FedP2P/README.md

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# torrent
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[![Build Status](https://drone.io/github.com/anacrolix/torrent/status.png)](https://drone.io/github.com/anacrolix/torrent/latest)
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[![GoDoc](https://godoc.org/github.com/anacrolix/torrent?status.svg)](https://godoc.org/github.com/anacrolix/torrent)
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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 a downstream, private service since late 2014.
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There is support for protocol encryption, DHT, PEX, uTP, and various extensions. See the package documentation for a more complete list. There are several data storage backends provided: blob, file, and mmap, and you can write your own, such as to store data on S3, or in a database. You can use the provided binaries in `./cmd`, or use `torrent` as a library for your own applications.
Many of the sub-packages can be used for other purposes: dht, bencode, and tracker, in particular.
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## Installation
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Install the library package with `go get github.com/anacrolix/torrent`, or the provided cmds with `go get github.com/anacrolix/torrent/cmd/...`.
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## Library example
There is a small example in the [package documentation](https://godoc.org/github.com/anacrolix/torrent).
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## Commands
Here I'll describe what some of the provided commands in `./cmd` do.
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Note that the [`godo`](https://github.com/anacrolix/godo) command which is invoked in the following examples builds and executes a Go import path, like `go run`. It's easier to use this convention than to spell out the install/invoke cycle for every single example.
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### torrent
Downloads torrents from the command-line.
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$ go get github.com/anacrolix/torrent/cmd/torrent
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$ torrent 'magnet:?xt=urn:btih:KRWPCX3SJUM4IMM4YF5RPHL6ANPYTQPU'
2015/04/01 02:08:20 main.go:137: downloaded ALL the torrents
$ md5sum ubuntu-14.04.2-desktop-amd64.iso
1b305d585b1918f297164add46784116 ubuntu-14.04.2-desktop-amd64.iso
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$ echo such amaze
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wow
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### torrentfs
torrentfs mounts a FUSE filesystem at `-mountDir`. The contents are the torrents described by the torrent files and magnet links at `-torrentPath`. Data for read requests is fetched only as required from the torrent network, and stored at `-downloadDir`.
$ mkdir mnt torrents
$ godo github.com/anacrolix/torrent/cmd/torrentfs -mountDir mnt -torrentPath torrents &
$ cd torrents
$ wget http://releases.ubuntu.com/14.04.2/ubuntu-14.04.2-desktop-amd64.iso.torrent
$ cd ..
$ ls mnt
ubuntu-14.04.2-desktop-amd64.iso
$ pv mnt/ubuntu-14.04.2-desktop-amd64.iso | md5sum
996MB 0:04:40 [3.55MB/s] [========================================>] 100%
1b305d585b1918f297164add46784116 -
### torrent-magnet
Creates a magnet link from a torrent file. Note the extracted trackers, display name, and info hash.
$ godo github.com/anacrolix/torrent/cmd/torrent-magnet < ubuntu-14.04.2-desktop-amd64.iso.torrent
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
### dht-ping
Pings DHT nodes with the given network addresses.
$ godo ./cmd/dht-ping router.bittorrent.com:6881 router.utorrent.com:6881
2015/04/01 17:21:23 main.go:33: dht server on [::]:60058
32f54e697351ff4aec29cdbaabf2fbe3467cc267 (router.bittorrent.com:6881): 648.218621ms
ebff36697351ff4aec29cdbaabf2fbe3467cc267 (router.utorrent.com:6881): 873.864706ms
2/2 responses (100.000000%)