bt种子文件转换为磁力链接

BT种子文件相对磁力链来说存储不方便,而且在网站上存放BT文件容易引起版权纠纷,而磁力链相对来说则风险小一些。而且很多论坛或者网站限制了文件上传的类型,分享一个BT种子还需要改文件后缀或者压缩一次,其他人需要下载时候还要额外多一步下载种子的操作。

所以将BT种子转换为占用空间更小,分享更方便的磁力链还是有挺大好处的。

首先一个方案是使用bencode这个插件,通过pip方式安装或者自行下载源文件https://pypi.python.org/pypi/bencode/1.0通过python setup.py install方式安装均可。

相应的将BT种子转换为磁力链代码为:

import bencode, hashlib, base64, urllib

torrent = open('ubuntu-12.04.2-server-amd64.iso.torrent', 'rb').read()

metadata = bencode.bdecode(torrent)

hashcontents = bencode.bencode(metadata['info'])

digest = hashlib.sha1(hashcontents).digest()

b32hash = base64.b32encode(digest)

params = {'xt': 'urn:btih:%s' % b32hash,

'dn': metadata['info']['name'],

'tr': metadata['announce'],

'xl': metadata['info']['length']}

paramstr = urllib.urlencode(params)

magneturi = 'magnet:?%s' % paramstr

print magneturi

还有另外一个效率相对较高,而且更方便的方案是安装libtorrent,在ubuntu只需要apt-get install python-libtorrent即可对应转换磁力链的代码为:

import libtorrent as bt

info = bt.torrent_info('test.torrent')

print "magnet:?xt=urn:btih:%s&dn=%s" % (info.info_hash(), info.name())

转换磁力链接为bt种子文件

下面来看一个反过程,将磁力链转化为种子文件。

1、需要先安装python-libtorrent包 ,在ubuntu环境下,可以通过以下指令完成安装:

# sudo apt-get install python-libtorrent

2、代码如下:

#!/usr/bin/env python

import shutil

import tempfile

import os.path as pt

import sys

import libtorrent as lt

from time import sleep

def magnet2torrent(magnet, output_name=None):

if output_name and

not pt.isdir(output_name) and

not pt.isdir(pt.dirname(pt.abspath(output_name))):

print("Invalid output folder: " + pt.dirname(pt.abspath(output_name)))

print("")

sys.exit(0)

tempdir = tempfile.mkdtemp()

ses = lt.session()

params = {

'save_path': tempdir,

'duplicate_is_error': True,

'storage_mode': lt.storage_mode_t(2),

'paused': False,

'auto_managed': True,

'duplicate_is_error': True

}

handle = lt.add_magnet_uri(ses, magnet, params)

print("Downloading Metadata (this may take a while)")

while (not handle.has_metadata()):

try:

sleep(1)

except KeyboardInterrupt:

print("Aborting…")

ses.pause()

print("Cleanup dir " + tempdir)

shutil.rmtree(tempdir)

sys.exit(0)

ses.pause()

print("Done")

torinfo = handle.get_torrent_info()

torfile = lt.create_torrent(torinfo)

output = pt.abspath(torinfo.name() + ".torrent")

if output_name:

if pt.isdir(output_name):

output = pt.abspath(pt.join(

output_name, torinfo.name() + ".torrent"))

elif pt.isdir(pt.dirname(pt.abspath(output_name))):

output = pt.abspath(output_name)

print("Saving torrent file here : " + output + " …")

torcontent = lt.bencode(torfile.generate())

f = open(output, "wb")

f.write(lt.bencode(torfile.generate()))

f.close()

print("Saved! Cleaning up dir: " + tempdir)

ses.remove_torrent(handle)

shutil.rmtree(tempdir)

return output

def showHelp():

print("")

print("USAGE: " + pt.basename(sys.argv[0]) + " MAGNET [OUTPUT]")

print(" MAGNETt- the magnet url")

print(" OUTPUTt- the output torrent file name")

print("")

def main():

if len(sys.argv) < 2:

showHelp()

sys.exit(0)

magnet = sys.argv[1]

output_name = None

if len(sys.argv) >= 3:

output_name = sys.argv[2]

magnet2torrent(magnet, output_name)

if __name__ == "__main__":

main()

3、用法如下

# python Magnet_To_Torrent2.py [torrent file]