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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
# Copyright (C) 1998-2005 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.
"""Decorate a message by sticking the header and footer around it."""
from types import ListType
from email.MIMEText import MIMEText
from Mailman import mm_cfg
from Mailman import Utils
from Mailman import Errors
from Mailman.Message import Message
from Mailman.i18n import _
from Mailman.SafeDict import SafeDict
from Mailman.Logging.Syslog import syslog
try:
True, False
except:
True = 1
False = 0
def process(mlist, msg, msgdata):
# Digests and Mailman-craft messages should not get additional headers
if msgdata.get('isdigest') or msgdata.get('nodecorate'):
return
d = {}
if msgdata.get('personalize'):
# Calculate the extra personalization dictionary. Note that the
# length of the recips list better be exactly 1.
recips = msgdata.get('recips')
assert type(recips) == ListType and len(recips) == 1
member = recips[0].lower()
d['user_address'] = member
try:
d['user_delivered_to'] = mlist.getMemberCPAddress(member)
# BAW: Hmm, should we allow this?
d['user_password'] = mlist.getMemberPassword(member)
d['user_language'] = mlist.getMemberLanguage(member)
username = mlist.getMemberName(member) or None
try:
username = username.encode(Utils.GetCharSet(d['user_language']))
except (AttributeError, UnicodeError):
username = member
d['user_name'] = username
d['user_optionsurl'] = mlist.GetOptionsURL(member)
except Errors.NotAMemberError:
pass
# These strings are descriptive for the log file and shouldn't be i18n'd
header = decorate(mlist, mlist.msg_header, 'non-digest header', d)
footer = decorate(mlist, mlist.msg_footer, 'non-digest footer', d)
# Escape hatch if both the footer and header are empty
if not header and not footer:
return
# Be MIME smart here. We only attach the header and footer by
# concatenation when the message is a non-multipart of type text/plain.
# Otherwise, if it is not a multipart, we make it a multipart, and then we
# add the header and footer as text/plain parts.
#
# BJG: In addition, only add the footer if the message's character set
# matches the charset of the list's preferred language. This is a
# suboptimal solution, and should be solved by allowing a list to have
# multiple headers/footers, for each language the list supports.
#
# Also, if the list's preferred charset is us-ascii, we can always
# safely add the header/footer to a plain text message since all
# charsets Mailman supports are strict supersets of us-ascii --
# no, UTF-16 emails are not supported yet.
#
# TK: Message with 'charset=' cause trouble. So, instead of
# mgs.get_content_charset('us-ascii') ...
mcset = msg.get_content_charset() or 'us-ascii'
lcset = Utils.GetCharSet(mlist.preferred_language)
msgtype = msg.get_content_type()
# BAW: If the charsets don't match, should we add the header and footer by
# MIME multipart chroming the message?
wrap = True
if not msg.is_multipart() and msgtype == 'text/plain':
# TK: Try to keep the message plain by converting the header/
# footer/oldpayload into unicode and encode with mcset/lcset.
# Try to decode qp/base64 also.
uheader = unicode(header, lcset)
ufooter = unicode(footer, lcset)
try:
oldpayload = unicode(msg.get_payload(decode=1), mcset)
frontsep = endsep = u''
if header and not header.endswith('\n'):
frontsep = u'\n'
if footer and not oldpayload.endswith('\n'):
endsep = u'\n'
payload = uheader + frontsep + oldpayload + endsep + ufooter
try:
# first, try encode with list charset
payload = payload.encode(lcset)
newcset = lcset
except UnicodeError:
if lcset != mcset:
# if fail, encode with message charset (if different)
payload = payload.encode(mcset)
newcset = mcset
# if this fails, fallback to outer try and wrap=true
del msg['content-transfer-encoding']
del msg['content-type']
msg.set_payload(payload, newcset)
wrap = False
except (LookupError, UnicodeError):
pass
elif msg.get_type() == 'multipart/mixed':
# The next easiest thing to do is just prepend the header and append
# the footer as additional subparts
payload = msg.get_payload()
if not isinstance(payload, ListType):
payload = [payload]
if footer:
mimeftr = MIMEText(footer, 'plain', lcset)
mimeftr['Content-Disposition'] = 'inline'
payload.append(mimeftr)
if header:
mimehdr = MIMEText(header, 'plain', lcset)
mimehdr['Content-Disposition'] = 'inline'
payload.insert(0, mimehdr)
msg.set_payload(payload)
wrap = False
# If we couldn't add the header or footer in a less intrusive way, we can
# at least do it by MIME encapsulation. We want to keep as much of the
# outer chrome as possible.
if not wrap:
return
# Because of the way Message objects are passed around to process(), we
# need to play tricks with the outer message -- i.e. the outer one must
# remain the same instance. So we're going to create a clone of the outer
# message, with all the header chrome intact, then copy the payload to it.
# This will give us a clone of the original message, and it will form the
# basis of the interior, wrapped Message.
inner = Message()
# Which headers to copy? Let's just do the Content-* headers
for h, v in msg.items():
if h.lower().startswith('content-'):
inner[h] = v
inner.set_payload(msg.get_payload())
# For completeness
inner.set_unixfrom(msg.get_unixfrom())
inner.preamble = msg.preamble
inner.epilogue = msg.epilogue
# Don't copy get_charset, as this might be None, even if
# get_content_charset isn't. However, do make sure there is a default
# content-type, even if the original message was not MIME.
inner.set_default_type(msg.get_default_type())
# BAW: HACK ALERT.
if hasattr(msg, '__version__'):
inner.__version__ = msg.__version__
# Now, play games with the outer message to make it contain three
# subparts: the header (if any), the wrapped message, and the footer (if
# any).
payload = [inner]
if header:
mimehdr = MIMEText(header, 'plain', lcset)
mimehdr['Content-Disposition'] = 'inline'
payload.insert(0, mimehdr)
if footer:
mimeftr = MIMEText(footer, 'plain', lcset)
mimeftr['Content-Disposition'] = 'inline'
payload.append(mimeftr)
msg.set_payload(payload)
del msg['content-type']
del msg['content-transfer-encoding']
del msg['content-disposition']
msg['Content-Type'] = 'multipart/mixed'
def decorate(mlist, template, what, extradict={}):
# `what' is just a descriptive phrase used in the log message
#
# BAW: We've found too many situations where Python can be fooled into
# interpolating too much revealing data into a format string. For
# example, a footer of "% silly %(real_name)s" would give a header
# containing all list attributes. While we've previously removed such
# really bad ones like `password' and `passwords', it's much better to
# provide a whitelist of known good attributes, then to try to remove a
# blacklist of known bad ones.
d = SafeDict({'real_name' : mlist.real_name,
'list_name' : mlist.internal_name(),
# For backwards compatibility
'_internal_name': mlist.internal_name(),
'host_name' : mlist.host_name,
'web_page_url' : mlist.web_page_url,
'description' : mlist.description,
'info' : mlist.info,
'cgiext' : mm_cfg.CGIEXT,
})
d.update(extradict)
# Using $-strings?
if getattr(mlist, 'use_dollar_strings', 0):
template = Utils.to_percent(template)
# Interpolate into the template
try:
text = (template % d).replace('\r\n', '\n')
except (ValueError, TypeError), e:
syslog('error', 'Exception while calculating %s:\n%s', what, e)
what = what.upper()
text = template
return text
|
