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________________________________
De: Python-list <python-list-bounces+alexandra_mel.1981=hotmail...@python.org>
en nombre de Chris Green <c...@isbd.net>
Enviado: Wednesday, August 26, 2020 5:10:35 PM
Para: python-list@python.org <python-list@python.org>
Asunto: Another 2 to 3 mail encoding problem
I'm unearthing a few issues here trying to convert my mail filter and
delivery programs from 2 to 3!
I have a simple[ish] local mbox mail delivery module as follows:-
import mailbox
import logging
import logging.handlers
import os
import time
#
#
# Class derived from mailbox.mbox so we can override _pre_message_hook()
# to do nothing instead of appending a blank line
#
class mymbox(mailbox.mbox):
def _pre_message_hook(self, f):
"""Don't write the blank line before the 'From '"""
pass
#
#
# log a message
#
def initLog(name):
log = logging.getLogger(name)
log.setLevel(logging.DEBUG)
f = logging.handlers.RotatingFileHandler("/home/chris/tmp/mail.log",
'a', 1000000, 4)
f.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s -
%(message)s')
f.setFormatter(formatter)
log.addHandler(f)
return log
#
#
# Deliver a message to a local mbox
#
def deliverMboxMsg(dest, msg, log):
#
#
# Create the destination mbox instance
#
mbx = mymbox(dest, factory=None)
log.info("From: " + msg.get("From", "unknown"))
log.info("Destination is: " + dest)
#
#
# Lock the mbox while we append to it
#
for tries in range(3):
try:
mbx.lock()
#
#
# Append the incoming message to the appropriate mbox
#
mbx.add(msg)
#
#
# now set the modified time later than the access time (which
is 'now') so
# that mutt will see new mail in the mbox.
#
os.utime(dest, ((time.time()), (time.time() + 5)))
mbx.unlock()
break
except mailbox.ExternalClashError:
log.info("Destination locked, try " + str(tries))
time.sleep(1)
else: # get here if we ran out of tries
log.warn("Failed to lock destination after 3 attempts, giving up")
return
It has run faultlessly for many years under Python 2. I've now
changed the calling program to Python 3 and while it handles most
E-Mail OK I have just got the following error:-
Traceback (most recent call last):
File "/home/chris/.mutt/bin/filter.py", line 102, in <module>
mailLib.deliverMboxMsg(dest, msg, log)
File "/home/chris/.mutt/bin/mailLib.py", line 52, in deliverMboxMsg
mbx.add(msg)
File "/usr/lib/python3.8/mailbox.py", line 603, in add
self._toc[self._next_key] = self._append_message(message)
File "/usr/lib/python3.8/mailbox.py", line 758, in _append_message
offsets = self._install_message(message)
File "/usr/lib/python3.8/mailbox.py", line 830, in _install_message
self._dump_message(message, self._file, self._mangle_from_)
File "/usr/lib/python3.8/mailbox.py", line 215, in _dump_message
gen.flatten(message)
File "/usr/lib/python3.8/email/generator.py", line 116, in flatten
self._write(msg)
File "/usr/lib/python3.8/email/generator.py", line 181, in _write
self._dispatch(msg)
File "/usr/lib/python3.8/email/generator.py", line 214, in _dispatch
meth(msg)
File "/usr/lib/python3.8/email/generator.py", line 432, in _handle_text
super(BytesGenerator,self)._handle_text(msg)
File "/usr/lib/python3.8/email/generator.py", line 249, in _handle_text
self._write_lines(payload)
File "/usr/lib/python3.8/email/generator.py", line 155, in _write_lines
self.write(line)
File "/usr/lib/python3.8/email/generator.py", line 406, in write
self._fp.write(s.encode('ascii', 'surrogateescape'))
UnicodeEncodeError: 'ascii' codec can't encode character '\ufeff' in
position 4: ordinal not in range(128)
So what do I need to do to the message I'm adding with mbx.add(msg) to
fix this? (I assume that's what I need to do).
--
Chris Green
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