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-rw-r--r--Lib/email/header.py7
-rw-r--r--Lib/email/test/test_email.py21
-rw-r--r--Lib/test/test_mailbox.py8
3 files changed, 29 insertions, 7 deletions
diff --git a/Lib/email/header.py b/Lib/email/header.py
index 2e687b7..3250d36 100644
--- a/Lib/email/header.py
+++ b/Lib/email/header.py
@@ -283,7 +283,12 @@ class Header:
# character set, otherwise an early error is thrown.
output_charset = charset.output_codec or 'us-ascii'
if output_charset != _charset.UNKNOWN8BIT:
- s.encode(output_charset, errors)
+ try:
+ s.encode(output_charset, errors)
+ except UnicodeEncodeError:
+ if output_charset!='us-ascii':
+ raise
+ charset = UTF8
self._chunks.append((s, charset))
def encode(self, splitchars=';, \t', maxlinelen=None, linesep='\n'):
diff --git a/Lib/email/test/test_email.py b/Lib/email/test/test_email.py
index 102e15b..f43bb38 100644
--- a/Lib/email/test/test_email.py
+++ b/Lib/email/test/test_email.py
@@ -619,6 +619,19 @@ class TestMessageAPI(TestEmailBase):
msg['Dummy'] = 'dummy\nX-Injected-Header: test'
self.assertRaises(errors.HeaderParseError, msg.as_string)
+ def test_unicode_header_defaults_to_utf8_encoding(self):
+ # Issue 14291
+ m = MIMEText('abc\n')
+ m['Subject'] = 'É test'
+ self.assertEqual(str(m),textwrap.dedent("""\
+ Content-Type: text/plain; charset="us-ascii"
+ MIME-Version: 1.0
+ Content-Transfer-Encoding: 7bit
+ Subject: =?utf-8?q?=C3=89_test?=
+
+ abc
+ """))
+
# Test the email.encoders module
class TestEncoders(unittest.TestCase):
@@ -1060,9 +1073,13 @@ Subject: =?iso-8859-1?q?Britische_Regierung_gibt_gr=FCnes_Licht_f=FCr_Offshore-W
'f\xfcr Offshore-Windkraftprojekte '
'<a-very-long-address@example.com>')
msg['Reply-To'] = header_string
- self.assertRaises(UnicodeEncodeError, msg.as_string)
+ eq(msg.as_string(maxheaderlen=78), """\
+Reply-To: =?utf-8?q?Britische_Regierung_gibt_gr=C3=BCnes_Licht_f=C3=BCr_Offs?=
+ =?utf-8?q?hore-Windkraftprojekte_=3Ca-very-long-address=40example=2Ecom=3E?=
+
+""")
msg = Message()
- msg['Reply-To'] = Header(header_string, 'utf-8',
+ msg['Reply-To'] = Header(header_string,
header_name='Reply-To')
eq(msg.as_string(maxheaderlen=78), """\
Reply-To: =?utf-8?q?Britische_Regierung_gibt_gr=C3=BCnes_Licht_f=C3=BCr_Offs?=
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py
index e09aea4..8f76e18 100644
--- a/Lib/test/test_mailbox.py
+++ b/Lib/test/test_mailbox.py
@@ -111,10 +111,10 @@ class TestMailbox(TestBase):
self.assertMailboxEmpty()
def test_add_that_raises_leaves_mailbox_empty(self):
- # XXX This test will start failing when Message learns to handle
- # non-ASCII string headers, and a different internal failure will
- # need to be found or manufactured.
- with self.assertRaises(ValueError):
+ def raiser(*args, **kw):
+ raise Exception("a fake error")
+ support.patch(self, email.generator.BytesGenerator, 'flatten', raiser)
+ with self.assertRaises(Exception):
self._box.add(email.message_from_string("From: Alphöso"))
self.assertEqual(len(self._box), 0)
self._box.close()