[Python] Downloading just the .torrent file from a magnet uri. Not sure what I'm actually...

Given a magnet file, I'm trying to get a .torrent file using the Python bindings for libtorrent.

#!/usr/bin/env python
import libtorrent as lt
import time
import sys
import random

ses = lt.session()
r = random.randrange(10000, 49000)
ses.listen_on(r, r+50)
print("Listening on ports %s - %s." % (r, r+50))
params = {
'save_path': '.',
'storage_mode': lt.storage_mode_t(2),
'paused': False,
'auto_managed': True,
'duplicate_is_error': True,
'file_priorities': [0]*5
}

link = "magnet:?xt=urn:btih:209c8226b299b308beaf2b9cd3fb49212dbd13ec&dn=Tears+of+Steel&tr=udp%3A%2F%2Fexplodie.org%3A6969&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Ftracker.empire-js.us%3A1337&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337&tr=wss%3A%2F%2Ftracker.btorrent.xyz&tr=wss%3A%2F%2Ftracker.fastcast.nz&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2F&xs=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Ftears-of-steel.torrent"

h = lt.add_magnet_uri(ses, link, params)
ses.add_extension('ut_metadata')
ses.add_extension('ut_pex')
ses.add_extension('metadata_transfer')
ses.add_dht_router("router.utorrent.com", 6881)
ses.add_dht_router("router.bittorrent.com", 6881)
ses.add_dht_router("dht.transmissionbt.com", 6881)
ses.add_dht_router("dht.aelitis.com", 6881)
ses.start_dht()
ses.start_lsd()
ses.start_upnp()
ses.start_natpmp()

while (not h.has_metadata()):
time.sleep(1)
status = ses.status()
print("Seeking metadata for torrent (%s DHT nodes online)." % status.dht_nodes)

torinfo = h.get_torrent_info()

torfile = lt.create_torrent(h.get_torrent_info())
f = open("torrentfile.torrent", "wb")
f.write(lt.bencode(torfile.generate()))
f.close()


Several minutes later the transfer is complete and I cat the results:

[me@localhost torrent]$ cat torrentfile.torrent
d8:announce23:udp://explodie.org:696913:announce-listll23:udp://explodie.org:696934:udp://tracker.coppersurfer.tk:696931:udp://tracker.empire-js.us:133740:udp://tracker.leechers-paradise.org:696933:udp://tracker.opentrackr.org:133726:wss://tracker.btorrent.xyz25:wss://tracker.fastcast.nz32:wss://tracker.openwebtorrent.comee13:creation datei1552857262e4:info0:e[me@localhost torrent]$


The expected output is a binary .torrent file that contains all the file parts and hashes, etc. Some (possibly) relevant system info:

[me@localhost torrent]$ python --version
Python 2.7.14
[me@localhost torrent]$ python -c "import libtorrent; print libtorrent.version"
1.0.10.0
[me@localhost torrent]$ uname -a
Linux ip-172-31-53-167.ec2.internal 4.14.104-95.84.amzn2.x86_64 #1 SMP Sat Mar 2 00:40:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux


Any suggestions would be appreciated. I'm using sample code that is practically identical to snippets that are claimed to work for others. Thank you.

Continue reading...