Looking for some good books or technical resources for a detailed understanding of how Bittorrent works? It would probably involve books on Network programming, P2P programming, and other topics.
The first place to look would probably be BitTorrent.org. It lists the standard specification as well as a lot of the extensions that have become de facto standards (most of which have been developed by µTorrent or Azereus).
A thorough guide can also be found here, though it might not be as up-to-date as the first link.
Keep in mind that most of the complexity with bittorrent relates to the client implementations, whereas the server ("tracker") is fairly trivial.
来源：https://stackoverflow.com/questions/383862/looking-for-some-good-books-resources-on-understanding-bittorrent