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authorBarry Warsaw2008-02-27 01:26:18 -0500
committerBarry Warsaw2008-02-27 01:26:18 -0500
commita1c73f6c305c7f74987d99855ba59d8fa823c253 (patch)
tree65696889450862357c9e05c8e9a589f1bdc074ac /Mailman/rules/approved.py
parent3f31f8cce369529d177cfb5a7c66346ec1e12130 (diff)
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-# Copyright (C) 2007-2008 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.
-
-"""Look for moderator pre-approval."""
-
-__all__ = ['Approved']
-__metaclass__ = type
-
-
-import re
-from email.iterators import typed_subpart_iterator
-from zope.interface import implements
-
-from Mailman.i18n import _
-from Mailman.interfaces import IRule
-
-
-EMPTYSTRING = u''
-
-
-
-class Approved:
- """Look for moderator pre-approval."""
- implements(IRule)
-
- name = 'approved'
- description = _('The message has a matching Approve or Approved header.')
- record = True
-
- def check(self, mlist, msg, msgdata):
- """See `IRule`."""
- # See if the message has an Approved or Approve header with a valid
- # moderator password. Also look at the first non-whitespace line in
- # the file to see if it looks like an Approved header.
- missing = object()
- password = msg.get('approved', msg.get('approve', missing))
- if password is missing:
- # Find the first text/plain part in the message
- part = None
- stripped = False
- for part in typed_subpart_iterator(msg, 'text', 'plain'):
- break
- payload = part.get_payload(decode=True)
- if payload is not None:
- lines = payload.splitlines(True)
- for lineno, line in enumerate(lines):
- if line.strip() <> '':
- break
- if ':' in line:
- header, value = line.split(':', 1)
- if header.lower() in ('approved', 'approve'):
- password = value.strip()
- # Now strip the first line from the payload so the
- # password doesn't leak.
- del lines[lineno]
- reset_payload(part, EMPTYSTRING.join(lines))
- stripped = True
- if stripped:
- # Now try all the text parts in case it's
- # multipart/alternative with the approved line in HTML or
- # other text part. We make a pattern from the Approved line
- # and delete it from all text/* parts in which we find it. It
- # would be better to just iterate forward, but email
- # compatability for pre Python 2.2 returns a list, not a true
- # iterator.
- #
- # This will process all the multipart/alternative parts in the
- # message as well as all other text parts. We shouldn't find
- # the pattern outside the multipart/alternative parts, but if
- # we do, it is probably best to delete it anyway as it does
- # contain the password.
- #
- # Make a pattern to delete. We can't just delete a line
- # because line of HTML or other fancy text may include
- # additional message text. This pattern works with HTML. It
- # may not work with rtf or whatever else is possible.
- pattern = header + ':(\s|&nbsp;)*' + re.escape(password)
- for part in typed_subpart_iterator(msg, 'text'):
- payload = part.get_payload(decode=True)
- if payload is not None:
- if re.search(pattern, payload):
- reset_payload(part, re.sub(pattern, '', payload))
- else:
- del msg['approved']
- del msg['approve']
- return password is not missing and password == mlist.moderator_password
-
-
-
-def reset_payload(part, payload):
- # Set decoded payload maintaining content-type, charset, format and delsp.
- charset = part.get_content_charset() or 'us-ascii'
- content_type = part.get_content_type()
- format = part.get_param('format')
- delsp = part.get_param('delsp')
- del part['content-transfer-encoding']
- del part['content-type']
- part.set_payload(payload, charset)
- part.set_type(content_type)
- if format:
- part.set_param('Format', format)
- if delsp:
- part.set_param('DelSp', delsp)