Nodal Rate Limit Middleware

This is a middleware package for Nodal that performs basic rate-limiting on public endpoints. This is intentionally a very simplistic piece of middleware that does not share any state.

DO NOT USE THIS YET

This module, while totally functional, has hardcoded options. Until PR #149 on the main Nodal repo is merged. The module currently allows 100 connections per minute per ip. Localhost (::1 in Nodal) is also intentionally not excluded to allow for testing.

Install

$ npm install --save nodal-middleware-ratelimit

Useage

In your app/app.js you first need to require the module

const RateLimitMiddleware = require('@intabulas/nodal-middleware-ratelimit');

Then simply use it

this.middleware.use(RateLimitMiddleware)

Headers

This middleware currently sets the following headers

Name	Description
X-RateLimit-Limit	Request limit per minute
X-RateLimit-Remaining	The number of requests left for the time window
X-Rate-Limit-Reset	Timestamp of when the limit will be reset

Error Messages

When the limit is reach, the middleware will return a HTTP Too Many Request (429) response and the body will be a JSON document. The error key in the document will look like the following

{
  "error":{
    "message": "Too many requests, please try again later.",
    "details": {
      "host": "::1",
      "maximum": 20,
      "requests": 22,
      "resets":" 2016-01-27T03:58:48.072Z"
    }
  }
}