bt種子文件轉換為磁力鏈接
BT種子文件相對磁力鏈來說存儲不方便,而且在網站上存放BT文件容易引起版權糾紛,而磁力鏈相對來說則風險小一些。而且很多論壇或者網站限制了文件上傳的類型,分享一個BT種子還需要改文件后綴或者壓縮一次,其他人需要下載時候還要額外多一步下載種子的操作。
所以將BT種子轉換為占用空間更小,分享更方便的磁力鏈還是有挺大好處的。
首先一個方案是使用bencode這個插件,通過pip方式安裝或者自行下載源文件https://pypi.python.org/pypi/bencode/1.0通過python setup.py install方式安裝均可。
相應的將BT種子轉換為磁力鏈代碼為:
import bencode, hashlib, base64, urllibtorrent = 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' % paramstrprint magneturi還有另外一個效率相對較高,而且更方便的方案是安裝libtorrent,在ubuntu只需要apt-get install python-libtorrent即可對應轉換磁力鏈的代碼為:
import libtorrent as btinfo = bt.torrent_info('test.torrent')print "magnet:?xt=urn:btih:%s&dn=%s" % (info.info_hash(), info.name())轉換磁力鏈接為bt種子文件
下面來看一個反過程,將磁力鏈轉化為種子文件。
1、需要先安裝python-libtorrent包 ,在ubuntu環境下,可以通過以下指令完成安裝:
# sudo apt-get install python-libtorrent
2、代碼如下:
#!/usr/bin/env pythonimport shutilimport tempfileimport os.path as ptimport sysimport libtorrent as ltfrom time import sleepdef 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 outputdef showHelp(): print("") print("USAGE: " + pt.basename(sys.argv[0]) + " MAGNET [OUTPUT]") print(" MAGNET/t- the magnet url") print(" OUTPUT/t- 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 <magnet link> [torrent file]
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