件名が Unicode のメッセージを受信すると、次のエラーが表示されます。
'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128)
Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/_webapp25.py", line 716, in __call__
handler.post(*groups)
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/mail_handlers.py", line 69, in post
self.receive(mail.InboundEmailMessage(self.request.body))
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 742, in __init__
self.update_from_mime_message(mime_message)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 1304, in update_from_mime_message
super(InboundEmailMessage, self).update_from_mime_message(mime_message)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 1213, in update_from_mime_message
super(EmailMessage, self).update_from_mime_message(mime_message)
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 1093, in update_from_mime_message
subject = _decode_and_join_header(mime_message['subject'], separator=u'')
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 558, in _decode_and_join_header
for s, c in email.header.decode_header(header))
File "/base/python_runtime/python_lib/versions/1/google/appengine/api/mail.py", line 558, in <genexpr>
for s, c in email.header.decode_header(header))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xd0 in position 0: ordinal not in range(128)
開発環境でも同じ問題が発生します。それを修正する方法はありますか?
電子メール ヘッダーに次のように表示されます。
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit