# Copyright (C) 2003 John Goerzen # # # 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 from offlineimap import threadutil, mbnames, CustomConfig import offlineimap.repository.Base, offlineimap.repository.LocalStatus from offlineimap.ui import UIBase from offlineimap.threadutil import InstanceLimitedThread, ExitNotifyThread from subprocess import Popen, PIPE from threading import Event, Lock import os from Queue import Queue, Empty import sys class SigListener(Queue): def __init__(self): self.folderlock = Lock() self.folders = None Queue.__init__(self, 20) def put_nowait(self, sig): self.folderlock.acquire() try: if sig == 1: if self.folders is None or not self.autorefreshes: # folders haven't yet been added, or this account is once-only; drop signal return elif self.folders: for foldernr in range(len(self.folders)): # requeue folder self.folders[foldernr][1] = True self.quick = False return # else folders have already been cleared, put signal... finally: self.folderlock.release() Queue.put_nowait(self, sig) def addfolders(self, remotefolders, autorefreshes, quick): self.folderlock.acquire() try: self.folders = [] self.quick = quick self.autorefreshes = autorefreshes for folder in remotefolders: # new folders are queued self.folders.append([folder, True]) finally: self.folderlock.release() def clearfolders(self): self.folderlock.acquire() try: for folder, queued in self.folders: if queued: # some folders still in queue return False self.folders[:] = [] return True finally: self.folderlock.release() def queuedfolders(self): self.folderlock.acquire() try: dirty = True while dirty: dirty = False for foldernr, (folder, queued) in enumerate(self.folders): if queued: # mark folder as no longer queued self.folders[foldernr][1] = False dirty = True quick = self.quick self.folderlock.release() yield (folder, quick) self.folderlock.acquire() finally: self.folderlock.release() def getaccountlist(customconfig): return customconfig.getsectionlist('Account') def AccountListGenerator(customconfig): return [Account(customconfig, accountname) for accountname in getaccountlist(customconfig)] def AccountHashGenerator(customconfig): retval = {} for item in AccountListGenerator(customconfig): retval[item.getname()] = item return retval mailboxes = [] class Account(CustomConfig.ConfigHelperMixin): def __init__(self, config, name): self.config = config self.name = name self.metadatadir = config.getmetadatadir() self.localeval = config.getlocaleval() self.ui = UIBase.getglobalui() self.refreshperiod = self.getconffloat('autorefresh', 0.0) self.quicknum = 0 if self.refreshperiod == 0.0: self.refreshperiod = None def getlocaleval(self): return self.localeval def getconfig(self): return self.config def getname(self): return self.name def getsection(self): return 'Account ' + self.getname() def sleeper(self, siglistener): """Sleep handler. Returns same value as UIBase.sleep: 0 if timeout expired, 1 if there was a request to cancel the timer, and 2 if there is a request to abort the program. Also, returns 100 if configured to not sleep at all.""" if not self.refreshperiod: return 100 kaobjs = [] if hasattr(self, 'localrepos'): kaobjs.append(self.localrepos) if hasattr(self, 'remoterepos'): kaobjs.append(self.remoterepos) for item in kaobjs: item.startkeepalive() refreshperiod = int(self.refreshperiod * 60) # try: # sleepresult = siglistener.get_nowait() # # retrieved signal before sleep started # if sleepresult == 1: # # catching signal 1 here means folders were cleared before signal was posted # pass # except Empty: # sleepresult = self.ui.sleep(refreshperiod, siglistener) sleepresult = self.ui.sleep(refreshperiod, siglistener) if sleepresult == 1: self.quicknum = 0 # Cancel keepalive for item in kaobjs: item.stopkeepalive() return sleepresult class AccountSynchronizationMixin: def syncrunner(self, siglistener): self.ui.registerthread(self.name) self.ui.acct(self.name) accountmetadata = self.getaccountmeta() if not os.path.exists(accountmetadata): os.mkdir(accountmetadata, 0700) self.remoterepos = offlineimap.repository.Base.LoadRepository(self.getconf('remoterepository'), self, 'remote') # Connect to the local repository. self.localrepos = offlineimap.repository.Base.LoadRepository(self.getconf('localrepository'), self, 'local') # Connect to the local cache. self.statusrepos = offlineimap.repository.LocalStatus.LocalStatusRepository(self.getconf('localrepository'), self) #might need changes here to ensure that one account sync does not crash others... if not self.refreshperiod: try: self.sync(siglistener) except: self.ui.warn("Error occured attempting to sync account " + self.name \ + ": " + str(sys.exc_info()[1])) finally: self.ui.acctdone(self.name) return looping = 1 while looping: try: self.sync(siglistener) except: self.ui.warn("Error occured attempting to sync account " + self.name \ + ": " + str(sys.exc_info()[1])) finally: looping = self.sleeper(siglistener) != 2 self.ui.acctdone(self.name) def getaccountmeta(self): return