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
|
# Copyright (C) 1998 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 0211-1307, USA.
"""Embody incoming and outgoing messages as objects."""
__version__ = "$Revision: 539 $"
import sys
import rfc822, string, time
# A utility function 2 of these classes use:
def AddBackNewline(str):
return str + '\n'
# XXX klm - use the standard lib StringIO module instead of FakeFile.
# If we're trying to create a message object from text, we need to pass
# a file object to rfc822.Message to get it to do its magic. Well,
# to avoid writing text out to a file, and having it read back in,
# here we define a class that will fool rfc822 into thinking it's a
# non-seekable message.
# The only method rfc822.Message ever calls on a non-seekable file is
# readline. It doesn't use the optional arg to readline, either.
# In my subclasses, I use the read() method, and might just use readlines()
# someday.
#
# It might be useful to expand this into a full blown fully functional class.
class FakeFile:
def __init__(self, text):
self.lines = map(AddBackNewline, string.split(text, '\n'))
self.curline = 0
self.lastline = len(self.lines) - 1
def readline(self):
if self.curline > self.lastline:
return ''
self.curline = self.curline + 1
return self.lines[self.curline - 1]
def read(self):
startline = self.curline
self.curline = self.lastline + 1
return string.join(self.lines[startline:], '')
def readlines(self):
startline = self.curline
self.curline = self.lastline + 1
return self.lines[startline:]
# We know the message is gonna come in on stdin or from text for our purposes.
class IncomingMessage(rfc822.Message):
def __init__(self, text=None):
if not text:
rfc822.Message.__init__(self, sys.stdin, 0)
self.body = self.fp.read()
else:
rfc822.Message.__init__(self, FakeFile(text), 0)
self.body = self.fp.read()
def GetSender(self):
# Look for a Sender field.
sender = self.getheader('sender')
if sender:
realname, mail_address = self.getaddr('sender')
else:
try:
realname, mail_address = self.getaddr('from')
except:
# The unix from line is all we have left...
if self.unixfrom:
return string.lower(string.split(self.unixfrom)[1])
return string.lower(mail_address)
def GetSenderName(self):
real_name, mail_addr = self.getaddr('from')
if not real_name:
return self.GetSender()
return real_name
def SetHeader(self, name, value, crush_duplicates=1):
# Well, we crush dups in the dict no matter what...
name = "%s%s" % (name[0], name[1:])
self.dict[string.lower(name)] = value
if value[-1] <> '\n':
value = value + '\n'
if not crush_duplicates:
self.headers.append('%s: %s' % (name, value))
return
for i in range(len(self.headers)):
if (string.lower(self.headers[i][:len(name)+1]) ==
string.lower(name) + ':'):
self.headers[i] = '%s: %s' % (name, value)
# XXX Eventually (1.5.1?) Python rfc822.Message() will have its own
# __delitem__.
def __delitem__(self, name):
"""Delete all occurrences of a specific header, if it is present."""
name = string.lower(name)
if not self.dict.has_key(name):
return
del self.dict[name]
name = name + ':'
n = len(name)
list = []
hit = 0
for i in range(len(self.headers)):
line = self.headers[i]
if string.lower(line[:n]) == name:
hit = 1
elif line[:1] not in string.whitespace:
hit = 0
if hit:
list.append(i)
list.reverse()
for i in list:
del self.headers[i]
# This is a simplistic class. It could do multi-line headers etc...
# But it doesn't because I don't need that for this app.
class OutgoingMessage:
def __init__(self, headers=None, body='', sender=None):
self.cached_headers = {}
if headers:
self.SetHeaders(headers)
else:
self.headers = []
self.body = body
self.sender = sender
def SetHeaders(self, headers):
self.headers = map(AddBackNewline, string.split(headers, '\n'))
self.CacheHeaders()
def CacheHeaders(self):
for header in self.headers:
i = string.find(header, ':')
self.cached_headers[string.lower(string.strip(header[:i]))
] = header[i+2:]
def SetHeader(self, header, value, crush_duplicates=1):
if value[-1] <> '\n':
value = value + '\n'
if crush_duplicates:
# Run through the list and make sure header isn't already there.
remove_these = []
for item in self.headers:
f = string.find(item, ':')
if string.lower(item[:f]) == string.lower(header):
remove_these.append(item)
for item in remove_these:
self.headers.remove(item)
del remove_these
self.headers.append('%s%s: %s' % (string.upper(header[0]),
string.lower(header[1:]),
value))
self.cached_headers[string.lower(header)] = value
def SetBody(self, body):
self.body = body
def AppendToBody(self, text):
self.body = self.body + text
def SetSender(self, sender, set_from=1):
self.sender = sender
if not self.getheader('from') and set_from:
self.SetHeader('from', sender)
def SetDate(self, date=time.ctime(time.time())):
self.SetHeader('date', date)
def GetSender(self):
return self.sender
# Lower case the name to give it the same UI as IncomingMessage
# inherits from rfc822
def getheader(self, str):
str = string.lower(str)
if not self.cached_headers.has_key(str):
return None
return self.cached_headers[str]
def __delitem__(self, name):
if not self.getheader(name):
return None
newheaders = []
name = string.lower(name)
nlen = len(name)
for h in self.headers:
if (len(h) > (nlen+1)
and h[nlen] == ":"
and string.lower(h[:nlen]) == name):
continue
newheaders.append(h)
self.headers = newheaders
self.CacheHeaders()
|
