NodeRateGuard
node-traffic-shield is a simple, memory-based rate limiting middleware for Node.js applications. It's designed to protect your Node.js and Express.js applications from excessive and potentially harmful traffic by limiting the number of requests a client can make in a given time frame.
Features
- Easy to integrate with Express.js applications.
- Memory-based rate limiting, no external dependencies required.
- Configurable rate limits and time windows.
- Helps protect against brute-force attacks, DDoS attacks, and other forms of excessive request rates.
Installation
Install NodeRateGuard via npm:
npm install node-traffic-shield
Usage
To use NodeRateGuard, import it into your Express.js application and apply it as middleware. You can apply it globally or to specific routes.
Basic Usage
Here's how to set up node-traffic-shield with default settings for a simple Express.js application:
const express = require('express');
const rateLimiter = require('node-traffic-shield');
const app = express();
// Apply the rate limiter middleware
app.use(rateLimiter({
limit: 100, // Maximum number of requests per IP within the windowMs period
windowMs: 15 * 60 * 1000 // Time window in milliseconds (here, 15 minutes)
}));
app.get('/', (req, res) => {
res.send('Hello, World!');
});
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});
NestJS
In NestJS, wrap the middleware in a class that implements NestMiddleware
.
Create a Middleware Wrapper
// rateLimiter.middleware.ts
import { Injectable, NestMiddleware } from '@nestjs/common';
import { Request, Response, NextFunction } from 'express';
const rateLimiter = require('node-traffic-shield');
@Injectable()
export class RateLimiterMiddleware implements NestMiddleware {
use(req: Request, res: Response, next: NextFunction) {
return rateLimiter({ limit: 100, windowMs: 15 * 60 * 1000 })(req, res, next);
}
}
Apply Middleware in a NestJS Module
In your NestJS module (e.g., app.module.ts
), apply the middleware using the configure
method of the module class. Here's an example:
// app.module.ts
import { Module, MiddlewareConsumer, RequestMethod } from '@nestjs/common';
import { RateLimiterMiddleware } from './rateLimiter.middleware';
@Module({
// ... other module settings
})
export class AppModule {
configure(consumer: MiddlewareConsumer) {
consumer
.apply(RateLimiterMiddleware)
.forRoutes({ path: '*', method: RequestMethod.ALL });
}
}
Configuration Options
-
limit
: The maximum number of requests allowed per IP within thewindowMs
timeframe. Default is 100. -
windowMs
: The time frame for checking the request count in milliseconds. Default is 900000 ms (15 minutes).
Contributing
Contributions, issues, and feature requests are welcome! Feel free to check issues page.
Support
If you have any questions or issues, please open an issue on the GitHub repository.
License
This project is licensed under the MIT License - see the LICENSE file for details.