@studiowebux/security

Introduction

This module offers these features:

Query parser (req.query), initially made to work with Mongoose
Express Rate Limiter
joi validators
body parser
cookie parser
cors
Response Headers
helmet
compression
x-powered-by
trust proxy

This module is built to be use with Express.

Configuration

Key	Value	Description	More info
bodyParser	`limit` and `extended`		https://www.npmjs.com/package/body-parser
cookieParser	`secret`		https://www.npmjs.com/package/cookie-parser
cors	`whitelist` the array of URLs authorized	Use `[]` to disable the cors	https://www.npmjs.com/package/cors
server	See below, The response headers and the proxy configuration
rateLimiters	See below, An array of objects		https://www.npmjs.com/package/express-rate-limiter

Example:

const opts = {
  bodyParser: {
    limit: "1mb",
    extended: false,
  },
  cookieParser: {
    secret: process.env.COOKIE_SECRET || "CookieSecret",
  },
  cors: {
    whitelist: ["https://webuxlab.com", "http://127.0.0.1"], // or [] to disable cors
  },
  server: {
    trustProxy: true,
    allowedMethods: "GET, POST, PUT, DELETE, PATCH, OPTIONS",
    allowedCredentials: false,
    allowedHeaders:
      "Origin, X-Requested-with, Accept, Authorization, Content-Type, Accept-Language",
  },
  rateLimiters: [
    {
      name: "Authentication",
      time: 3600, // blocked for 1 hour
      maxReq: 3, // after 3 tries
      pattern: "/auth", // The route prefix to apply this limiter
    },
    {
      name: "Global",
      time: 60, // blocked for 1 minute
      maxReq: 5, // after 5 tries the requester will be blocked for 1 minute
      pattern: "", // It applies globally
    },
  ],
};

Functions

constructor(opts, log = console)

Initialize the configurations globally.

const WebuxSecurity = require("@studiowebux/security");
const Security = new WebuxSecurity(opts, console);

The opts parameter is mandatory, it configures the security module.

The log parameter allows to use a custom logger, by default it uses the console.

validators

This property has all joi based validators attached.
To access a validator, Security.validators.Body(...)

How to use a validator (Schema Definition)

For more information, please read the official joi documentation,

Examples

Schemas

const Joi = require("joi");

const Create = Joi.object()
  .keys({
    user: {
      username: Joi.string().required(),
      premium: Joi.boolean().required(),
    },
  })
  .required();

const Update = Joi.object({
  user: {
    premium: Joi.boolean().required(),
  },
}).required();

const ID = Joi.string()
  .pattern(/^[0-9]*$/)
  .required();

const Something = Joi.object({
  items: Joi.array().required(),
}).required();

Usage

app.post("/something", async (req, res) => {
  await Security.validators
    .Custom(Something, req.body)
    .then((value) => {
      return res.status(200).json({ msg: "Bonjour !" });
    })
    .catch((err) => {
      console.error(err);
      return res.status(400).json({ msg: "BAD_REQUEST", reason: err.message });
    });
});

app.post(
  "/account/:id",
  Security.validators.Id(ID),
  Security.validators.Body(Update),
  (req, res) => {
    console.info("Hello World !");
    return res.status(200).json({ msg: "Bonjour !" });
  }
);

List of validators

Where the ... is the Joi validator code. These functions will return nothing if the data is valid. Or a structured error using the errorHandler function.

Body (req.body, errorHandler = Handler)

Body(Schema)(req, res, next)=>{...};

Id (req.params.id, errorHandler = Handler)

Id(Schema)(req, res, next)=>{...};

MongoID (req.params.id, errorHandler = Handler)

MongoID(Schema)(req, res, next)=>{...};

MongoIdOrURL (req.params.id_url, errorHandler = Handler)

MongoIdOrURL(Schema)(req, res, next)=>{...};

User (req.user, errorHandler = Handler)

User(Schema)(req, res, next)=>{...};

Headers (req.headers, errorHandler = Handler)

Headers(Schema)(req, res, next)=>{...};

Files (req.files, errorHandler = Handler)

Files(Schema)(req, res, next)=>{...};

Custom (object, errorHandler = Handler)

Custom(Schema, object);

Default errorHandler Function

You can override this function,

(code, msg, extra, devMsg) => {
  let error = new Error();

  error.code = code || 500;
  error.message = msg || "";
  error.extra = extra || {};
  error.devMessage = devMsg || "";

  return error;
};

SetResponseHeader(app): Void

It loads the response headers using the res.header(...)

const express = require("express");
const app = express();

Security.SetResponseHeader(app);

The app parameter is mandatory, it is used to configure the headers.