265 lines
8.9 KiB
Python
265 lines
8.9 KiB
Python
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# Written by Bram Cohen
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# multitracker extensions by John Hoffman
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# see LICENSE.txt for license information
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from os.path import getsize, split, join, abspath, isdir
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from os import listdir
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from hashlib import sha1 as sha
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from copy import copy
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from string import strip
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from bencode import bencode
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from btformats import check_info
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from threading import Event
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from time import time
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from traceback import print_exc
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try:
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from sys import getfilesystemencoding
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ENCODING = getfilesystemencoding()
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except:
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from sys import getdefaultencoding
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ENCODING = getdefaultencoding()
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defaults = [
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('announce_list', '',
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'a list of announce URLs - explained below'),
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('httpseeds', '',
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'a list of http seed URLs - explained below'),
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('piece_size_pow2', 0,
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"which power of 2 to set the piece size to (0 = automatic)"),
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('comment', '',
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"optional human-readable comment to put in .torrent"),
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('filesystem_encoding', '',
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"optional specification for filesystem encoding " +
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"(set automatically in recent Python versions)"),
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('target', '',
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"optional target file for the torrent")
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]
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default_piece_len_exp = 18
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ignore = ['core', 'CVS']
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def print_announcelist_details():
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print (' announce_list = optional list of redundant/backup tracker URLs, in the format:')
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print (' url[,url...][|url[,url...]...]')
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print (' where URLs separated by commas are all tried first')
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print (' before the next group of URLs separated by the pipe is checked.')
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print (" If none is given, it is assumed you don't want one in the metafile.")
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print (' If announce_list is given, clients which support it')
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print (' will ignore the <announce> value.')
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print (' Examples:')
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print (' http://tracker1.com|http://tracker2.com|http://tracker3.com')
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print (' (tries trackers 1-3 in order)')
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print (' http://tracker1.com,http://tracker2.com,http://tracker3.com')
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print (' (tries trackers 1-3 in a randomly selected order)')
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print (' http://tracker1.com|http://backup1.com,http://backup2.com')
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print (' (tries tracker 1 first, then tries between the 2 backups randomly)')
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print ('')
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print (' httpseeds = optional list of http-seed URLs, in the format:')
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print (' url[|url...]')
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def make_meta_file(file, url, params = {}, flag = Event(),
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progress = lambda x: None, progress_percent = 1):
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if params.has_key('piece_size_pow2'):
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piece_len_exp = params['piece_size_pow2']
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else:
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piece_len_exp = default_piece_len_exp
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if params.has_key('target') and params['target'] != '':
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f = params['target']
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else:
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a, b = split(file)
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if b == '':
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f = a + '.torrent'
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else:
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f = join(a, b + '.torrent')
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if piece_len_exp == 0: # automatic
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size = calcsize(file)
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if size > 8L*1024*1024*1024: # > 8 gig =
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piece_len_exp = 21 # 2 meg pieces
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elif size > 2*1024*1024*1024: # > 2 gig =
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piece_len_exp = 20 # 1 meg pieces
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elif size > 512*1024*1024: # > 512M =
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piece_len_exp = 19 # 512K pieces
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elif size > 64*1024*1024: # > 64M =
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piece_len_exp = 18 # 256K pieces
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elif size > 16*1024*1024: # > 16M =
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piece_len_exp = 17 # 128K pieces
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elif size > 4*1024*1024: # > 4M =
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piece_len_exp = 16 # 64K pieces
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else: # < 4M =
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piece_len_exp = 15 # 32K pieces
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piece_length = 2 ** piece_len_exp
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encoding = None
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if params.has_key('filesystem_encoding'):
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encoding = params['filesystem_encoding']
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if not encoding:
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encoding = ENCODING
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if not encoding:
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encoding = 'ascii'
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info = makeinfo(file, piece_length, encoding, flag, progress, progress_percent)
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if flag.isSet():
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return
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check_info(info)
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h = open(f, 'wb')
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data = {'info': info, 'announce': strip(url), 'creation date': long(time())}
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if params.has_key('comment') and params['comment']:
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data['comment'] = params['comment']
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if params.has_key('real_announce_list'): # shortcut for progs calling in from outside
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data['announce-list'] = params['real_announce_list']
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elif params.has_key('announce_list') and params['announce_list']:
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l = []
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for tier in params['announce_list'].split('|'):
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l.append(tier.split(','))
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data['announce-list'] = l
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if params.has_key('real_httpseeds'): # shortcut for progs calling in from outside
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data['httpseeds'] = params['real_httpseeds']
