README.md

   1 # torrent
   2
   3 [![PkgGoDev](https://pkg.go.dev/badge/github.com/anacrolix/torrent)](https://pkg.go.dev/github.com/anacrolix/torrent)
   4
   5 This repository implements BitTorrent-related packages and command-line utilities in Go. The emphasis is on use as a library from other projects. It's been used 24/7 in production by downstream services since late 2014. The implementation was specifically created to explore Go's concurrency capabilities, and to include the ability to stream data directly from the BitTorrent network. To this end it [supports seeking, readaheads and other features](https://godoc.org/github.com/anacrolix/torrent#Reader) exposing torrents and their files with the various Go idiomatic `io` package interfaces. This is also demonstrated through [torrentfs](#torrentfs).
   6
   7 There is [support for protocol encryption, DHT, PEX, uTP, and various extensions](https://godoc.org/github.com/anacrolix/torrent). There are [several data storage backends provided](https://godoc.org/github.com/anacrolix/torrent/storage): blob, file, bolt, mmap, and sqlite, to name a few. You can [write your own](https://godoc.org/github.com/anacrolix/torrent/storage#ClientImpl) to store data for example on S3, or in a database.
   8
   9 Some noteworthy package dependencies that can be used for other purposes include:
  10
  11  * [go-libutp](https://github.com/anacrolix/go-libutp)
  12  * [dht](https://github.com/anacrolix/dht)
  13  * [bencode](https://godoc.org/github.com/anacrolix/torrent/bencode)
  14  * [tracker](https://godoc.org/github.com/anacrolix/torrent/tracker)
  15
  16 ## Installation
  17
  18 Install the library package with `go get github.com/anacrolix/torrent`, or the provided cmds with `go install github.com/anacrolix/torrent/cmd/...@latest`.
  19
  20 ## Library examples
  21
  22 There are some small [examples](https://godoc.org/github.com/anacrolix/torrent#pkg-examples) in the package documentation.
  23
  24 ## Mentions
  25
  26  * [@anacrolix](https://github.com/anacrolix) is interviewed about this repo in [Console 32](https://console.substack.com/p/console-32).
  27
  28 ### Downstream projects
  29
  30 There are several web-frontends and Android clients among the known public projects:
  31
  32  * [Torrent.Express](https://torrent.express/)
  33  * [Confluence](https://github.com/anacrolix/confluence)
  34  * [Trickl](https://github.com/arranlomas/Trickl)
  35  * [Elementum](http://elementum.surge.sh/) (up to version 0.0.71)
  36  * [goTorrent](https://github.com/deranjer/goTorrent)
  37  * [Go Peerflix](https://github.com/Sioro-Neoku/go-peerflix)
  38  * [Simple Torrent](https://github.com/boypt/simple-torrent) (fork of [Cloud Torrent](https://github.com/jpillora/cloud-torrent), unmaintained)
  39  * [Android Torrent Client](https://gitlab.com/axet/android-torrent-client)
  40  * [libtorrent](https://gitlab.com/axet/libtorrent)
  41  * [Remote-Torrent](https://github.com/BruceWangNo1/remote-torrent)
  42  * [ANT-Downloader](https://github.com/anatasluo/ant)
  43  * [Go-PeersToHTTP](https://github.com/WinPooh32/peerstohttp)
  44  * [CortexFoundation/torrentfs](https://github.com/CortexFoundation/torrentfs): P2P file system of cortex full node
  45  * [TorrServ](https://github.com/YouROK/TorrServer): Torrent streaming server over http.
  46  * [Webtor](https://webtor.io/): free cloud BitTorrent-client
  47
  48 ## Help
  49
  50 Communication about the project is primarily through [Discussions](https://github.com/anacrolix/torrent/discussions) and the [issue tracker](https://github.com/anacrolix/torrent/issues).
  51
  52 ## Command packages
  53
  54 Here I'll describe what some of the packages in `./cmd` do. See [installation](#installation) to make them available.
  55
  56 ### torrent
  57
  58 Downloads torrents from the command-line.
  59
  60     $ torrent download 'magnet:?xt=urn:btih:KRWPCX3SJUM4IMM4YF5RPHL6ANPYTQPU'
  61     ... lots of jibba jabber ...
  62     downloading "ubuntu-14.04.2-desktop-amd64.iso": 1.0 GB/1.0 GB, 1989/1992 pieces completed (1 partial)
  63     2015/04/01 02:08:20 main.go:137: downloaded ALL the torrents
  64     $ md5sum ubuntu-14.04.2-desktop-amd64.iso
  65     1b305d585b1918f297164add46784116  ubuntu-14.04.2-desktop-amd64.iso
  66     $ echo such amaze
  67     wow
  68
  69 ### torrentfs
  70
  71 torrentfs mounts a FUSE filesystem at `-mountDir`. The contents are the torrents described by the torrent files and magnet links at `-metainfoDir`. Data for read requests is fetched only as required from the torrent network, and stored at `-downloadDir`.
  72
  73     $ mkdir mnt torrents
  74     $ torrentfs -mountDir=mnt -metainfoDir=torrents &
  75     $ cd torrents
  76     $ wget http://releases.ubuntu.com/14.04.2/ubuntu-14.04.2-desktop-amd64.iso.torrent
  77     $ cd ..
  78     $ ls mnt
  79     ubuntu-14.04.2-desktop-amd64.iso
  80     $ pv mnt/ubuntu-14.04.2-desktop-amd64.iso | md5sum
  81     996MB 0:04:40 [3.55MB/s] [========================================>] 100%
  82     1b305d585b1918f297164add46784116  -
  83
  84 ### torrent-magnet
  85
  86 Creates a magnet link from a torrent file. Note the extracted trackers, display name, and info hash.
  87
  88     $ torrent-magnet < torrents/ubuntu-14.04.2-desktop-amd64.iso.torrent
  89     magnet:?xt=urn:btih:546cf15f724d19c4319cc17b179d7e035f89c1f4&dn=ubuntu-14.04.2-desktop-amd64.iso&tr=http%3A%2F%2Ftorrent.ubuntu.com%3A6969%2Fannounce&tr=http%3A%2F%2Fipv6.torrent.ubuntu.com%3A6969%2Fannounce