docker-offlineimap/offlineimap/repository/Base.py

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# Base repository support
# Copyright (C) 2002-2012 John Goerzen & contributors
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#
# 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.
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#
# 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
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import re
import os.path
import traceback
from sys import exc_info
from offlineimap import CustomConfig
from offlineimap.ui import getglobalui
from offlineimap.error import OfflineImapError
class BaseRepository(CustomConfig.ConfigHelperMixin, object):
def __init__(self, reposname, account):
self.ui = getglobalui()
self.account = account
self.config = account.getconfig()
self.name = reposname
self.localeval = account.getlocaleval()
self._accountname = self.account.getname()
self._readonly = self.getconfboolean('readonly', False)
self.uiddir = os.path.join(self.config.getmetadatadir(), 'Repository-' + self.name)
if not os.path.exists(self.uiddir):
os.mkdir(self.uiddir, 0o700)
self.mapdir = os.path.join(self.uiddir, 'UIDMapping')
if not os.path.exists(self.mapdir):
os.mkdir(self.mapdir, 0o700)
self.uiddir = os.path.join(self.uiddir, 'FolderValidity')
if not os.path.exists(self.uiddir):
os.mkdir(self.uiddir, 0o700)
self.nametrans = lambda foldername: foldername
self.folderfilter = lambda foldername: 1
self.folderincludes = []
self.foldersort = None
if self.config.has_option(self.getsection(), 'nametrans'):
self.nametrans = self.localeval.eval(
self.getconf('nametrans'), {'re': re})
if self.config.has_option(self.getsection(), 'folderfilter'):
self.folderfilter = self.localeval.eval(
self.getconf('folderfilter'), {'re': re})
if self.config.has_option(self.getsection(), 'folderincludes'):
self.folderincludes = self.localeval.eval(
self.getconf('folderincludes'), {'re': re})
if self.config.has_option(self.getsection(), 'foldersort'):
self.foldersort = self.localeval.eval(
self.getconf('foldersort'), {'re': re})
def restore_atime(self):
"""Sets folders' atime back to their values after a sync
Controlled by the 'restoreatime' config parameter (default
False), applies only to local Maildir mailboxes and does nothing
on all other repository types."""
pass
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def connect(self):
"""Establish a connection to the remote, if necessary. This exists
so that IMAP connections can all be established up front, gathering
passwords as needed. It was added in order to support the
error recovery -- we need to connect first outside of the error
trap in order to validate the password, and that's the point of
this function."""
pass
def holdordropconnections(self):
pass
def dropconnections(self):
pass
def getaccount(self):
return self.account
def getname(self):
return self.name
def __str__(self):
return self.name
@property
def accountname(self):
"""Account name as string"""
return self._accountname
def getuiddir(self):
return self.uiddir
def getmapdir(self):
return self.mapdir
# Interface from CustomConfig.ConfigHelperMixin
def getsection(self):
return 'Repository ' + self.name
# Interface from CustomConfig.ConfigHelperMixin
def getconfig(self):
return self.config
@property
def readonly(self):
"""Is the repository readonly?"""
return self._readonly
def getlocaleval(self):
return self.account.getlocaleval()
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def getfolders(self):
"""Returns a list of ALL folders on this server."""
return []
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def forgetfolders(self):
"""Forgets the cached list of folders, if any. Useful to run
after a sync run."""
pass
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def getsep(self):
raise NotImplementedError
def should_sync_folder(self, fname):
"""Should this folder be synced?"""
return fname in self.folderincludes or self.folderfilter(fname)
def get_create_folders(self):
"""Is folder creation enabled on this repository?
It is disabled by either setting the whole repository
'readonly' or by using the 'createfolders' setting."""
return (not self._readonly) and \
self.getconfboolean('createfolders', True)
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def makefolder(self, foldername):
"""Create a new folder"""
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raise NotImplementedError
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def deletefolder(self, foldername):
raise NotImplementedError
def getfolder(self, foldername):
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raise NotImplementedError
def sync_folder_structure(self, dst_repo, status_repo):
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"""Syncs the folders in this repository to those in dest.
It does NOT sync the contents of those folders. nametrans rules
in both directions will be honored, but there are NO checks yet
that forward and backward nametrans actually match up!
