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# Copyright (C) 1998,1999,2000 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.
"Extend mailbox.UnixMailbox."
import string
import re
import errno
import mailbox
class Mailbox(mailbox.UnixMailbox):
# a better regexp than the Python 1.5.2 default
_fromlinepattern = r'From \s*\S+\s+\w\w\w\s+\w\w\w\s+\d\d?\s+' \
r'\d\d?:\d\d(:\d\d)?(\s+\S+)?\s+\d\d\d\d\s*$'
_regexp = re.compile(_fromlinepattern)
def _isrealfromline(self, line):
return self._regexp.match(line)
# msg should be an rfc822 message or a subclass.
def AppendMessage(self, msg):
# Check the last character of the file and write a newline if it isn't
# a newline (but not at the beginning of an empty file.
try:
self.fp.seek(-1, 2)
except IOError, e:
# Assume the file is empty. We can't portably test the error code
# returned, since it differs per platform.
pass
else:
if self.fp.read(1) <> '\n':
self.fp.write('\n')
# seek to the last char of the mailbox
self.fp.seek(1, 2)
self.fp.write(msg.unixfrom)
for line in msg.headers:
self.fp.write(line)
if not msg.body or msg.body[0] <> '\n':
self.fp.write('\n')
# Quote unprotected From_ lines appearing in the body
for line in string.split(msg.body, '\n'):
if line[:5] == 'From ' and self._isrealfromline(line):
self.fp.write('>')
self.fp.write(line + '\n')
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