Implementing Bittorrent Protocol

Question

I am looking for a tutorial/blog post on how to implement bittorrent protocol step by step. How it works? How do you make requests to peers? and talk to trackers.

I do not mind the programming language (java,ruby,perl,c#)

Answer 1

the complete description of bittorrent protocol:

http://jonas.nitro.dk/bittorrent/bittorrent-rfc.html

Answer 2

There is the libtorrent library.

Here's the API documentation and examples.

Answer 3

This is good source http://www.kristenwidman.com/blog/how-to-write-a-bittorrent-client-part-1/ She explains the process step by step...

Answer 4

I'd suggest you look at the spec and sources of some OSS clients. You'll have to do some work, but that's how programming works.

Answer 5

I'm currently implementing a BitTorrent client in Java using this specification.

Answer 6

Qt is very easy to read so you can read the Qt Torrent Example (C++)

Answer 7

This is a implementation of the bittorrent protocol done in .NET. Its source code is available on github and it has documentation

Monotorrent

Answer 8

Implementing the protocol is not that hard by following the specs. However, there are lots of internal things like storage, scalable server, peer/piece pick algorithm, etc.

Earlier BitTorrent implementation or BitTornado used python, which is easy to read. I personally found them useful to understand the internals.