# IMAP folder support
# Copyright (C) 2002-2004 John Goerzen
# <jgoerzen@complete.org>
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from Base import BaseFolder
from offlineimap import imaputil, imaplib
from offlineimap.ui import UIBase
from offlineimap.version import versionstr
import rfc822, time, string, random, binascii, re
from StringIO import StringIO
from copy import copy
class IMAPFolder(BaseFolder):
def __init__(self, imapserver, name, visiblename, accountname, repository):
self.config = imapserver.config
self.expunge = repository.getexpunge()
self.name = imaputil.dequote(name)
self.root = None # imapserver.root
self.sep = imapserver.delim
self.imapserver = imapserver
self.messagelist = None
self.visiblename = visiblename
self.accountname = accountname
self.repository = repository
self.randomgenerator = random.Random()
BaseFolder.__init__(self)
def getaccountname(self):
return self.accountname
def suggeststhreads(self):
return 1
def waitforthread(self):
self.imapserver.connectionwait()
def getcopyinstancelimit(self):
return 'MSGCOPY_' + self.repository.getname()
def getvisiblename(self):
return self.visiblename
def getuidvalidity(self):
imapobj = self.imapserver.acquireconnection()
try:
# Primes untagged_responses
imapobj.select(self.getfullname(), readonly = 1)
return long(imapobj.untagged_responses['UIDVALIDITY'][0])
finally:
self.imapserver.releaseconnection(imapobj)
def cachemessagelist(self):
imapobj = self.imapserver.acquireconnection()
self.messagelist = {}
try:
# Primes untagged_responses
imapobj.select(self.getfullname(), readonly = 1, force = 1)
try:
# Some mail servers do not return an EXISTS response if
# the folder is empty.
maxmsgid = long(imapobj.untagged_responses['EXISTS'][0])
except KeyError:
return
if maxmsgid < 1:
# No messages; return
return
# Now, get the flags and UIDs for these.
# We could conceivably get rid of maxmsgid and just say
# '1:*' here.
response = imapobj.fetch('1:%d' % maxmsgid, '(FLAGS UID)')[1]
finally:
self.imapserver.releaseconnection(imapobj)
for messagestr in response:
# Discard the message number.
messagestr = string.split(messagestr, maxsplit = 1)[1]
options = imaputil.flags2hash(messagestr)
if not options.has_key('UID'):
UIBase.getglobalui().warn('No UID in message with options %s' %\
str(options),
minor = 1)
else:
uid = long(options['UID'])
flags = imaputil.flagsimap2maildir(options['FLAGS'])
self.messagelist[uid] = {'uid': uid, 'flags': flags}
def getmessagelist(self):
return self.messagelist
def getmessage(self, uid):
ui = UIBase.getglobalui()
imapobj = self.imapserver.acquireconnection()
try:
imapobj.select(self.getfullname(), readonly = 1)
initialresult = imapobj.uid('fetch', '%d' % uid, '(BODY.PEEK[])')
ui.debug('imap', 'Returned object from fetching %d: %s' % \
(uid, str(initialresult)))
return initialresult[1][0][1].replace("\r\n", "\n")
finally:
self.imapserver.releaseconnection(imapobj)
def getmessageflags(self, uid):
return self.messagelist[uid]['flags']
def savemessage_getnewheader(self, content):
headername = 'X-OfflineIMAP-%s-' % str(binascii.crc32(content)).replace('-', 'x')
headername += binascii.hexlify(self.repository.getname()) + '-'
headername += binascii.hexlify(self.getname())
headervalue= '%d-' % long(time.time())
headervalue += str(self.randomgenerator.random()).replace('.', '')
headervalue += '-v' + versionstr
return (headername, headervalue)
def savemessage_addheader(self, content, headername, headervalue):
ui = UIBase.getglobalui()
ui.debug('imap',
'savemessage_addheader: called to add %s: %s' % (headername,
headervalue))
insertionpoint = content.find("\r\n")
ui.debug('imap', 'savemessage_addheader: insertionpoint = %d' % insertionpoint)
leader = content[0:insertionpoint]
ui.debug('imap', 'savemessage_addheader: leader = %s' % repr(leader))
if insertionpoint == 0 or insertionpoint == -1:
newline = ''
insertionpoint = 0
else:
newline = "\r\n"
newline += "%s: %s" % (headername, headervalue)
ui.debug('imap', 'savemessage_addheader: newline = ' + repr(newline))
trailer = content[insertionpoint:]
ui.debug('imap', 'savemessage_addheader: trailer = ' + repr(trailer))
return leader + newline + trailer
def savemessage_searchforheader(self, imapobj, headername, headervalue):
if imapobj.untagged_responses.has_key('APPENDUID'):
return long(imapobj.untagged_responses['APPENDUID'][-1].split(' ')[1])
ui = UIBase.getglobalui()
ui.debug('imap', 'savemessage_searchforheader called for %s: %s' % \
(headername, headervalue))
