Distributed Rate Limiter

A production-grade rate limiting system with 3 algorithms, a real-time monitoring dashboard, and full cloud deployment.

🔗 Live Demo — See it in action.

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✨ Features

• 3 Rate Limiting Algorithms

  • Fixed Window Counter
  • Sliding Window Log
  • Token Bucket

• Real-Time Dashboard

  • Live request tracking
  • Interactive charts
  • Algorithm metrics

• Production Ready

  • Deployed on Render (backend) + Vercel (frontend)
  • Upstash Redis for distributed caching
  • Auto-scaling, zero downtime

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🚀 Quick Start

Local Development

# Clone
git clone https://github.com/Aditya-tec/distributed-rate-limiter
cd distributed-rate-limiter

# Install dependencies
npm install

# Backend (.env)
PORT=5000
REDIS_URL=redis://localhost:6379
NODE_ENV=development

# Run backend
node src/server.js

# Run dashboard (separate terminal)
cd dashboard
npm run dev

Visit http://localhost:3000 for the dashboard.

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📊 Algorithms Explained

Algorithm	Accuracy	Use Case
Fixed Window	⚠️ Edge case spikes	Simple static limits
Sliding Window	✅ Perfect accuracy	Strict enforcement
Token Bucket	✅ Accurate + burst	API rate limiting

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🏗️ Architecture

Dashboard (Vercel)
    ↓ REST API
Backend (Render)
    ↓ Cache
Redis (Upstash)

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📚 API Endpoints

# Fixed window (5 req/30s per IP)
GET /demo/public

# Sliding window (5 req/30s per API key)
GET /demo/authenticated

# Token bucket (burst capable)
POST /demo/expensive

# Metrics & live feed
GET /admin/metrics
GET /admin/stream (SSE)

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🛠️ Tech Stack

• Backend: Node.js + Express
• Frontend: Next.js + React + Recharts
• Cache: Upstash Redis
• Services: Render, Vercel, GitHub Actions

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