New submission from Mark Sapiro <m...@msapiro.net>:
This is related to https://bugs.python.org/issue27321 but a different exception
is thrown for a different reason. This is caused by a defective spam message. I
don't actually have the offending message from the wild, but the attached
bad_email_2.eml illustrates the problem.
The defect is the message declares the content charset as us-ascii, but the
body contains non-ascii. When the message is parsed into an
email.message.Message object and the objects as_string() method is called,
UnicodeEncodeError is thrown as follows:
>>> import email
>>> with open('bad_email_2.eml', 'rb') as fp:
... msg = email.message_from_binary_file(fp)
...
>>> msg.as_string()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.5/email/message.py", line 159, in as_string
g.flatten(self, unixfrom=unixfrom)
File "/usr/lib/python3.5/email/generator.py", line 115, in flatten
self._write(msg)
File "/usr/lib/python3.5/email/generator.py", line 181, in _write
self._dispatch(msg)
File "/usr/lib/python3.5/email/generator.py", line 214, in _dispatch
meth(msg)
File "/usr/lib/python3.5/email/generator.py", line 243, in _handle_text
msg.set_payload(payload, charset)
File "/usr/lib/python3.5/email/message.py", line 316, in set_payload
payload = payload.encode(charset.output_charset)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 31-33:
ordinal not in range(128)
----------
components: email
files: bad_email_2.eml
messages: 308353
nosy: barry, msapiro, r.david.murray
priority: normal
severity: normal
status: open
title: Email parser creates a message object that can't be flattened
type: behavior
versions: Python 3.5, Python 3.6
Added file: https://bugs.python.org/file47333/bad_email_2.eml
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<https://bugs.python.org/issue32330>
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