-# A bittorrent client.
+# A command line BitTorrent client.
-[](https://gitter.im/vu3rdd/functorrent?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+I started writing a BitTorrent client because it seemed like fun
+and I am learning Haskell and wanted to see if I can write something
+real with Haskell than just heat the room. It is turning out to be a
+lot of fun.
-[](https://travis-ci.org/vu3rdd/functorrent)
-
-## Building
-
-Functorrent can be build with [Cabal](https://www.haskell.org/cabal/) sandbox or
-[Nix](https://nixos.org/nix/).
-
-### Cabal sandbox
-
-Sandboxes give you per project independent containers, just like Python's
-virtualenv.
+### Building
+You need to install [Stack](https://github.com/commercialhaskell/stack), either via
+the OS package manager or via `cabal` (`cabal install stack`).
$ git clone https://github.com/vu3rdd/functorrent && cd functorrent
- $ cabal sandbox init
- $ cabal install --only-dependencies --enable-tests
- $ cabal build # binaries in ./dist/built/functorrent/*
+ $ cabal install stack # or install stack by other means
+ $ stack build # binaries in $(pwd)/.stack-work/install/x86..../lts-2.16/7.8.4/bin/functorrent
+
+### Usage
-### Building with Nix
+If you invoke functorrent without any options, it expects the contents of a torrent file
+to be given in stdin. So
-``$ nix-shell``` at the root of the source code repo should drop you into a
-shell which has all the package dependencies installed.
+ $ cat ubuntu-14.10-desktop-amd64.iso.torrent | functorrent
+ [....]
+Or one can explicitly specify the torrent file as input.
- $ nix-shell --pure
+ $ functorrent ubuntu-14.10-desktop-amd64.iso.torrent
[...]
- [nix-shell] $ cabal configure && cabal build
-## Goals
+### Goals
- [Optimized for Fun](http://www.slideshare.net/autang/ofun-optimizing-for-fun).
(should have called it "funtorrent")
- Implement something non-trivial with Haskell (crypto, file operations, network
operations, concurrency, bit twiddling, DHT).
- Follow the spec ([official spec](http://bittorrent.org/beps/bep_0003.html), [unofficial spec](https://wiki.theory.org/BitTorrentSpecification))
-- Easy for newbies like me to read and understand along side the spec.
+- Easy for newbies like me to read and understand alongside the spec.
- doctest and quickcheck tests.
- Follow Haskell Style Guide - https://github.com/tibbe/haskell-style-guide/blob/master/haskell-style.md
-## Current Status
+### WARNING
+
+This client is not usable as your daily BitTorrent client yet. You may get
+corrupted files and end up wasting a lot of bandwidth. So, until we achieve
+some robustness, consider this as a programmer-friendly project to learn
+about a bunch of stuff.
+
+### Current Status
+
+- most of the peer wire protocol works.
+- talks only to one peer at the moment.
+- can download files. But needs every piece to be served by the peer it connected to.
+- can talk to http/udp trackers.
+
+### TODO
-- can decode torrent files (bencoding)
-- talk to the tracker and get the peer list
-- the `main' program takes a torrent file (in the local file system) as input and
- prints the {ip,port} for each peer, after talking to the tracker.
-- can handshake with the peer.
-- peer wire protocol (in progress)
+- Test suite.
+- Talk to multiple peers concurrently.
+- Piece download algorithms.
+- Multifile torrent support.
+- Magnet link support.
+- other advanced features of BitTorrent (like DHT).
-## TODO
+### Misc
-* Test suite.
-* Peer protocol (in progress).
-* Get the file download working in the simplest possible way.
-* Concurrency (threads per peer)
-* other advanced features of Bit Torrent (like DHT).
+The Bangalore Haskell group forked an early version of this code and started to develop it as a group. My code has diverged a lot from it. Both are calling it functorrent. Perhaps that needs to be fixed.
projects / functorrent.git / blobdiff