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# Copyright (C) 1998-2008 by the Free Software Foundation, Inc.
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# Copyright (C) 1998-2014 by the Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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charset = 'us-ascii'
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return Header(s, charset, maxlinelen, header_name, continuation_ws)
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def change_header(name, value, mlist, msg, msgdata, delete=True, repl=True):
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if ((msgdata.get('from_is_list') == 2 or
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(msgdata.get('from_is_list') == 0 and mlist.from_is_list == 2)) and
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not msgdata.get('_fasttrack')
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) or name.lower() in ('from', 'reply-to'):
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msgdata.setdefault('add_header', {})[name] = value
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elif repl or not msg.has_key(name):
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def process(mlist, msg, msgdata):
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# Set the "X-Ack: no" header if noack flag is set.
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if msgdata.get('noack'):
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change_header('X-Ack', 'no', mlist, msg, msgdata)
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# Because we're going to modify various important headers in the email
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# message, we want to save some of the information in the msgdata
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# dictionary for later. Specifically, the sender header will get waxed,
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# Mark message so we know we've been here, but leave any existing
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# X-BeenThere's intact.
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msg['X-BeenThere'] = mlist.GetListEmail()
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change_header('X-BeenThere', mlist.GetListEmail(),
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mlist, msg, msgdata, delete=False)
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# Add Precedence: and other useful headers. None of these are standard
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# and finding information on some of them are fairly difficult. Some are
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# just common practice, and we'll add more here as they become necessary.
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# known exploits in a particular version of Mailman and we know a site is
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# using such an old version, they may be vulnerable. It's too easy to
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# edit the code to add a configuration variable to handle this.
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if not msg.has_key('x-mailman-version'):
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msg['X-Mailman-Version'] = mm_cfg.VERSION
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change_header('X-Mailman-Version', mm_cfg.VERSION,
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mlist, msg, msgdata, repl=False)
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# We set "Precedence: list" because this is the recommendation from the
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# sendmail docs, the most authoritative source of this header's semantics.
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if not msg.has_key('precedence'):
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msg['Precedence'] = 'list'
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change_header('Precedence', 'list',
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mlist, msg, msgdata, repl=False)
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# Do we change the from so the list takes ownership of the email
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if (msgdata.get('from_is_list') or mlist.from_is_list) and not fasttrack:
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# Be as robust as possible here.
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faddrs = getaddresses(msg.get_all('from', []))
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# Strip the nulls and bad emails.
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faddrs = [x for x in faddrs if x[1].find('@') > 0]
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realname, email = o_from = faddrs[0]
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# No From: or multiple addresses. Just punt and take
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# the get_sender result.
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email = msgdata['original_sender']
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o_from = (realname, email)
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if mlist.isMember(email):
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realname = mlist.getMemberName(email) or email
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# Remove domain from realname if it looks like an email address
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realname = re.sub(r'@([^ .]+\.)+[^ .]+$', '---', realname)
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change_header('From',
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formataddr(('%s via %s' % (realname, mlist.real_name),
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mlist.GetListEmail())),
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# Reply-To: munging. Do not do this if the message is "fast tracked",
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# meaning it is internally crafted and delivered to a specific user. BAW:
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# Yuck, I really hate this feature but I've caved under the sheer pressure
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orig = msg.get_all('reply-to', [])
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for pair in getaddresses(orig):
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# We also need to put the old From: in Reply-To: in all cases.
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# Set Reply-To: header to point back to this list. Add this last
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# because some folks think that some MUAs make it easier to delete
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# addresses from the right than from the left.
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if mlist.reply_goes_to_list == 1:
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i18ndesc = uheader(mlist, mlist.description, 'Reply-To')
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add((str(i18ndesc), mlist.GetListEmail()))
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# Don't put Reply-To: back if there's nothing to add!
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msg['Reply-To'] = COMMASPACE.join(
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[formataddr(pair) for pair in new])
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change_header('Reply-To',
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COMMASPACE.join([formataddr(pair) for pair in new]),
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# The To field normally contains the list posting address. However
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# when messages are fully personalized, that header will get
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# overwritten with the address of the recipient. We need to get the
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# Also skip Cc if this is an anonymous list as list posting address
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# is already in From and Reply-To in this case.
