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#!/usr/bin/env python
# Copyright (c) 2012
# Lars-Dominik Braun <lars@6xq.net>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import os, re, sys, subprocess, pyinotify
class Classifier (object):
# files in junk are spam
SPAMDIR = re.compile (r'mail/\.Junk/(new|cur)')
# exclude: Unsure messages, temporary directory, trashed messages (see
# http://cr.yp.to/proto/maildir.html), dovecot files
EXCLUDE = re.compile (r'mail/(\.Unsure/(new|cur)|[^/]+/(tmp|.*:2,[A-S]*T[U-Z]*$)|.*dovecot)')
SPAM = 1
HAM = 2
UNSURE = 3
def statusFromFile (self, path):
"""
filter mail through bogofilter and return spam status
"""
ret = subprocess.call (['bogofilter', '-I', path])
if ret == 2:
return self.UNSURE
elif ret == 1:
return self.HAM
elif ret == 0:
return self.SPAM
elif ret == 3:
raise Exception ('bogofilter returned error')
def statusFromPath (self, path):
"""
get spam status from file path
"""
if self.SPAMDIR.search (path):
return self.SPAM
else:
return self.HAM
def isExcluded (self, path):
"""
is path excluded?
"""
return self.EXCLUDE.search (path)
def setStatus (self, curStatus, newStatus, path):
"""
tell bogofilter to set new spam status for message
"""
if curStatus != newStatus:
bogoopts = None
if curStatus == self.UNSURE:
if newStatus == self.HAM:
bogoopts = '-n'
elif newStatus == self.SPAM:
bogoopts = '-s'
elif curStatus == self.SPAM and newStatus == self.HAM:
bogoopts = '-Sn'
elif curStatus == self.HAM and newStatus == self.SPAM:
bogoopts = '-Ns'
print 'bogoopts %s' % bogoopts
ret = subprocess.call (['bogofilter', bogoopts, '-I', path])
print 'bogofilter returned %i' % ret
return True
else:
return False
def updateStatus (self, path):
"""
does all the magic
"""
if self.isExcluded (path):
return False
curStatus = self.statusFromFile (path)
newStatus = self.statusFromPath (path)
return self.setStatus (curStatus, newStatus, path)
class EventHandler(pyinotify.ProcessEvent):
def __init__ (self, wm, mask, classifier):
pyinotify.ProcessEvent.__init__ (self)
self.wm = wm
self.mask = mask
self.classifier = classifier
def process_IN_MOVED_TO (self, event):
self.classifier.updateStatus (event.pathname)
def process_IN_CREATE (self, event):
# make sure new directories are watched as well
if event.mask & pyinotify.IN_ISDIR:
wdd = self.wm.add_watch(event.pathname, self.mask, rec=True)
else:
self.classifier.updateStatus (event.pathname)
if __name__ == '__main__':
c = Classifier ()
wm = pyinotify.WatchManager()
mask = pyinotify.IN_MOVED_TO | pyinotify.IN_CREATE
handler = EventHandler(wm, mask, c)
notifier = pyinotify.Notifier(wm, handler)
wdd = wm.add_watch(os.path.expanduser ('mail/'), mask, rec=True)
notifier.loop()
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