express-request-limiter

Express request-limiter

Request limiting middleware for Express applications

npm install express-request-limiter --save

Usage

Globally on application

var express = require('express');
var RequestLimiter = require('express-request-limiter');
 
var app = express();
 
const requestLimiter = RequestLimiter({
    maxRequests: 10,
    headers: true,
    routesList: [{ path: '/api/first', method: 'GET' }, { path: '/api/second', method: 'PUT' }],
});
 
app.use(requestLimiter);
 
 
app.get('/api/first', function (req, res) {
  res.send(200, 'ok')
})

Separately on each route

var express = require('express');
var RequestLimiter = require('express-request-limiter');
 
var app = express();
 
const requestLimiter = RequestLimiter({
    maxRequests: 10,
    global: false,
    headers: true
});
 
 
``` js
app.get('/user/first', requestLimiter, function (req, res) {
    // request logic
    ...
})

API options

RequestLimiter(options)

• maxRequests: Number the number of maximum concurrent requests at a time. Default to 10.
• routesList: Array the list of objects that are specify router path and method which are will be monitored.
• routesList.path: String router path.
• routesList.method: String request method.
• global: Boolean the flag that is indicates do the limiter will be global or local for an application. Default to true.
• headers: Boolean the flag that enable headers for request limit (X-RequestLimit-Limit) and current usage (X-RequestLimit-Usage) on all responses. Default to true.
• message: String the error message sent to user when maxRequests is exceeded. Defaults to 'Too many requests, please try again later.'
• statusCode: Number HTTP status code returned when maxRequests is exceeded. Defaults to 429.
• skip: Function the function used to skip (whitelist) requests. Returning true from the function will skip limiting for that request. Defaults to always false (count all requests):

 function (/*req, res*/) {
    return false;
 }

• handler: The function to handle requests once the maxRequests limit is exceeded. It receives the request and the response objects. The "next" param is available if you need to pass to the next middleware.

Defaults to:

function (req, res, /*next*/) {
    res.status(options.statusCode).send(options.message);
}

• onRateLimited: Function called when a request exceeds the configured rate limit.

License MIT

MIT © Iaroslav Zhbankov