Express Route Keeper

Important! This project is in development, README.md is draft API.

This project is a route middleware for acls and parameter checker.

Installation

npm i express-route-keeper

Usage

import express from 'express';
import bodyParser from 'body-parser';
import RouteKeeper from 'express-route-keeper';
 
const app = express();
const keeper = RouteKeeper();
 
const READ_PROJECT = Symbol('READ_PROJECT');
const CREATE_PROJECT = Symbol('CREATE_PROJECT');
const PROJECT_MASTER = Symbol('PROJECT_MASTER');
 
// middleware for request body parse
app.use(bodyParser.urlencoded({
  extended: true,
}));
app.use(bodyParser.json());
 
// acl role injection
app.use((req, res, next) => {
  req.aclActions = [
    READ_PROJECT,
    CREATE_PROJECT,
    PROJECT_MASTER
  ];
 
  next();
});
 
// public route
app.get('/news', routeHandler);
 
// acl route
app.get('/projects', keeper(READ_PROJECT), routeHandler);
app.get('/projects', keeper([
  READ_PROJECT,
  PROJECT_MASTER
]), routeHandler); // AND match
 
// parameter checker
app.post('/login', keeper({
  username: String,
  password: String,
  memorize: {
    type: Boolean,
    defaultValue: false,
    required: false,
  },
}), routeHandler);
 
// mixed mode
app.post('/projects', keeper({
  acl: [
    CREATE_PROJECT,
    PROJECT_MASTER
  ],
  name: String,
}), routeHandler);
 
app.listen(PORT);

ACL OR match

app.post('/projects', ({
  acl: {
    actions: [
      CREATE_PROJECT,
      PROJECT_MASTER
    ],
    $or: true,
  },
  name: String,
}), routeHandler);

Working with other middleware

// General Usage
// Check ACL before uploaded file handler
app.post('/projects', keeper(CREATE_PROJECT), multer.single('cover'), routeHandler);
 
// Body field checker with multipart
app.post('/projects', multer.single('cover'), keeper({
  name: String,
  managerId: Number,
  acl: [
    CREATE_PROJECT
  ],
}), routeHandler);

Set custom exception

import RouteKeeper, {
  PARAMS_ERROR,
  ACL_ERROR
} from 'express-route-keeper';
 
const keeper = RouteKeeper((err, req, res) => {
  switch (err) {
    case PARAMS_ERROR:
      res.status(401);
      res.json({
        message: 'Invalid Parameter',
      });
      break;
 
    case ACL_ERROR:
      res.status(401);
      res.json({
        message: 'Authentication Failed',
      });
      break;
 
    default:
      console.error(err);
 
      res.status(500);
      res.json({
        message: 'Server Error'
      });
      break;
  }
});

Action Keys

You can use String or ES6 Symbol (Recommend) for action keys.

Querystring or Body

If request method is GET, check the querystring in req.query or check parameters in req.body.