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Simple Torrent-like Application (STA)

Overview

This project is a Simple Torrent-like Application (STA) developed for the Computer Networks course in Semester 1, 2024-2025. The application mimics a torrent-based file-sharing system and supports multi-direction data transferring (MDDT).

Features

  • Tracker and Node Architecture:
    • Centralized tracker that monitors file pieces and nodes.
    • Nodes can request files and inform the tracker about their local repository.
  • Multi-direction Data Transferring (MDDT):
    • Download multiple files from multiple source nodes simultaneously.
  • Peer-to-Peer File Sharing:
    • Supports downloading from multiple peers.
    • Implements uploading (seeding) to other peers.
  • Custom Protocols:
    • Magnet text and metainfo files for torrent management.
    • Tracker HTTP communication for peer discovery.

Objectives

  • Build a functional torrent-like application with a multithreaded implementation.
  • Ensure the application supports concurrent downloads/uploads.
  • Provide a user interface for monitoring upload/download statistics.

Components

  1. Magnet Text:
    • Contains metadata and a hash code pointing to the metainfo file on the tracker.
  2. Metainfo File (.torrent):
    • Includes tracker information, piece length, and piece count.
  3. Pieces:
    • Uniformly sized parts of a file for downloading (default: 512 KB).
  4. Tracker:
    • Handles peer registration and provides peer lists.

Tracker HTTP Protocol

  • Request Parameters:
    • Magnet text for identifying the metainfo file.
    • Download progress updates (started, stopped, completed).
  • Response Format:
    • Peer list with details (IP, port, and ID).

Peer-to-Peer Communication

  • Downloading:
    • Connect to multiple peers to download file pieces.
    • Maintain a request queue to track progress.
  • Uploading:
    • Serve file pieces to other peers.
    • Implement seeding strategies.

User Interface

  • Command-line based client supporting fundamental torrent operations.
  • Statistics display for uploads and downloads.
  • Optional GUI for enhanced visualization.

Advanced Features

  • Distributed Hash Table (DHT) for tracker-less operation.
  • Simultaneous torrent management.
  • Download/seeding optimization strategies (e.g., rarest-first).
  • Tracker scraping for metadata exchange.

Development Phases

  1. Phase 1 (First 2 weeks):
    • Define application functions and protocols.
    • Submit a softcopy report detailing these definitions.
  2. Phase 2 (Next 2 weeks):
    • Implement and refine the application.
    • Submit a final report including design, source code, and results.

Evaluation Criteria

  • Tracker Protocol: 15%
  • Torrent Download: 30%
  • Torrent Upload: 15%
  • Multiple Host Deployment: 20%
  • MDDT Feature: 10%
  • Advanced Features: 10%

Submission Requirements

  • Phase 1 Report: PDF file containing application functions and protocols.
  • Final Report: Comprehensive report including all development phases, source code, and application executable.

Getting Started

  1. Clone the repository: 
    git clone https://github.com/huyhoang8704/CO3093-ComputerNetwork.git
  2. Install dependencies: 
    pip install -r requirements.txt
  3. Run the tracker: 
    python tracker.py
  4. Run the node: 
    python node.py

Authors

Team members

No. Full name Student ID
1 Nguyễn Huy Hoàng 2211091
2 Nguyễn Lê Gia Kiệt 2211761
3 Nguyễn Chí Thiết 2213242