Closed
Description
Bug report
Bug description:
In Python 3.12.4, using EmailMessage class with long non-ASCII characters in the subject, the resulting, encoded extra space =?utf-8?q?_?= is generated. The issue doesn't occur with Python 3.12.3 and 3.11.9.
Python 3.12.4
Python 3.12.4 (main, Jun 20 2024, 23:12:11) [GCC 13.2.1 20240309] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from email import message_from_string >>> from email.message import EmailMessage >>> from email.header import decode_header, make_header >>> msg = EmailMessage() >>> msg.set_content(u'Body text.\n', cte='quoted-printable') >>> subject = 'A_very' + ' long' * 23 + ' súmmäry' >>> subject 'A_very long long long long long long long long long long long long long long long long long long long long long long long súmmäry' >>> msg['Subject'] = subject >>> print(msg.as_string()) Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: A_very long long long long long long long long long long long long long long long long long long long long long long long =?utf-8?q?s=C3=BAmm?= =?utf-8?q?_?==?utf-8?q?=C3=A4ry?= Body text. >>> parsed_msg = message_from_string(msg.as_string()) >>> parsed_subject = str(make_header(decode_header(parsed_msg['Subject']))) >>> parsed_subject 'A_very long long long long long long long long long long long long long long long long long long long long long long long súmm äry' >>> subject == parsed_subject False >>>Python 3.12.3
Python 3.12.3 (main, May 23 2024, 00:56:56) [GCC 13.2.1 20240309] on linux Type "help", "copyright", "credits" or "license" for more information. >>> from email import message_from_string >>> from email.message import EmailMessage >>> from email.header import decode_header, make_header >>> msg = EmailMessage() >>> msg.set_content(u'Body text.\n', cte='quoted-printable') >>> subject = 'A_very' + ' long' * 23 + ' súmmäry' >>> subject 'A_very long long long long long long long long long long long long long long long long long long long long long long long súmmäry' >>> msg['Subject'] = subject >>> print(msg.as_string()) Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: A_very long long long long long long long long long long long long long long long long long long long long long long long =?utf-8?q?s=C3=BAmm?= =?utf-8?q?=C3=A4ry?= Body text. >>> parsed_msg = message_from_string(msg.as_string()) >>> parsed_subject = str(make_header(decode_header(parsed_msg['Subject']))) >>> parsed_subject 'A_very long long long long long long long long long long long long long long long long long long long long long long long súmmäry' >>> subject == parsed_subject True >>>CPython versions tested on:
3.12
Operating systems tested on:
No response
Linked PRs
- gh-120930: Remove extra blank occuring in wrapped encoded words in email headers #121747
- [3.13] gh-120930: Remove extra blank occuring in wrapped encoded words in email headers (GH-121747) #121963
- [3.12] gh-120930: Remove extra blank occuring in wrapped encoded words in email headers (GH-121747) #121964