btrnmetainfo.py

[elfs]

As most people here know, I'm a big fan of anime, and most of my anime comes to me via BitTorrent. One of things that I've found commonplace is that many trackers obfuscate or otherwise mangle their torrent names. BitTorrent is tolerant of these shennanigans and even has a handler to download the files "as named on the command line" or "as named in the file."

I prefer to know what I'm dealing with before I load it into the torrent handler directly, so I wrote the following little script. It takes any torrent file and renames it to match the internal file or directory name.

 #!/bin/env python
 
 import os
 import os.path
 import sys
 
 header = 'file name.....: '
 head2  = 'directory name: '
 
 for i in sys.argv[1:]:
     try:
         f = os.popen( "btshowmetainfo.py %s" % i )
         while(1):
             l = f.readline()
             if l == '':
                 raise "No."
             if l[0:len(header)] == header:
                 fn = l[len(header):-1] + '.torrent'
                 if os.path.exists( fn ):
                     print >>sys.stderr, "Could not rename %s as %s" % ( i, fn )
                     break
                 os.rename( i, fn )
                 break
             if l[0:len(head2)] == head2:
                 fn = l[len(head2):-1] + '.torrent'
                 if os.path.exists( fn ):
                     print >>sys.stderr, "Could not rename %s as %s" % ( i, fn )
                     break
                 os.rename( i, fn )
                 break
     except:
         print >>sys.stderr, "Could not rename %s" % i
 

Comments

May I suggest?

[fallenpegasus]

#!/usr/bin/python

import os
import os.path
import sys
import BitTorrent.bencode

if len(sys.argv) == 1:
    print '%s file1.torrent file2.torrent file3.torrent ...' % argv[0]
    exit(2)

for fn in sys.argv[1:]:
    metainfo_file = open(fn, 'rb')
    metainfo = BitTorrent.bencode.bdecode(metainfo_file.read())
    metainfo_file.close()
    info = metainfo['info']
    newfn = info['name']  + '.torrent'
    if (fn == newfn):
        pass  # name already correct, do nothing
    elif os.path.exists(newfn):
        print >>sys.stderr, "Wont overwrite existing %s with %s" % (newfn, fn)
    else:
        os.rename(fn, newfn)

It probably needs exception handling added.