Configuring nametrans on BOTH repositories therefore could lead
to infinite folder creation cycles."""
if not self.get_create_folders() and not dst_repo.get_create_folders():
# quick exit if no folder creation is enabled on either side.
return
src_repo = self
src_folders = src_repo.getfolders()
dst_folders = dst_repo.getfolders()
# Do we need to refresh the folder list afterwards?
src_haschanged, dst_haschanged = False, False
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# Create hashes with the names, but convert the source folders
# to the dest folder's sep.
src_hash = {}
for folder in src_folders:
src_hash[folder.getvisiblename().replace(
src_repo.getsep(), dst_repo.getsep())] = folder
dst_hash = {}
for folder in dst_folders:
dst_hash[folder.getvisiblename().replace(
dst_repo.getsep(), src_repo.getsep())] = folder
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# Find new folders on src_repo.
for src_name_t, src_folder in src_hash.iteritems():
# Don't create on dst_repo, if it is readonly
if not dst_repo.get_create_folders():
break
if src_folder.sync_this and not src_name_t in dst_folders:
Patch for error handling / separation of accounts etc. Dear All, I have made the attached patch to try and make offlineimap a bit more stable in challenging situations. It's extremely useful in slow connection environments - but sometimes if one account had the wrong password or the connection went down then unfortunately the whole program would crash. I have tested this on our connection and tried throwing at it just about every situation - connection, up down, up, down again, change password, error whilst copying one message, etc. I have been running this patch for the last 5 days or so syncing 6 accounts at the moment... It seems to work and stay alive nicely (even if your connection does not)... Hope that this can go in for the next release... Please let me know if anyone notices any problems with this... Regards, -Mike -- Attached file included as plaintext by Ecartis -- -- File: submit From 1d6777cab23637eb830031c7cab0ae9b8589afd6 Mon Sep 17 00:00:00 2001 From: mike <mike@mikelaptop.(none)> Date: Mon, 24 Aug 2009 19:37:59 +0430 Subject: [PATCH] This patch attempts to introduce a little more error handling - e.g. if one account has an error because of a changed password or something that should not affect the other accounts. Specifically: If one sync run has an issue this is in a try-except clause - if it has an auto refresh period the thread will sleep and try again - this could be quite useful in the event of the connection going down for a little while, changed password etc. If one folder cannot be created an error message will be displayed through the UI and the program will continue (e.g. permission denied to create a folder) If one message does not want to copy for whatever resaon an error message will be displayed through the UI and at least the other messages will be copied If one folder run has an exception then the others will still run
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try:
dst_repo.makefolder(src_name_t)
dst_haschanged = True # Need to refresh list
except OfflineImapError as e:
self.ui.error(e, exc_info()[2],
"Creating folder %s on repository %s" %\
(src_name_t, dst_repo))
raise
status_repo.makefolder(src_name_t.replace(dst_repo.getsep(),
status_repo.getsep()))
# Find new folders on dst_repo.
for dst_name_t, dst_folder in dst_hash.iteritems():
if not src_repo.get_create_folders():
# Don't create missing folder on readonly repo.
break
if dst_folder.sync_this and not dst_name_t in src_folders:
# nametrans sanity check!
# Does nametrans back&forth lead to identical names?
# 1) would src repo filter out the new folder name? In this
# case don't create it on it:
if not self.should_sync_folder(dst_name_t):
self.ui.debug('', "Not creating folder '%s' (repository '%s"
"') as it would be filtered out on that repository." %
(dst_name_t, self))
continue
# get IMAPFolder and see if the reverse nametrans
# works fine TODO: getfolder() works only because we
# succeed in getting inexisting folders which I would
# like to change. Take care!
folder = self.getfolder(dst_name_t)
# apply reverse nametrans to see if we end up with the same name
newdst_name = folder.getvisiblename().replace(
src_repo.getsep(), dst_repo.getsep())
if dst_folder.name != newdst_name:
raise OfflineImapError("INFINITE FOLDER CREATION DETECTED! "
"Folder '%s' (repository '%s') would be created as fold"
"er '%s' (repository '%s'). The latter becomes '%s' in "
"return, leading to infinite folder creation cycles.\n "
"SOLUTION: 1) Do set your nametrans rules on both repos"
"itories so they lead to identical names if applied bac"
"k and forth. 2) Use folderfilter settings on a reposit"
"ory to prevent some folders from being created on the "
"other side." % (dst_folder.name, dst_repo, dst_name_t,
src_repo, newdst_name),
OfflineImapError.ERROR.REPO)
# end sanity check, actually create the folder
try:
src_repo.makefolder(dst_name_t)
src_haschanged = True # Need to refresh list
except OfflineImapError as e:
self.ui.error(e, exc_info()[2], "Creating folder %s on "
"repository %s" % (dst_name_t, src_repo))
raise
status_repo.makefolder(dst_name_t.replace(
src_repo.getsep(), status_repo.getsep()))
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# Find deleted folders.
# TODO: We don't delete folders right now.
#Forget old list of cached folders so we get new ones if needed
if src_haschanged:
self.forgetfolders()
if dst_haschanged:
dst_repo.forgetfolders()
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def startkeepalive(self):
"""The default implementation will do nothing."""
pass
def stopkeepalive(self):
"""Stop keep alive, but don't bother waiting
for the threads to terminate."""
pass
def getlocalroot(self):
""" Local root folder for storing messages.
Will not be set for remote repositories."""
return None