1 files changed, 105 insertions, 0 deletions
diff --git a/mailman/Mailbox.py b/mailman/Mailbox.py
new file mode 100644
index 000000000..293259661
--- /dev/null
+++ b/mailman/Mailbox.py
@@ -0,0 +1,105 @@
+# 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