bittorrent 客户端 rain

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前言

概念与常识

How to generate a Torrent Magnet URI from a directory?
https://stackoverflow.com/questions/30294387/how-to-generate-a-torrent-magnet-uri-from-a-directory

There's no method exposed to create a magnet URI directly because such a link would be unusable!

Magnet links are hash identifiers that allow clients to retrieve a torrent file from the BitTorrent DHT network. However, they can only do so if there's at least one other client online (and with DHT enabled) that's downloading or seeding that torrent. If you generated a torrent within your application and generated a magnet link from that directly, nobody would ever have that torrent file, so it wouldn't be downloadable.

Long story short: Magnet links only really work for torrents that are created and seeded on a peer-to-peer basis. If you want to use a web seed, you'll need to offer the full torrent file for download by users.

What is “web seed”?
https://askubuntu.com/questions/313107/what-is-web-seed#:~:text=%5BWeb%20Seeds%20are%20the%5D%20location,contents%2C%20or%20existing%20web%20locations.

magnet协议

The purpose of this extension is to allow clients to join a swarm and complete a download without the need of downloading a .torrent file first. This extension instead allows clients to download the metadata from peers. It makes it possible to support magnet links, a link on a web page only containing enough information to join the swarm (the info hash).

magnet URI format
The magnet URI format is:

v1: magnet:?xt=urn:btih:<info-hash>&dn=<name>&tr=<tracker-url>&x.pe=<peer-address>
v2: magnet:?xt=urn:btmh:<tagged-info-hash>&dn=<name>&tr=<tracker-url>&x.pe=<peer-address>
<peer-address>
A peer address expressed as hostname:port, ipv4-literal:port or [ipv6-literal]:port. This parameter can be included to initiate a direct metadata transfer between two clients while reducing the need for external peer sources. It should only be included if the client can discover its public IP address and determine its reachability. Note: Since no URI scheme identifier has been allocated for bittorrent xs= is not used for this purpose.
**If no tracker is specified, the client SHOULD use the DHT (BEP 0005) to acquire peers.**

webseed 协议

Abstract
Using HTTP or FTP servers as seeds for BitTorrent downloads.

Rationale
Many websites that list a BitTorrent download also provide a HTTP or FTP URL for the same file. The files are identical. A WebSeeding BitTorrent client can download from either source, putting all the parts together into one complete file.

The HTTP or FTP server acts as a permanently unchoked seed.

使用命令

rain torrent create

rain torrent create
NAME:
   rain torrent create - create new torrent file
USAGE:
   rain torrent create [command options] [arguments...]
OPTIONS:
   --file value, -f value          include this file or directory in torrent
   --out FILE, -o FILE             save generated torrent to this FILE
   --private, -p                   create torrent for private trackers
   --piece-length value, -l value  override default piece length. by default, piece length calculated automatically based on the total size of files. given in KB. must be multiple of 16. (default: 0)
   --comment COMMENT, -c COMMENT   add COMMENT to torrent
   --tracker URL, -t URL           add tracker URL
   --webseed URL, -w URL           add webseed URL

rain torrent create

rain torrent create
NAME:
   rain torrent create - create new torrent file
USAGE:
   rain torrent create [command options] [arguments...]
OPTIONS:
   --file value, -f value          include this file or directory in torrent
   --out FILE, -o FILE             save generated torrent to this FILE
   --private, -p                   create torrent for private trackers
   --piece-length value, -l value  override default piece length. by default, piece length calculated automatically based on the total size of files. given in KB. must be multiple of 16. (default: 0)
   --comment COMMENT, -c COMMENT   add COMMENT to torrent
   --tracker URL, -t URL           add tracker URL
   --webseed URL, -w URL           add webseed URL

rain client

NAME:
   rain client - send rpc request to server
USAGE:
   rain client command [command options] [arguments...]
COMMANDS:
   Actions:
     add             add torrent or magnet
     remove          remove torrent
     clean-database  clean session database
     add-peer        add peer to torrent
     add-tracker     add tracker to torrent
     announce        announce to tracker
     verify          verify files
     start           start torrent
     stop            stop torrent
     start-all       start all torrents
     stop-all        stop all torrents
     move            move torrent to another server
   Getters:
     version        server version
     list           list torrents
     stats          get stats of torrent
     session-stats  get stats of session
     trackers       get trackers of torrent
     webseeds       get webseed sources of torrent
     peers          get peers of torrent
     torrent        save torrent file
     magnet         get magnet link
   Other:
     console  show client console
OPTIONS:
   --url value      URL of RPC server (default: "http://127.0.0.1:7246")
   --timeout value  request timeout (default: 10s)
   --help, -h       show help

创建种子

rain torrent create  -t http://bttracker.top:6969/announce -f tests -o tests.torrent

注意：

ll /data/dcp/tstdir5/gnome-software-0J8ZXZ/debconf.socket
srwxrwxrwx 1 tms tms 0 2月  25  2019 /data/dcp/tstdir5/gnome-software-0J8ZXZ/debconf.socket=

s文件会停止并提示：

rain torrent create  -t http://bttracker.top:6969/announce -f /data/dcp/tstdir5  -o tstdir5.torrent
2020-08-23 18:54:21 CRITICAL [rain] main.go:482 open /data/dcp/tstdir5/gnome-software-0J8ZXZ/debconf.socket: no such device or address

查看种子

rain torrent show -f tests.torrent 

添加种子到rpc server

rain client add -t testonly_dirsend.torrent  

注意确保 原文件路径 在位置上。