docker-offlineimap/offlineimap/imaplibutil.py
Nicolas Sebrecht 54cff7f786 imaplibutil.py: remove unused imports
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>
2015-01-01 22:23:35 +01:00

200 lines
7.1 KiB
Python

# imaplib utilities
# Copyright (C) 2002-2007 John Goerzen <jgoerzen@complete.org>
# 2012-2012 Sebastian Spaeth <Sebastian@SSpaeth.de>
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import fcntl
import time
import subprocess
import threading
from hashlib import sha1
from offlineimap.ui import getglobalui
from offlineimap import OfflineImapError
from offlineimap.imaplib2 import IMAP4, IMAP4_SSL, zlib, InternalDate, Mon2num
class UsefulIMAPMixIn(object):
def __getselectedfolder(self):
if self.state == 'SELECTED':
return self.mailbox
return None
def select(self, mailbox='INBOX', readonly=False, force = False):
"""Selects a mailbox on the IMAP server
:returns: 'OK' on success, nothing if the folder was already
selected or raises an :exc:`OfflineImapError`"""
if self.__getselectedfolder() == mailbox and self.is_readonly == readonly \
and not force:
# No change; return.
return
# Wipe out all old responses, to maintain semantics with old imaplib2
del self.untagged_responses[:]
try:
result = super(UsefulIMAPMixIn, self).select(mailbox, readonly)
except self.readonly as e:
# pass self.readonly to our callers
raise
except self.abort as e:
# self.abort is raised when we are supposed to retry
errstr = "Server '%s' closed connection, error on SELECT '%s'. Ser"\
"ver said: %s" % (self.host, mailbox, e.args[0])
severity = OfflineImapError.ERROR.FOLDER_RETRY
raise OfflineImapError(errstr, severity)
if result[0] != 'OK':
#in case of error, bail out with OfflineImapError
errstr = "Error SELECTing mailbox '%s', server reply:\n%s" %\
(mailbox, result)
severity = OfflineImapError.ERROR.FOLDER
raise OfflineImapError(errstr, severity)
return result
# Overrides private function from IMAP4 (@imaplib2)
def _mesg(self, s, tn=None, secs=None):
new_mesg(self, s, tn, secs)
class IMAP4_Tunnel(UsefulIMAPMixIn, IMAP4):
"""IMAP4 client class over a tunnel
Instantiate with: IMAP4_Tunnel(tunnelcmd)
tunnelcmd -- shell command to generate the tunnel.
The result will be in PREAUTH stage."""
def __init__(self, tunnelcmd, **kwargs):
IMAP4.__init__(self, tunnelcmd, **kwargs)
def open(self, host, port):
"""The tunnelcmd comes in on host!"""
self.host = host
self.process = subprocess.Popen(host, shell=True, close_fds=True,
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
(self.outfd, self.infd) = (self.process.stdin, self.process.stdout)
# imaplib2 polls on this fd
self.read_fd = self.infd.fileno()
self.set_nonblocking(self.read_fd)
def set_nonblocking(self, fd):
"Mark fd as nonblocking"
# get the file's current flag settings
fl = fcntl.fcntl(fd, fcntl.F_GETFL)
# clear non-blocking mode from flags
fl = fl & ~os.O_NONBLOCK
fcntl.fcntl(fd, fcntl.F_SETFL, fl)
def read(self, size):
"""data = read(size)
Read at most 'size' bytes from remote."""
if self.decompressor is None:
return os.read(self.read_fd, size)
if self.decompressor.unconsumed_tail:
data = self.decompressor.unconsumed_tail
else:
data = os.read(self.read_fd, 8192)
return self.decompressor.decompress(data, size)
def send(self, data):
if self.compressor is not None:
data = self.compressor.compress(data)
data += self.compressor.flush(zlib.Z_SYNC_FLUSH)
self.outfd.write(data)
def shutdown(self):
self.infd.close()
self.outfd.close()
self.process.wait()
def new_mesg(self, s, tn=None, secs=None):
if secs is None:
secs = time.time()
if tn is None:
tn = threading.currentThread().getName()
tm = time.strftime('%M:%S', time.localtime(secs))
getglobalui().debug('imap', ' %s.%02d %s %s' % (tm, (secs*100)%100, tn, s))
class WrappedIMAP4_SSL(UsefulIMAPMixIn, IMAP4_SSL):
"""Improved version of imaplib.IMAP4_SSL overriding select()"""
def __init__(self, *args, **kwargs):
self._fingerprint = kwargs.get('fingerprint', None)
if type(self._fingerprint) != type([]):
self._fingerprint = [self._fingerprint]
if 'fingerprint' in kwargs:
del kwargs['fingerprint']
super(WrappedIMAP4_SSL, self).__init__(*args, **kwargs)
def open(self, host=None, port=None):
if not self.ca_certs and not self._fingerprint:
raise OfflineImapError("No CA certificates " + \
"and no server fingerprints configured. " + \
"You must configure at least something, otherwise " + \
"having SSL helps nothing.", OfflineImapError.ERROR.REPO)
super(WrappedIMAP4_SSL, self).open(host, port)
if self._fingerprint:
# compare fingerprints
fingerprint = sha1(self.sock.getpeercert(True)).hexdigest()
if fingerprint not in self._fingerprint:
raise OfflineImapError("Server SSL fingerprint '%s' " % fingerprint + \
"for hostname '%s' " % host + \
"does not match configured fingerprint(s) %s. " % self._fingerprint + \
"Please verify and set 'cert_fingerprint' accordingly " + \
"if not set yet.", OfflineImapError.ERROR.REPO)
class WrappedIMAP4(UsefulIMAPMixIn, IMAP4):
"""Improved version of imaplib.IMAP4 overriding select()"""
pass
def Internaldate2epoch(resp):
"""Convert IMAP4 INTERNALDATE to UT.
Returns seconds since the epoch.
"""
mo = InternalDate.match(resp)
if not mo:
return None
mon = Mon2num[mo.group('mon')]
zonen = mo.group('zonen')
day = int(mo.group('day'))
year = int(mo.group('year'))
hour = int(mo.group('hour'))
min = int(mo.group('min'))
sec = int(mo.group('sec'))
zoneh = int(mo.group('zoneh'))
zonem = int(mo.group('zonem'))
# INTERNALDATE timezone must be subtracted to get UT
zone = (zoneh*60 + zonem)*60
if zonen == '-':
zone = -zone
tt = (year, mon, day, hour, min, sec, -1, -1, -1)
return time.mktime(tt)