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elif params.has_key('httpseeds') and params['httpseeds']:
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data['httpseeds'] = params['httpseeds'].split('|')
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h.write(bencode(data))
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h.close()
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def calcsize(file):
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if not isdir(file):
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return getsize(file)
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total = 0L
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for s in subfiles(abspath(file)):
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total += getsize(s[1])
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return total
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def uniconvertl(l, e):
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r = []
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try:
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for s in l:
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r.append(uniconvert(s, e))
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except UnicodeError:
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raise UnicodeError('bad filename: '+join(*l))
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return r
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def uniconvert(s, e):
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try:
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if s.__class__.__name__ != 'unicode':
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s = unicode(s,e)
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except UnicodeError:
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raise UnicodeError('bad filename: '+s)
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return s.encode('utf-8')
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def makeinfo(file, piece_length, encoding, flag, progress, progress_percent=1):
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file = abspath(file)
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if isdir(file):
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subs = subfiles(file)
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subs.sort()
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pieces = []
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sh = sha()
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done = 0L
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fs = []
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totalsize = 0.0
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totalhashed = 0L
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for p, f in subs:
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totalsize += getsize(f)
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for p, f in subs:
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pos = 0L
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size = getsize(f)
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fs.append({'length': size, 'path': uniconvertl(p, encoding)})
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h = open(f, 'rb')
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while pos < size:
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a = min(size - pos, piece_length - done)
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sh.update(h.read(a))
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if flag.isSet():
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return
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done += a
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pos += a
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totalhashed += a
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if done == piece_length:
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pieces.append(sh.digest())
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done = 0
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sh = sha()
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if progress_percent:
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progress(totalhashed / totalsize)
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else:
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progress(a)
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h.close()
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if done > 0:
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pieces.append(sh.digest())
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return {'pieces': ''.join(pieces),
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'piece length': piece_length, 'files': fs,
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'name': uniconvert(split(file)[1], encoding) }
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else:
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size = getsize(file)
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pieces = []
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p = 0L
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h = open(file, 'rb')
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while p < size:
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x = h.read(min(piece_length, size - p))
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if flag.isSet():
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return
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pieces.append(sha(x).digest())
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p += piece_length
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if p > size:
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p = size
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if progress_percent:
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progress(float(p) / size)
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else:
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progress(min(piece_length, size - p))
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h.close()
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return {'pieces': ''.join(pieces),
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'piece length': piece_length, 'length': size,
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'name': uniconvert(split(file)[1], encoding) }
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def subfiles(d):
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r = []
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stack = [([], d)]
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while len(stack) > 0:
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p, n = stack.pop()
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if isdir(n):
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for s in listdir(n):
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if s not in ignore and s[:1] != '.':
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stack.append((copy(p) + [s], join(n, s)))
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else:
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r.append((p, n))
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return r
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def completedir(dir, url, params = {}, flag = Event(),
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vc = lambda x: None, fc = lambda x: None):
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files = listdir(dir)
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files.sort()
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ext = '.torrent'
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if params.has_key('target'):
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target = params['target']
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else:
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target = ''
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togen = []
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for f in files:
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if f[-len(ext):] != ext and (f + ext) not in files:
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togen.append(join(dir, f))
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total = 0
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for i in togen:
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total += calcsize(i)
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subtotal = [0]
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def callback(x, subtotal = subtotal, total = total, vc = vc):
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subtotal[0] += x
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vc(float(subtotal[0]) / total)
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for i in togen:
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fc(i)
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try:
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t = split(i)[-1]
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if t not in ignore and t[0] != '.':
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if target != '':
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params['target'] = join(target,t+ext)
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make_meta_file(i, url, params, flag, progress = callback, progress_percent = 0)
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except ValueError:
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print_exc()
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