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
|
# Copyright (C) 2001 Python Software Foundation
# Author: barry@zope.com (Barry Warsaw)
"""Miscellaneous utilities.
"""
import time
import re
from rfc822 import unquote, quote, parseaddr
from rfc822 import dump_address_pair
from rfc822 import AddrlistClass as _AddrlistClass
from rfc822 import parsedate_tz, parsedate, mktime_tz
from quopri import decodestring as _qdecode
import base64
# Intrapackage imports
from Encoders import _bencode, _qencode
COMMASPACE = ', '
UEMPTYSTRING = u''
# Helpers
def _identity(s):
return s
def _bdecode(s):
if not s:
return s
# We can't quite use base64.encodestring() since it tacks on a "courtesy
# newline". Blech!
if not s:
return s
hasnewline = (s[-1] == '\n')
value = base64.decodestring(s)
if not hasnewline and value[-1] == '\n':
return value[:-1]
return value
def getaddresses(fieldvalues):
"""Return a list of (REALNAME, EMAIL) for each fieldvalue."""
all = COMMASPACE.join(fieldvalues)
a = _AddrlistClass(all)
return a.getaddrlist()
ecre = re.compile(r'''
=\? # literal =?
(?P<charset>[^?]*?) # non-greedy up to the next ? is the charset
\? # literal ?
(?P<encoding>[qb]) # either a "q" or a "b", case insensitive
\? # literal ?
(?P<atom>.*?) # non-greedy up to the next ?= is the atom
\?= # literal ?=
''', re.VERBOSE | re.IGNORECASE)
def decode(s):
"""Return a decoded string according to RFC 2047, as a unicode string."""
rtn = []
parts = ecre.split(s, 1)
while parts:
# If there are less than 4 parts, it can't be encoded and we're done
if len(parts) < 5:
rtn.extend(parts)
break
# The first element is any non-encoded leading text
rtn.append(parts[0])
charset = parts[1]
encoding = parts[2].lower()
atom = parts[3]
# The next chunk to decode should be in parts[4]
parts = ecre.split(parts[4])
# The encoding must be either `q' or `b', case-insensitive
if encoding == 'q':
func = _qdecode
elif encoding == 'b':
func = _bdecode
else:
func = _identity
# Decode and get the unicode in the charset
rtn.append(unicode(func(atom), charset))
# Now that we've decoded everything, we just need to join all the parts
# together into the final string.
return UEMPTYSTRING.join(rtn)
def encode(s, charset='iso-8859-1', encoding='q'):
"""Encode a string according to RFC 2047."""
encoding = encoding.lower()
if encoding == 'q':
estr = _qencode(s)
elif encoding == 'b':
estr = _bencode(s)
else:
raise ValueError, 'Illegal encoding code: ' + encoding
return '=?%s?%s?%s?=' % (charset.lower(), encoding, estr)
def formatdate(timeval=None, localtime=0):
"""Returns a date string as specified by RFC 2822, e.g.:
Fri, 09 Nov 2001 01:08:47 -0000
Optional timeval if given is a floating point time value as accepted by
gmtime() and localtime(), otherwise the current time is used.
Optional localtime is a flag that when true, interprets timeval, and
returns a date relative to the local timezone instead of UTC, properly
taking daylight savings time into account.
"""
# Note: we cannot use strftime() because that honors the locale and RFC
# 2822 requires that day and month names be the English abbreviations.
if timeval is None:
timeval = time.time()
if localtime:
now = time.localtime(timeval)
# Calculate timezone offset, based on whether the local zone has
# daylight savings time, and whether DST is in effect.
if time.daylight and now[-1]:
offset = time.altzone
else:
offset = time.timezone
hours, minutes = divmod(abs(offset), 3600)
# Remember offset is in seconds west of UTC, but the timezone is in
# minutes east of UTC, so the signs differ.
if offset > 0:
sign = '-'
else:
sign = '+'
zone = '%s%02d%02d' % (sign, hours, minutes / 60)
else:
now = time.gmtime(timeval)
# Timezone offset is always -0000
zone = '-0000'
return '%s, %02d %s %04d %02d:%02d:%02d %s' % (
['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'][now[6]],
now[2],
['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][now[1] - 1],
now[0], now[3], now[4], now[5],
zone)
|
