Source code for duplicity.backends.ncftpbackend

# -*- Mode:Python; indent-tabs-mode:nil; tab-width:4 -*-
#
# Copyright 2002 Ben Escoto <ben@emerose.org>
# Copyright 2007 Kenneth Loafman <kenneth@loafman.com>
#
# This file is part of duplicity.
#
# Duplicity is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# Duplicity is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with duplicity; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

import os.path
import urllib
import re

import duplicity.backend
from duplicity import globals
from duplicity import log
from duplicity import tempdir


[docs]class NCFTPBackend(duplicity.backend.Backend): """Connect to remote store using File Transfer Protocol""" def __init__(self, parsed_url): duplicity.backend.Backend.__init__(self, parsed_url) # we expect an error return, so go low-level and ignore it try: p = os.popen("ncftpls -v") fout = p.read() ret = p.close() except Exception: pass # the expected error is 8 in the high-byte and some output if ret != 0x0800 or not fout: log.FatalError("NcFTP not found: Please install NcFTP version 3.1.9 or later", log.ErrorCode.ftp_ncftp_missing) # version is the second word of the first line version = fout.split('\n')[0].split()[1] if version < "3.1.9": log.FatalError("NcFTP too old: Duplicity requires NcFTP version 3.1.9," "3.2.1 or later. Version 3.2.0 will not work properly.", log.ErrorCode.ftp_ncftp_too_old) elif version == "3.2.0": log.Warn("NcFTP (ncftpput) version 3.2.0 may fail with duplicity.\n" "see: http://www.ncftpd.com/ncftp/doc/changelog.html\n" "If you have trouble, please upgrade to 3.2.1 or later", log.WarningCode.ftp_ncftp_v320) log.Notice("NcFTP version is %s" % version) self.parsed_url = parsed_url self.url_string = duplicity.backend.strip_auth_from_url(self.parsed_url) # strip ncftp+ prefix self.url_string = duplicity.backend.strip_prefix(self.url_string, 'ncftp') # This squelches the "file not found" result from ncftpls when # the ftp backend looks for a collection that does not exist. # version 3.2.2 has error code 5, 1280 is some legacy value self.popen_breaks['ncftpls'] = [5, 1280] # Use an explicit directory name. if self.url_string[-1] != '/': self.url_string += '/' self.password = self.get_password() if globals.ftp_connection == 'regular': self.conn_opt = '-E' else: self.conn_opt = '-F' self.tempfile, self.tempname = tempdir.default().mkstemp() os.write(self.tempfile, "host %s\n" % self.parsed_url.hostname) os.write(self.tempfile, "user %s\n" % self.parsed_url.username) os.write(self.tempfile, "pass %s\n" % self.password) os.close(self.tempfile) self.flags = "-f %s %s -t %s -o useCLNT=0,useHELP_SITE=0 " % \ (self.tempname, self.conn_opt, globals.timeout) if parsed_url.port is not None and parsed_url.port != 21: self.flags += " -P '%s'" % (parsed_url.port) def _put(self, source_path, remote_filename): remote_path = os.path.join(urllib.unquote(re.sub('^/', '', self.parsed_url.path)), remote_filename).rstrip() commandline = "ncftpput %s -m -V -C '%s' '%s'" % \ (self.flags, source_path.name, remote_path) self.subprocess_popen(commandline) def _get(self, remote_filename, local_path): remote_path = os.path.join(urllib.unquote(re.sub('^/', '', self.parsed_url.path)), remote_filename).rstrip() commandline = "ncftpget %s -V -C '%s' '%s' '%s'" % \ (self.flags, self.parsed_url.hostname, remote_path.lstrip('/'), local_path.name) self.subprocess_popen(commandline) def _list(self): # Do a long listing to avoid connection reset commandline = "ncftpls %s -l '%s'" % (self.flags, self.url_string) _, l, _ = self.subprocess_popen(commandline) # Look for our files as the last element of a long list line return [x.split()[-1] for x in l.split('\n') if x and not x.startswith("total ")] def _delete(self, filename): commandline = "ncftpls %s -l -X 'DELE %s' '%s'" % \ (self.flags, filename, self.url_string) self.subprocess_popen(commandline)
duplicity.backend.register_backend("ncftp+ftp", NCFTPBackend) duplicity.backend.uses_netloc.extend(['ncftp+ftp'])