUserName () {\n    const { username } = this.ctx.state.user\n    return username\n  }\n}\n\napp.use(authz({\n  newEnforcer: async () =\u003e {\n    // load the casbin model and policy from files, database is also supported.\n    const enforcer = await casbin.newEnforcer('examples/authz_model.conf', 'examples/authz_policy.csv')\n    return enforcer\n  },\n  authorizer: (ctx, option) =\u003e new MyAuthorizer(ctx, option)\n}))\n```\n\n## How to control the access\n\nThe 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:\n\n1. ``subject``: the logged-on user name\n2. ``object``: the URL path for the web resource like \"dataset1/item1\"\n3. ``action``: HTTP method like GET, POST, PUT, DELETE, or the high-level actions you defined like \"read-file\", \"write-blog\"\n\n\nFor how to write authorization policy and other details, please refer to [the Casbin's documentation](https://casbin.org).\n\n## Getting Help\n\n- [Node-Casbin](https://github.com/casbin/node-casbin)\n\n## License\n\nThis project is licensed under the [Apache 2.0 license](LICENSE).\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fapache%2Fcasbin-node-casbin-koa-authz","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fapache%2Fcasbin-node-casbin-koa-authz","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fapache%2Fcasbin-node-casbin-koa-authz/lists"}