This program attempts to make an index of the meta info available on the distributed hash table used by bittorrent (aka Mainline DHT)
Currently this program is built and tested under NixOS. It may build on other systems running the Nix package manager, which you can install with
curl https://nixos.org/nix/install | shTo build the application run nix-build shell.nix
Then modify settings.json and execute: ./result/bin/Mainline settings.json
If you are building on other systems see shell.nix for a full list of dependencies. (You need ghc and some haskell packages, two of which are not (yet) pushed upstream and need to be built from source. I recommend using Nix.)
- Implements bep_0005 and only enough bep_0003 and bep_0010 to get meta info via bep_0009.
- Can multiplex multiple nodes on a single port.
- Can use multiple ports
- Captures and writes metadata to PostgreSQL (see sql/sql.sql)
The "Architecture" directory is what evolved into a network client framework, based on the programming pattern of The Elm Architecture encouraged by Elm lang. It makes dealing with state explicit and helped simplifiy the code quite a bit. In short it takes care of opening and closing network sockets and allows for a composable program architecture that keeps the state consistent. For a complete usage example see Hello.hs
Mainline.hs implements a mainline dht node that talks to other nodes via KRPC. App.hs implements multiplexing multiple nodes on one port and intercepts various messages to initiate finding and downloading metadata.
ResolveMagnet.hs allows downloading meta info from the bittorrent network (once you have peer information)