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-rw-r--r--Lib/email/encoders.py17
-rw-r--r--Lib/test/test_email/test_email.py9
2 files changed, 12 insertions, 14 deletions
diff --git a/Lib/email/encoders.py b/Lib/email/encoders.py
index f9657f0..0a66acb 100644
--- a/Lib/email/encoders.py
+++ b/Lib/email/encoders.py
@@ -54,21 +54,12 @@ def encode_7or8bit(msg):
# There's no payload. For backwards compatibility we use 7bit
msg['Content-Transfer-Encoding'] = '7bit'
return
- # We play a trick to make this go fast. If encoding/decode to ASCII
- # succeeds, we know the data must be 7bit, otherwise treat it as 8bit.
+ # We play a trick to make this go fast. If decoding from ASCII succeeds,
+ # we know the data must be 7bit, otherwise treat it as 8bit.
try:
- if isinstance(orig, str):
- orig.encode('ascii')
- else:
- orig.decode('ascii')
+ orig.decode('ascii')
except UnicodeError:
- charset = msg.get_charset()
- output_cset = charset and charset.output_charset
- # iso-2022-* is non-ASCII but encodes to a 7-bit representation
- if output_cset and output_cset.lower().startswith('iso-2022-'):
- msg['Content-Transfer-Encoding'] = '7bit'
- else:
- msg['Content-Transfer-Encoding'] = '8bit'
+ msg['Content-Transfer-Encoding'] = '8bit'
else:
msg['Content-Transfer-Encoding'] = '7bit'
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index 51a9438..ded3562 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -765,8 +765,15 @@ class TestEncoders(unittest.TestCase):
# whose output character set is 7bit gets a transfer-encoding
# of 7bit.
eq = self.assertEqual
- msg = MIMEText('文', _charset='euc-jp')
+ msg = MIMEText('文\n', _charset='euc-jp')
eq(msg['content-transfer-encoding'], '7bit')
+ eq(msg.as_string(), textwrap.dedent("""\
+ MIME-Version: 1.0
+ Content-Type: text/plain; charset="iso-2022-jp"
+ Content-Transfer-Encoding: 7bit
+
+ \x1b$BJ8\x1b(B
+ """))
def test_qp_encode_latin1(self):
msg = MIMEText('\xe1\xf6\n', 'text', 'ISO-8859-1')