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parse out info_hash from magnet uris #22

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parse out info_hash from magnet uris #22

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29 changes: 24 additions & 5 deletions rtorrent/lib/torrentparser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,9 @@
import re
import rtorrent.lib.bencode as bencode
import hashlib
import urlparse
import base64
import binascii

if is_py3():
from urllib.request import urlopen # @UnresolvedImport @UnusedImport
Expand Down Expand Up @@ -89,11 +92,27 @@ def _decode_torrent(self, raw_torrent=None):

def _calc_info_hash(self):
self.info_hash = None
if "info" in self._torrent_decoded.keys():
info_encoded = bencode.encode(self._torrent_decoded["info"])

if info_encoded:
self.info_hash = hashlib.sha1(info_encoded).hexdigest().upper()
if "magnet-uri" in self._torrent_decoded.keys():
m = self._torrent_decoded['magnet-uri']
mqs=urlparse.parse_qs( urlparse.urlparse(m).query )
if 'xt' in mqs:
xts = mqs['xt'][0]
if xts.startswith( 'urn:btih:' ):
btih = xts[9:]
if len(btih) == 40:
btih = btih.upper()
elif len(btih) == 32:
btih = binascii.b2a_hex(base64.b32decode(btih)).upper()
else:
btih = None
self.info_hash = btih

if self.info_hash is None:
if "info" in self._torrent_decoded.keys():
info_encoded = bencode.encode(self._torrent_decoded["info"])

if info_encoded:
self.info_hash = hashlib.sha1(info_encoded).hexdigest().upper()

return(self.info_hash)

Expand Down