root / snf-webproject / synnefo / webproject / middleware / cleanse.py @ beb2b785
History | View | Annotate | Download (3.7 kB)
1 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
from django.conf import settings |
35 |
from django.core.exceptions import MiddlewareNotUsed |
36 |
|
37 |
from django.core import mail |
38 |
from django.views import debug |
39 |
|
40 |
import re |
41 |
|
42 |
HIDDEN_ALL = settings.HIDDEN_COOKIES + settings.HIDDEN_HEADERS |
43 |
|
44 |
|
45 |
def mail_admins_safe(subject, message, fail_silently=False, connection=None): |
46 |
'''
|
47 |
Wrapper function to cleanse email body from sensitive content before
|
48 |
sending it
|
49 |
'''
|
50 |
new_msg = ""
|
51 |
|
52 |
if len(message) > settings.MAIL_MAX_LEN: |
53 |
new_msg += "Mail size over limit (truncated)\n\n"
|
54 |
message = message[:settings.MAIL_MAX_LEN] |
55 |
|
56 |
for line in message.splitlines(): |
57 |
# Lines of interest in the mail are in the form of
|
58 |
# key:value.
|
59 |
try:
|
60 |
(key, value) = line.split(':', 1) |
61 |
except ValueError: |
62 |
new_msg += line + '\n'
|
63 |
continue
|
64 |
|
65 |
new_msg += key + ':'
|
66 |
|
67 |
# Special case when the first header / cookie printed
|
68 |
# (prefixed by 'META:{' or 'COOKIES:{') needs to be hidden.
|
69 |
if value.startswith('{'): |
70 |
try:
|
71 |
(newkey, newval) = value.split(':', 1) |
72 |
except ValueError: |
73 |
new_msg += value + '\n'
|
74 |
continue
|
75 |
|
76 |
new_msg += newkey + ':'
|
77 |
key = newkey.lstrip('{')
|
78 |
value = newval |
79 |
|
80 |
if key.strip(" '") not in HIDDEN_ALL: |
81 |
new_msg += value + '\n'
|
82 |
continue
|
83 |
|
84 |
# Append value[-1] to the clensed string, so that commas / closing
|
85 |
# brackets are printed correctly.
|
86 |
# (it will 'eat up' the closing bracket if the header is the last one
|
87 |
# printed)
|
88 |
new_msg += ' ' + '*'*8 + value[-1] + '\n' |
89 |
|
90 |
return mail.mail_admins_plain(subject, new_msg, fail_silently, connection)
|
91 |
|
92 |
|
93 |
class CleanseSettingsMiddleware(object): |
94 |
'''
|
95 |
Prevent django from printing sensitive information (paswords, tokens
|
96 |
etc), when handling server errors (for both DEBUG and no-DEBUG
|
97 |
deployments.
|
98 |
'''
|
99 |
def __init__(self): |
100 |
debug.HIDDEN_SETTINGS = re.compile(settings.HIDDEN_SETTINGS) |
101 |
|
102 |
if not hasattr(mail, 'mail_admins_plain'): |
103 |
mail.mail_admins_plain = mail.mail_admins |
104 |
mail.mail_admins = mail_admins_safe |
105 |
|
106 |
raise MiddlewareNotUsed('cleanse settings') |