List .torrent files that have pathlengths over a given threshold (defaults to 180 characters).

checkpathlength.py

import bencode
import os


def toolong(torrent, max_, host=None):
    decoded = bencode.bdecode(torrent)
    if host is not None:
        for url in decoded.get('announce-list', [decoded['announce']]):
            if host in url: break
        else: return False
    name = decoded['info']['name'] + '/'
    if 'files' not in decoded['info']:
        return len(name[:-1]) > max_
    for file in decoded['info']['files']:
        if len(name + '/'.join(file['path'])) > max_:
            return True


def main():
    from optparse import OptionParser
    usage = "usage: %prog [options] directory"
    parser = OptionParser(usage=usage)
    parser.add_option('-t', '--tracker', dest='host',
        help='Only test torrents with this tracker hostname', default=None)
    parser.add_option('-m', '--max', dest='max_', help='Maximum file length',
        type='int', default=180, metavar='MAX')
    options, args = parser.parse_args()

    for (dirpath, dirnames, filenames) in os.walk(args[0]):
        for filename in filenames:
            if not filename.endswith('.torrent'): continue
            torrent = open(os.path.join(dirpath, filename), 'rb').read()
            if toolong(torrent, options.max_, options.host):
                print filename


if __name__ == '__main__':
    main()