node-traffic-shield

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 the windowMs 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.

node-traffic-shield