PeerConnect 🚀

A lightweight file sharing tool that supports large file uploads and downloads through a custom multithreaded HTTP server and socket-based architecture.

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🔧 Features

• Upload files up to 200MB securely
• Each file is hosted on a dedicated socket server
• Download link includes dynamic port binding
• Works for MP3, MP4, PDF, ZIP, TXT, and more
• Temporary hosting — files are served from memory/disk and auto-deleted
• No frameworks — built from scratch in Java

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🛠️ What I Implemented (Low-Level Engineering)

• ✳️ Built custom HTTP server using Java HttpServer — no Spring or frameworks used
• 🧵 Implemented multithreaded socket servers for serving each file in parallel
• 🔌 Used pure socket programming to send files byte-by-byte over TCP
• 📑 Developed a manual multipart/form-data parser to handle file uploads without external libraries
• 📂 Ensured file type independence (supports audio/video/binary) with raw stream handling
• 🐳 Containerized the full-stack app (backend + frontend) using Docker and Docker Compose

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📦 Tech Stack

Area	Tech Used
Backend	Java (JDK 21), Raw HTTP, Sockets, Threads, Maven
Frontend	Next.Js
Packaging	Docker, Docker Compose

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🚀 How to Run (Docker Compose)

Make sure you have Docker & Docker Compose installed.

# Clone this repo
git https://github.com/Varunv003/PeerConnect

# Build and start
docker-compose up --build

Stopping the Application:

To stop the application, navigate to the project directory (where the docker-compose.yml file is located) and run:

docker-compose down