Build Your Own BitTorrent Client

Build a complete BitTorrent client from scratch. You'll implement bencoding for the wire format, parse .torrent metainfo and magnet URIs, talk to HTTP and UDP trackers, perform the peer handshake, frame typed peer messages, verify pieces with SHA-1, and implement rarest-first piece selection. By the end you'll deeply understand what qBittorrent, Transmission, and libtorrent actually do.