FileShare: P2P File Sharing System

A high-performance, secure, and Peer-to-Peer (P2P) file sharing system using WebRTC for direct client-to-client transfers and AWS Lambda with Redis for signaling.

Project Overview

FileShare consists of a modern React/Next.js frontend and a serverless Java-based signaling backend. It allows users to share files by simply sharing a PIN, establishing a peer-to-peer connection for faster and private data transfer.

🏗️ Architecture

The system follows a WebRTC-based architecture:

1. Signaling Server (Backend): Handles user registration, PIN generation, and WebRTC handshake (offer/answer/ice candidates).
2. Sender Client: Initiates the share, generates a PIN, and waits for a receiver.
3. Receiver Client: Enters the PIN, connects to the sender, and receives the file in chunks.
4. Data Transfer: Once connected, files are transferred directly between browsers via RTCDataChannel.

📁 Repository Structure

.
├── fileshare-frontend/    # Next.js Frontend (React, TypeScript, TailwindCSS)
├── fileshare-backend/     # AWS Lambda Signaling Server (Java, Spring Boot, Redis)

🚀 Getting Started

Prerequisites

• Node.js (v18 or higher)
• Java 17+ and Maven (for backend)
• Redis instance (for backend signaling)

Development Setup

Frontend

1. Navigate to fileshare-frontend:

   cd fileshare-frontend
   npm install
   npm run dev

2. Open http://localhost:3000.

Backend

1. Navigate to fileshare-backend:

   cd fileshare-backend
   mvn install

2. Deploy as an AWS Lambda or run locally with appropriate environment variables for Redis and API Gateway.

⚖️ Features

• P2P Transfer: Direct browser-to-browser transfer (WebRTC).
• No File Size Limits: Files are streamed in chunks.
• PIN-based Pairing: Simple 6-digit PIN for session discovery.
• Serverless Backend: Scalable signaling using AWS Lambda.
• Modern UI: Slick dark-themed interface built with Next.js.

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For more detailed technical information, see ARCHITECTURE.md.