1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
# Copyright (C) 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""If the user wishes it, do not send duplicates of the same message.
This module keeps an in-memory dictionary of Message-ID: and recipient pairs.
If a message with an identical Message-ID: is about to be sent to someone who
has already received a copy, we either drop the message, add a duplicate
warning header, or pass it through, depending on the user's preferences.
"""
from Mailman import mm_cfg
from email.Utils import getaddresses, formataddr
def process(mlist, msg, msgdata):
recips = msgdata['recips']
# Short circuit
if not recips:
return
# Seed this set with addresses we don't care about dup avoiding
explicit_recips = {}
listaddrs = [mlist.GetListEmail(), mlist.GetBouncesEmail(),
mlist.GetOwnerEmail(), mlist.GetRequestEmail()]
for addr in listaddrs:
explicit_recips[addr] = 1
# Figure out the set of explicit recipients
ccaddrs = {}
for header in ('to', 'cc', 'resent-to', 'resent-cc'):
addrs = getaddresses(msg.get_all(header, []))
if header == 'cc':
for name, addr in addrs:
ccaddrs[addr] = name, addr
for name, addr in addrs:
if not addr:
continue
# Ignore the list addresses for purposes of dup avoidance
explicit_recips[addr] = 1
# Now strip out the list addresses
for addr in listaddrs:
del explicit_recips[addr]
if not explicit_recips:
# No one was explicitly addressed, so we can't do any dup collapsing
return
newrecips = []
for r in recips:
# If this recipient is explicitly addressed...
if explicit_recips.has_key(r):
send_duplicate = 1
# If the member wants to receive duplicates, or if the recipient
# is not a member at all, just flag the X-Mailman-Duplicate: yes
# header.
if mlist.isMember(r) and \
mlist.getMemberOption(r, mm_cfg.DontReceiveDuplicates):
send_duplicate = 0
# We'll send a duplicate unless the user doesn't wish it. If
# personalization is enabled, the add-dupe-header flag will add a
# X-Mailman-Duplicate: yes header for this user's message.
if send_duplicate:
msgdata.setdefault('add-dup-header', {})[r] = 1
newrecips.append(r)
elif ccaddrs.has_key(r):
del ccaddrs[r]
else:
# Otherwise, this is the first time they've been in the recips
# list. Add them to the newrecips list and flag them as having
# received this message.
newrecips.append(r)
# Set the new list of recipients
msgdata['recips'] = newrecips
del msg['cc']
for item in ccaddrs.values():
msg['cc'] = formataddr(item)
|
