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authorBarry Warsaw2008-02-27 01:26:18 -0500
committerBarry Warsaw2008-02-27 01:26:18 -0500
commita1c73f6c305c7f74987d99855ba59d8fa823c253 (patch)
tree65696889450862357c9e05c8e9a589f1bdc074ac /Mailman/Mailbox.py
parent3f31f8cce369529d177cfb5a7c66346ec1e12130 (diff)
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-# Copyright (C) 1998-2008 by the Free Software Foundation, Inc.
-#
-# 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
-"""Extend mailbox.UnixMailbox.
-"""
-
-import sys
-import email
-import mailbox
-
-from email.Errors import MessageParseError
-from email.Generator import Generator
-from email.Parser import Parser
-
-from Mailman.Message import Message
-from Mailman.configuration import config
-
-
-
-def _safeparser(fp):
- try:
- return email.message_from_file(fp, Message)
- except MessageParseError:
- # Don't return None since that will stop a mailbox iterator
- return ''
-
-
-
-class Mailbox(mailbox.PortableUnixMailbox):
- def __init__(self, fp):
- mailbox.PortableUnixMailbox.__init__(self, fp, _safeparser)
-
- # msg should be an rfc822 message or a subclass.
- def AppendMessage(self, msg):
- # Check the last character of the file and write a newline if it isn't
- # a newline (but not at the beginning of an empty file).
- try:
- self.fp.seek(-1, 2)
- except IOError, e:
- # Assume the file is empty. We can't portably test the error code
- # returned, since it differs per platform.
- pass
- else:
- if self.fp.read(1) <> '\n':
- self.fp.write('\n')
- # Seek to the last char of the mailbox
- self.fp.seek(1, 2)
- # Create a Generator instance to write the message to the file
- g = Generator(self.fp)
- g.flatten(msg, unixfrom=True)
- # Add one more trailing newline for separation with the next message
- # to be appended to the mbox.
- print >> self.fp
-
-
-
-# This stuff is used by pipermail.py:processUnixMailbox(). It provides an
-# opportunity for the built-in archiver to scrub archived messages of nasty
-# things like attachments and such...
-def _archfactory(mailbox):
- # The factory gets a file object, but it also needs to have a MailList
- # object, so the clearest <wink> way to do this is to build a factory
- # function that has a reference to the mailbox object, which in turn holds
- # a reference to the mailing list. Nested scopes would help here, BTW,
- # but we can't rely on them being around (e.g. Python 2.0).
- def scrubber(fp, mailbox=mailbox):
- msg = _safeparser(fp)
- if msg == '':
- return msg
- return mailbox.scrub(msg)
- return scrubber
-
-
-class ArchiverMailbox(Mailbox):
- # This is a derived class which is instantiated with a reference to the
- # MailList object. It is build such that the factory calls back into its
- # scrub() method, giving the scrubber module a chance to do its thing
- # before the message is archived.
- def __init__(self, fp, mlist):
- if config.ARCHIVE_SCRUBBER:
- __import__(config.ARCHIVE_SCRUBBER)
- self._scrubber = sys.modules[config.ARCHIVE_SCRUBBER].process
- else:
- self._scrubber = None
- self._mlist = mlist
- mailbox.PortableUnixMailbox.__init__(self, fp, _archfactory(self))
-
- def scrub(self, msg):
- if self._scrubber:
- return self._scrubber(self._mlist, msg)
- else:
- return msg