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if mlist.personalize == 2 and mlist.reply_goes_to_list <> 1 \
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and not mlist.anonymous_list:
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# We do add the Cc in cases where From: header munging is being done
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# because even though the list address is in From:, the Reply-To:
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# poster will override it. Brain dead MUAs may then address the list
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# twice on a 'reply all', but reasonable MUAs should do the right
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if (mlist.personalize == 2 and mlist.reply_goes_to_list <> 1 and
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not mlist.anonymous_list):
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# Watch out for existing Cc headers, merge, and remove dups. Note
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# that RFC 2822 says only zero or one Cc header is allowed.
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for pair in getaddresses(msg.get_all('cc', [])):
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# AvoidDuplicates may have set a new Cc: in msgdata.add_header,
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if (msgdata.has_key('add_header') and
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msgdata['add_header'].has_key('Cc')):
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for pair in getaddresses([msgdata['add_header']['Cc']]):
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for pair in getaddresses(msg.get_all('cc', [])):
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i18ndesc = uheader(mlist, mlist.description, 'Cc')
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add((str(i18ndesc), mlist.GetListEmail()))
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msg['Cc'] = COMMASPACE.join([formataddr(pair) for pair in new])
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COMMASPACE.join([formataddr(pair) for pair in new]),
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# Add list-specific headers as defined in RFC 2369 and RFC 2919, but only
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# if the message is being crafted for a specific list (e.g. not for the
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# password reminders).
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# without desc we need to ensure the MUST brackets
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listid_h = '<%s>' % listid
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# We always add a List-ID: header.
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msg['List-Id'] = listid_h
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change_header('List-Id', listid_h, mlist, msg, msgdata)
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# For internally crafted messages, we also add a (nonstandard),
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# "X-List-Administrivia: yes" header. For all others (i.e. those coming
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# from list posts), we add a bunch of other RFC 2369 headers.
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# Add this header if we're archiving
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if mlist.archive:
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archiveurl = mlist.GetBaseArchiveURL()
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if archiveurl.endswith('/'):
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archiveurl = archiveurl[:-1]
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headers['List-Archive'] = '<%s>' % archiveurl
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# First we delete any pre-existing headers because the RFC permits only
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# one copy of each, and we want to be sure it's ours.
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for h, v in headers.items():
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# Wrap these lines if they are too long. 78 character width probably
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# shouldn't be hardcoded, but is at least text-MUA friendly. The
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# adding of 2 is for the colon-space separator.
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if len(h) + 2 + len(v) > 78:
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v = CONTINUATION.join(v.split(', '))
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change_header(h, v, mlist, msg, msgdata)
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old_style = mm_cfg.OLD_STYLE_PREFIXING
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subject = re.sub(prefix_pattern, '', subject)
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rematch = re.match('((RE|AW|SV|VS)(\[\d+\])?:\s*)+', subject, re.I)
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rematch = re.match('((RE|AW|SV|VS)\s*(\[\d+\])?\s*:\s*)+', subject, re.I)
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subject = subject[rematch.end():]
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h = u' '.join([prefix, subject])
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h = h.encode('us-ascii')
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h = uheader(mlist, h, 'Subject', continuation_ws=ws)
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change_header('Subject', h, mlist, msg, msgdata)
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ss = u' '.join([recolon, subject])
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ss = ss.encode('us-ascii')
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ss = uheader(mlist, ss, 'Subject', continuation_ws=ws)
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# TK: Subject is concatenated and unicode string.
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subject = subject.encode(cset, 'replace')
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h.append(subject, cset)
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change_header('Subject', h, mlist, msg, msgdata)
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ss = uheader(mlist, recolon, 'Subject', continuation_ws=ws)
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ss.append(subject, cset)
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msgdata['stripped_subject'] = ss
added
removed
Mailman/Handlers/CookHeaders.py
