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Example of CASL integration in expressjs app

Read CASL in Expressjs app for details.

CASL is an isomorphic authorization JavaScript library which restricts what resources a given user is allowed to access.

This is an example API which shows how integrate CASL in blog application. There are 3 entities:

  • User
  • Post
  • Comment

Permission logic (i.e., abilities) are define in src/modules/auth/abilities.js. Rules can be specified for authenticated and anonymous users, so potentially it's quite easy to give access to anonymous users to write comments.

Application uses passport-jwt for authentication. The main logic is built on top of modules, all in src/modules.

Note: refactored to use CASL 4.0. See @casl/ability and @casl/mongoose for details. Warning: this code is just an example and doesn't follow best practices everywhere (e.g. it stores passwords without hashing).

Installation

git clone https://github.com/stalniy/casl-express-example.git
cd casl-express-example
npm install
npm start # `npm run dev` to run in dev mode

Also you need mongodb database up and running. Application will connect to mongodb://localhost:27017/blog. This repository contains database fixtures which you can load using mongorestore cli command. Navigate to the project root and run:

mongorestore db

Instruction to login

  1. Create new user
POST http://localhost:3000/api/users
{
   "email": "[email protected]",
   "password": "password"
}
  1. Create new session
POST http://localhost:3000/api/session
{
  "email": "[email protected]",
  "password": "123456"
}

201 Created
{ "token": "...." }
  1. Put access token in Authorization header for all future requests

Routes

  • /api/articles
  • /api/articles/:id/comments
  • /api/users
  • /api/session

There are 3 users available: