This is a very simple BitTorrent client that I implemented for fun and to learn more about P2P protocols like BitTorrent. On the way, I learned the following:

1. Python's asyncio library for asyncronous programming
2. How to structure a big project

Limitations -

1. Only supports downloading a torrent with single file
2. Doesn't support seeding

$ pip install -r requirements.txt

$ python cli.py --file C:\Users\chaitanya\Documents\torrents\linuxmint-18-cinnamon-64bit.iso.torrent

The main controller is the TorrentClient. It is responsible for the following:

• Connecting to Tracker and getting the peer information. Created a Queue with peers that workers will consume from.
• Starting workers to consume data from the peers
• Using PieceManager to manage the torrent pieces
  • PieceManager is also responsible for devising a stratedy as to which piece to be requested next for a peer

Protocol implementes the BitTorrent protocol. The unofficial specification can be found here: https://wiki.theory.org/BitTorrentSpecification

Read more about each module in /docs

1. Support torrents with multiple files
2. Support seeding aka uploading data to other peers
3. Improve performance

• http://www.kristenwidman.com/blog/33/how-to-write-a-bittorrent-client-part-1/

The client is released under the MIT license, see LICENSE.