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# -*- coding: utf-8 -*-
# imap.py
# Copyright (C) 2013-2015 LEAP
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
IMAP service initialization
"""
import logging
import os
from twisted.internet import reactor
from twisted.internet.error import CannotListenError
from twisted.internet.protocol import ServerFactory
from twisted.mail import imap4
from twisted.python import log
logger = logging.getLogger(__name__)
from leap.common import events as leap_events
from leap.common.check import leap_assert, leap_assert_type, leap_check
from leap.keymanager import KeyManager
from leap.mail.imap.account import IMAPAccount
from leap.mail.imap.fetch import LeapIncomingMail
from leap.mail.imap.server import LEAPIMAPServer
from leap.soledad.client import Soledad
from leap.common.events.events_pb2 import IMAP_SERVICE_STARTED
from leap.common.events.events_pb2 import IMAP_SERVICE_FAILED_TO_START
DO_MANHOLE = os.environ.get("LEAP_MAIL_MANHOLE", None)
if DO_MANHOLE:
from leap.mail.imap.service import manhole
DO_PROFILE = os.environ.get("LEAP_PROFILE", None)
if DO_PROFILE:
import cProfile
log.msg("Starting PROFILING...")
PROFILE_DAT = "/tmp/leap_mail_profile.pstats"
pr = cProfile.Profile()
pr.enable()
# The default port in which imap service will run
IMAP_PORT = 1984
# The period between succesive checks of the incoming mail
# queue (in seconds)
INCOMING_CHECK_PERIOD = 60
class IMAPAuthRealm(object):
"""
Dummy authentication realm. Do not use in production!
"""
theAccount = None
def requestAvatar(self, avatarId, mind, *interfaces):
return imap4.IAccount, self.theAccount, lambda: None
class LeapIMAPFactory(ServerFactory):
"""
Factory for a IMAP4 server with soledad remote sync and gpg-decryption
capabilities.
"""
def __init__(self, uuid, userid, soledad):
"""
Initializes the server factory.
:param uuid: user uuid
:type uuid: str
:param userid: user id (user@provider.org)
:type userid: str
:param soledad: soledad instance
:type soledad: Soledad
"""
self._uuid = uuid
self._userid = userid
self._soledad = soledad
theAccount = IMAPAccount(uuid, soledad)
self.theAccount = theAccount
# XXX how to pass the store along?
def buildProtocol(self, addr):
"""
Return a protocol suitable for the job.
:param addr: remote ip address
:type addr: str
"""
# XXX addr not used??!
imapProtocol = LEAPIMAPServer(
uuid=self._uuid,
userid=self._userid,
soledad=self._soledad)
imapProtocol.theAccount = self.theAccount
imapProtocol.factory = self
return imapProtocol
def doStop(self):
"""
Stops imap service (fetcher, factory and port).
"""
# TODO should wait for all the pending deferreds,
# the twisted way!
if DO_PROFILE:
log.msg("Stopping PROFILING")
pr.disable()
pr.dump_stats(PROFILE_DAT)
return ServerFactory.doStop(self)
def run_service(*args, **kwargs):
"""
Main entry point to run the service from the client.
:returns: the LoopingCall instance that will have to be stoppped
before shutting down the client, the port as returned by
the reactor when starts listening, and the factory for
the protocol.
"""
leap_assert(len(args) == 2)
soledad, keymanager = args
leap_assert_type(soledad, Soledad)
leap_assert_type(keymanager, KeyManager)
port = kwargs.get('port', IMAP_PORT)
check_period = kwargs.get('check_period', INCOMING_CHECK_PERIOD)
userid = kwargs.get('userid', None)
leap_check(userid is not None, "need an user id")
offline = kwargs.get('offline', False)
uuid = soledad.uuid
factory = LeapIMAPFactory(uuid, userid, soledad)
try:
tport = reactor.listenTCP(port, factory,
interface="localhost")
if not offline:
# FIXME --- update after meskio's work
fetcher = LeapIncomingMail(
keymanager,
soledad,
factory.theAccount,
check_period,
userid)
else:
fetcher = None
except CannotListenError:
logger.error("IMAP Service failed to start: "
"cannot listen in port %s" % (port,))
except Exception as exc:
logger.error("Error launching IMAP service: %r" % (exc,))
else:
# all good.
# (the caller has still to call fetcher.start_loop)
if DO_MANHOLE:
# TODO get pass from env var.too.
manhole_factory = manhole.getManholeFactory(
{'f': factory,
'a': factory.theAccount,
'gm': factory.theAccount.getMailbox},
"boss", "leap")
reactor.listenTCP(manhole.MANHOLE_PORT, manhole_factory,
interface="127.0.0.1")
logger.debug("IMAP4 Server is RUNNING in port %s" % (port,))
leap_events.signal(IMAP_SERVICE_STARTED, str(port))
# FIXME -- change service signature
return fetcher, tport, factory
# not ok, signal error.
leap_events.signal(IMAP_SERVICE_FAILED_TO_START, str(port))
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