BitTorrent-Client-XT

Minimal BitTorrent client in Node.js – tracker communication, peer list, torrent parsing and downloading files from peers

🚀 BitTorrent Client in Node.js

A fully functional BitTorrent client built from scratch using Node.js. This project demonstrates how the BitTorrent protocol works at a low level, including tracker communication (UDP & HTTP), torrent file parsing, peer discovery, and file downloading via the peer wire protocol.

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📌 Overview

This BitTorrent client is designed for educational and experimental purposes. It covers the entire flow of downloading files using .torrent metadata:

• Parses .torrent files
• Communicates with trackers to discover peers
• Connects to peers using the BitTorrent wire protocol
• Requests and downloads file pieces from peers
• Assembles and saves the complete file(s) locally

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🧠 Core Features

• ✅ Torrent file parsing (bencode decoding)
• ✅ Tracker communication (UDP and HTTP)
• ✅ Peer discovery and peer list extraction
• ✅ Peer wire protocol (handshake, bitfield, request, piece, etc.)
• ✅ Piece selection and reassembly
• ✅ File download and save to disk
• 🛠️ Error handling and reconnection logic
• 📊 Logging for all major events (trackers, peers, progress, etc.)

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🔧 Technologies Used

• Node.js (v18+ recommended)
• Core modules: net, dgram, fs, crypto, events, buffer
• Custom bencode parser
• Minimal dependencies – built from scratch to understand internals

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