# Now find the UID it got.
headervalue = imapobj._quote(headervalue)
try:
matchinguids = imapobj.uid('search', None,
'(HEADER %s %s)' % (headername, headervalue))[1][0]
except imapobj.error:
# IMAP server doesn't implement search or had a problem.
return 0
ui.debug('imap', 'savemessage_searchforheader got initial matchinguids: ' + repr(matchinguids))
matchinguids = matchinguids.split(' ')
ui.debug('imap', 'savemessage_searchforheader: matchinguids now ' + \
repr(matchinguids))
if len(matchinguids) != 1 or matchinguids[0] == None:
raise ValueError, "While attempting to find UID for message with header %s, got wrong-sized matchinguids of %s" % (headername, str(matchinguids))
matchinguids.sort()
return long(matchinguids[0])
def savemessage(self, uid, content, flags):
imapobj = self.imapserver.acquireconnection()
ui = UIBase.getglobalui()
ui.debug('imap', 'savemessage: called')
try:
try:
imapobj.select(self.getfullname()) # Needed for search
except imapobj.readonly:
ui.msgtoreadonly(self, uid, content, flags)
# Return indicating message taken, but no UID assigned.
# Fudge it.
return 0
# This backend always assigns a new uid, so the uid arg is ignored.
# In order to get the new uid, we need to save off the message ID.
message = rfc822.Message(StringIO(content))
datetuple = rfc822.parsedate(message.getheader('Date'))
# Will be None if missing or not in a valid format.
if datetuple == None:
datetuple = time.localtime()
try:
if datetuple[0] < 1981:
raise ValueError
# This could raise a value error if it's not a valid format.
date = imaplib.Time2Internaldate(datetuple)
except ValueError:
# Argh, sometimes it's a valid format but year is 0102
# or something. Argh. It seems that Time2Internaldate
# will rause a ValueError if the year is 0102 but not 1902,
# but some IMAP servers nonetheless choke on 1902.
date = imaplib.Time2Internaldate(time.localtime())
ui.debug('imap', 'savemessage: using date ' + str(date))
content = re.sub("(?<!\r)\n", "\r\n", content)
ui.debug('imap', 'savemessage: initial content is: ' + repr(content))
(headername, headervalue) = self.savemessage_getnewheader(content)
ui.debug('imap', 'savemessage: new headers are: %s: %s' % \
(headername, headervalue))
content = self.savemessage_addheader(content, headername,
headervalue)
ui.debug('imap', 'savemessage: new content is: ' + repr(content))
ui.debug('imap', 'savemessage: new content length is ' + \
str(len(content)))
assert(imapobj.append(self.getfullname(),
imaputil.flagsmaildir2imap(flags),
date, content)[0] == 'OK')
# Checkpoint. Let it write out the messages, etc.
assert(imapobj.check()[0] == 'OK')
# Keep trying until we get the UID.
try:
ui.debug('imap', 'savemessage: first attempt to get new UID')
uid = self.savemessage_searchforheader(imapobj, headername,
headervalue)
except ValueError:
ui.debug('imap', 'savemessage: first attempt to get new UID failed. Going to run a NOOP and try again.')
