From: Oleg Broytman Date: Thu, 11 Nov 2010 01:12:44 +0000 (+0000) Subject: Torrent Virtual FileSystem for Midnight Commander. X-Git-Url: https://git.phdru.name/?p=extfs.d.git;a=commitdiff_plain;h=b94b085d131d41d2dc15a98089208cfb4be7d6b2 Torrent Virtual FileSystem for Midnight Commander. git-svn-id: file:///home/phd/archive/SVN/mc-extfs/trunk@41 1a6e6372-1aea-0310-bd00-dc960550e1df --- diff --git a/torrent b/torrent new file mode 100755 index 0000000..a845856 --- /dev/null +++ b/torrent @@ -0,0 +1,226 @@ +#! /usr/bin/env python + +"""Torrent Virtual FileSystem for Midnight Commander + +The script requires Midnight Commander 3.1+ +(http://www.midnight-commander.org/), Python 2.4+ (http://www.python.org/), +module eff_bdecode.py (http://effbot.org/zone/bencode.htm). + +Put the script in the /usr/[local/][lib|share]/mc/extfs/, and add a line +"torrent" to the /usr/[local/][lib|share]/mc/extfs/extfs.ini. Make the script +executable. + +Run this "cd" command in the Midnight Commander (in the "bindings" file the +command is "%cd"): cd file#torrent, where "file" is the name of your torrent +metafile. The VFS lists all files and directories from the torrent metafile; +all files appear empty, of course, but the sizes are shown. + +Along with the files/directories in the torrent metafile the VFS also presents +meta information - in the form of files in .META directory. The size and +contents of these files are taken from the corresponding fields in the torrent +metafile. The VFS doesn't check if the torrent contains .META file or directory +(quite unlikely). + +Date/time for all files is set at midnight of the 1st January of the current +year. + +""" + +__version__ = "1.0.0" +__revision__ = "$Id$" +__date__ = "$Date$" +__author__ = "Oleg Broytman " +__copyright__ = "Copyright (C) 2010 PhiloSoft Design" +__license__ = "GPL" + +import locale, sys, os +from tempfile import _candidate_tempdir_list +from eff_bdecode import decode + +import logging +logger = logging.getLogger('torrent-mcextfs') +log_err_handler = logging.StreamHandler(sys.stderr) +logger.addHandler(log_err_handler) +logger.setLevel(logging.INFO) + +if len(sys.argv) < 3: + logger.critical("""\ +Torrent Virtual FileSystem for Midnight Commander version %s +Author: %s +%s + +This is not a program. Put the script in /usr/[local/][lib|share]/mc/extfs. +For more information read the source!""", + __version__, __author__, __copyright__ +) + sys.exit(1) + + +tempdirlist = _candidate_tempdir_list() +tempdirlist.insert(0, os.path.abspath(os.path.dirname(sys.argv[2]))) + +found = False +for tempdir in tempdirlist: + try: + logfile_name = os.path.join(tempdir, 'torrent-mcextfs.log') + logfile = open(logfile_name, 'w') + except IOError: + pass + else: + found = True + logfile.close() + break + +if not found: + logger.critical("Cannot initialize error log file in directories %s" % str(tempdirlist)) + sys.exit(1) + +logger.removeHandler(log_err_handler) +logger.addHandler(logging.FileHandler(logfile_name)) + +locale.setlocale(locale.LC_ALL, '') +charset = locale.getpreferredencoding() + + +def mctorrent_list(): + """List the entire VFS""" + + if 'info' not in torrent: + torrent_error('Info absent') + + info = torrent['info'] + if 'name' not in info: + torrent_error('Unknown name') + + name = info['name'] + if 'files' in info: + files = info['files'] + paths = [] + for file in files: + if 'path' not in file: + torrent_error('Unknown path') + if 'length' not in file: + torrent_error('Unknown length') + path = file['path'] + length = file['length'] + paths.append(('/'.join([name] + path), length)) + else: # One-file torrent + if 'length' not in info: + torrent_error('Unknown length') + length = info['length'] + paths = [(name, length)] + + meta = [] + for name in 'comment', 'encoding', 'creation date', 'announce-list', \ + 'created by', 'announce': + if name in torrent: + if name == 'creation date': + data = decode_datetime(torrent[name]) + elif name == 'announce-list': + data = decode_list(torrent[name]) + else: + data = torrent[name] + meta.append(('.META/' + name, len(data))) + + if 'private' in info: + meta.append(('.META/private', 1)) + + for name, size in paths + meta: + print "-r--r--r-- 1 user group %d Jan 1 00:00 %s" % (size, name) + + +def mctorrent_copyout(): + """Extract a file from the VFS""" + + torrent_filename = sys.argv[3] + real_filename = sys.argv[4] + data = None + + for name in 'comment', 'encoding', 'creation date', 'announce-list', \ + 'created by', 'announce': + if torrent_filename == '.META/' + name: + if name in torrent: + if name == 'creation date': + data = decode_datetime(torrent[name]) + elif name == 'announce-list': + data = decode_list(torrent[name]) + else: + data = str(torrent[name]) + else: + torrent_error('Unknown ' + name) + break + + if torrent_filename == '.META/private': + if 'info' not in torrent: + torrent_error('Info absent') + info = torrent['info'] + if 'private' not in info: + torrent_error('Info absent') + data = str(info['private']) + + if not torrent_filename.startswith('.META/'): + data = '' + + if data is None: + torrent_error('Unknown file name') + else: + outfile = open(real_filename, 'w') + outfile.write(data) + outfile.close() + + +def mctorrent_copyin(): + """Put a file to the VFS""" + sys.exit("Torrent VFS doesn't support adding files") + +def mctorrent_rm(): + """Remove a file from the VFS""" + sys.exit("Torrent VFS doesn't support removing files/directories") + +mctorrent_rmdir = mctorrent_rm + +def mctorrent_mkdir(): + """Create a directory in the VFS""" + sys.exit("Torrent VFS doesn't support creating directories") + + +def torrent_error(error_str): + logger.critical("Error parsing the torrent metafile: %s", error_str) + sys.exit(1) + +def decode_torrent(): + try: + torrent_file = open(sys.argv[2], 'r') + data = torrent_file.read() + torrent_file.close() + return decode(data) + except IOError, error_str: + torrent_error(error_str) + + +def decode_datetime(dt): + from time import localtime, asctime + the_time = float(dt) + l_now = localtime(the_time) + return asctime(l_now) + +def decode_list(announce): + return '\n'.join(l[0] for l in announce) + + +command = sys.argv[1] +procname = "mctorrent_" + command + +g = globals() +if not g.has_key(procname): + logger.critical("Unknown command %s", command) + sys.exit(1) + +torrent = decode_torrent() + +try: + g[procname]() +except SystemExit: + raise +except: + logger.exception("Error during run") diff --git a/torrent-ANNOUNCE b/torrent-ANNOUNCE new file mode 100644 index 0000000..0182ec3 --- /dev/null +++ b/torrent-ANNOUNCE @@ -0,0 +1,27 @@ +Torrent Virtual FileSystem for Midnight Commander + + +WHAT IS IT + View files, directories and meta information from a torrent metafile in +Midnight Commander. + + +WHAT'S NEW in version 1.0.0 (2010-11-11) + Initial release. + + +WHERE TO GET + Master site: http://phd.pp.ru/Software/mc/ + + Mirrors: http://phd.by.ru/Software/mc/ + http://phd.webhost.ru/Software/mc/ + + +AUTHOR + Oleg Broytman + +COPYRIGHT + Copyright (C) 2010 PhiloSoft Design + +LICENSE + GPL