os.path.join(self.metadatadir, 'Account-' + self.name) def sync(self, siglistener): # We don't need an account lock because syncitall() goes through # each account once, then waits for all to finish. hook = self.getconf('presynchook', '') self.callhook(hook) quickconfig = self.getconfint('quick', 0) if quickconfig < 0: quick = True elif quickconfig > 0: if self.quicknum == 0 or self.quicknum > quickconfig: self.quicknum = 1 quick = False else: self.quicknum = self.quicknum + 1 quick = True else: quick = False try: remoterepos = self.remoterepos localrepos = self.localrepos statusrepos = self.statusrepos self.ui.syncfolders(remoterepos, localrepos) remoterepos.syncfoldersto(localrepos, [statusrepos]) siglistener.addfolders(remoterepos.getfolders(), bool(self.refreshperiod), quick) while True: folderthreads = [] for remotefolder, quick in siglistener.queuedfolders(): thread = InstanceLimitedThread(\ instancename = 'FOLDER_' + self.remoterepos.getname(), target = syncfolder, name = "Folder sync %s[%s]" % \ (self.name, remotefolder.getvisiblename()), args = (self.name, remoterepos, remotefolder, localrepos, statusrepos, quick)) thread.setDaemon(1) thread.start() folderthreads.append(thread) threadutil.threadsreset(folderthreads) if siglistener.clearfolders(): break mbnames.write() localrepos.forgetfolders() remoterepos.forgetfolders() localrepos.holdordropconnections() remoterepos.holdordropconnections() finally: pass hook = self.getconf('postsynchook', '') self.callhook(hook) def callhook(self, cmd): if not cmd: return try: self.ui.callhook("Calling hook: " + cmd) p = Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True) r = p.communicate() self.ui.callhook("Hook stdout: %s\nHook stderr:%s\n" % r) self.ui.callhook("Hook return code: %d" % p.returncode) except: self.ui.warn("Exception occured while calling hook") class SyncableAccount(Account, AccountSynchronizationMixin): pass def syncfolder(accountname, remoterepos, remotefolder, localrepos, statusrepos, quick): global mailboxes ui = UIBase.getglobalui() ui.registerthread(accountname) try: # Load local folder. localfolder = localrepos.\ getfolder(remotefolder.getvisiblename().\ replace(remoterepos.getsep(), localrepos.getsep())) # Write the mailboxes mbnames.add(accountname, localfolder.getvisiblename()) # Load status folder. statusfolder = statusrepos.getfolder(remotefolder.getvisiblename().\ replace(remoterepos.getsep(), statusrepos.getsep())) if localfolder.getuidvalidity() == None: # This is a new folder, so delete the status cache to be sure # we don't have a conflict. statusfolder.deletemessagelist() statusfolder.cachemessagelist() if quick: if not localfolder.quickchanged(statusfolder) \ and not remotefolder.quickchanged(statusfolder): ui.skippingfolder(remotefolder) localrepos.restore_atime() return # Load local folder ui.syncingfolder(remoterepos, remotefolder, localrepos, localfolder) ui.loadmessagelist(localrepos, localfolder) localfolder.cachemessagelist() ui.messagelistloaded(localrepos, localfolder, len(localfolder.getmessagelist().keys())) # If either the local or the status folder has messages and there is a UID # validity problem, warn and abort. If there are no messages, UW IMAPd # loses UIDVALIDITY. But we don't really need it if both local folders are # empty. So, in that case, just save it off. if len(localfolder.getmessagelist()) or len(statusfolder.getmessagelist()): if not localfolder.isuidvalidityok(): ui.validityproblem(localfolder) localrepos.restore_atime() return if not remotefolder.isuidvalidityok(): ui.validityproblem(remotefolder) localrepos.restore_atime() return else: localfolder.saveuidvalidity() remotefolder.saveuidvalidity() # Load remote folder. ui.loadmessagelist(remoterepos, remotefolder) remotefolder.cachemessagelist() ui.messagelistloaded(remoterepos, remotefolder, len(remotefolder.getmessagelist().keys())) # if not statusfolder.isnewfolder(): # Delete local copies of remote messages. This way, # if a message's flag is modified locally but it has been # deleted remotely, we'll delete it locally. Otherwise, we # try to modify a deleted message's flags! This step # need only be taken if a statusfolder is present; otherwise, # there is no action taken *to* the remote repository. remotefolder.syncmessagesto_delete(localfolder, [localfolder, statusfolder]) ui.syncingmessages(localrepos, localfolder, remoterepos, remotefolder) localfolder.syncmessagesto(statusfolder, [remotefolder, statusfolder]) # Synchronize remote changes. ui.syncingmessages(remoterepos, remotefolder, localrepos, localfolder) remotefolder.syncmessagesto(localfolder, [localfolder, statusfolder]) # Make sure the status folder is up-to-date. ui.syncingmessages(localrepos, localfolder, statusrepos, statusfolder) localfolder.syncmessagesto(statusfolder) statusfolder.save() localrepos.restore_atime() except: ui.warn("ERROR in syncfolder for " + accountname + " folder " + \ remotefolder.getvisiblename() +" : " +str(sys.exc_info()[1]))