assert(imapobj.noop()[0] == 'OK')
uid = self.savemessage_searchforheader(imapobj, headername,
headervalue)
finally:
self.imapserver.releaseconnection(imapobj)
self.messagelist[uid] = {'uid': uid, 'flags': flags}
ui.debug('imap', 'savemessage: returning %d' % uid)
return uid
def savemessageflags(self, uid, flags):
imapobj = self.imapserver.acquireconnection()
try:
try:
imapobj.select(self.getfullname())
except imapobj.readonly:
UIBase.getglobalui().flagstoreadonly(self, [uid], flags)
return
result = imapobj.uid('store', '%d' % uid, 'FLAGS',
imaputil.flagsmaildir2imap(flags))
assert result[0] == 'OK', 'Error with store: ' + r[1]
finally:
self.imapserver.releaseconnection(imapobj)
result = result[1][0]
if not result:
self.messagelist[uid]['flags'] = flags
else:
flags = imaputil.flags2hash(imaputil.imapsplit(result)[1])['FLAGS']
self.messagelist[uid]['flags'] = imaputil.flagsimap2maildir(flags)
def addmessageflags(self, uid, flags):
self.addmessagesflags([uid], flags)
def addmessagesflags_noconvert(self, uidlist, flags):
self.processmessagesflags('+', uidlist, flags)
def addmessagesflags(self, uidlist, flags):
"""This is here for the sake of UIDMaps.py -- deletemessages must
add flags and get a converted UID, and if we don't have noconvert,
then UIDMaps will try to convert it twice."""
self.addmessagesflags_noconvert(uidlist, flags)
def deletemessageflags(self, uid, flags):
self.deletemessagesflags([uid], flags)
def deletemessagesflags(self, uidlist, flags):
self.processmessagesflags('-', uidlist, flags)
def processmessagesflags(self, operation, uidlist, flags):
if len(uidlist) > 101:
# Hack for those IMAP ervers with a limited line length
self.processmessagesflags(operation, uidlist[:100], flags)
self.processmessagesflags(operation, uidlist[100:], flags)
return
imapobj = self.imapserver.acquireconnection()
try:
try:
imapobj.select(self.getfullname())
except imapobj.readonly:
UIBase.getglobalui().flagstoreadonly(self, uidlist, flags)
return
r = imapobj.uid('store',
imaputil.listjoin(uidlist),
operation + 'FLAGS',
imaputil.flagsmaildir2imap(flags))
assert r[0] == 'OK', 'Error with store: ' + r[1]
r = r[1]
finally:
self.imapserver.releaseconnection(imapobj)
# Some IMAP servers do not always return a result. Therefore,
# only update the ones that it talks about, and manually fix
# the others.
needupdate = copy(uidlist)
for result in r:
if result == None:
# Compensate for servers that don't return anything from
# STORE.
continue
attributehash = imaputil.flags2hash(imaputil.imapsplit(result)[1])
if not ('UID' in attributehash and 'FLAGS' in attributehash):
# Compensate for servers that don't return a UID attribute.
continue
flags = attributehash['FLAGS']
uid = long(attributehash['UID'])
self.messagelist[uid]['flags'] = imaputil.flagsimap2maildir(flags)
try:
needupdate.remove(uid)
except ValueError: # Let it slide if it's not in the list
pass
for uid in needupdate:
if operation == '+':
for flag in flags:
if not flag in self.messagelist[uid]['flags']:
self.messagelist[uid]['flags'].append(flag)
self.messagelist[uid]['flags'].sort()
elif operation == '-':
for flag in flags:
if flag in self.messagelist[uid]['flags']:
self.messagelist[uid]['flags'].remove(flag)
def deletemessage(self, uid):
self.deletemessages_noconvert([uid])
def deletemessages(self, uidlist):
self.deletemessages_noconvert(uidlist)
def deletemessages_noconvert(self, uidlist):
# Weed out ones not in self.messagelist
uidlist = [uid for uid in uidlist if uid in self.messagelist]
if not len(uidlist):
return
self.addmessagesflags_noconvert(uidlist, ['T'])
imapobj = self.imapserver.acquireconnection()
try:
try:
imapobj.select(self.getfullname())
except imapobj.readonly:
UIBase.getglobalui().deletereadonly(self, uidlist)
return
if self.expunge:
assert(imapobj.expunge()[0] == 'OK')
finally:
self.imapserver.releaseconnection(imapobj)
for uid in uidlist:
del self.messagelist[uid]