#19063: partially fix set_payload handling of non-ASCII string input.
This is a backward compatible partial fix, the complete fix requires raising
an error instead of accepting the invalid input, so the real fix is only
suitable for 3.4.
diff --git a/Lib/email/charset.py b/Lib/email/charset.py
index 892bab5..e999472 100644
--- a/Lib/email/charset.py
+++ b/Lib/email/charset.py
@@ -386,7 +386,8 @@
string using the ascii codec produces the correct string version
of the content.
"""
- # 7bit/8bit encodings return the string unchanged (module conversions)
+ if not string:
+ return string
if self.body_encoding is BASE64:
if isinstance(string, str):
string = string.encode(self.output_charset)
@@ -398,13 +399,9 @@
# character set, then, we must turn it into pseudo bytes via the
# latin1 charset, which will encode any byte as a single code point
# between 0 and 255, which is what body_encode is expecting.
- #
- # Note that this clause doesn't handle the case of a _payload that
- # is already bytes. It never did, and the semantics of _payload
- # being bytes has never been nailed down, so fixing that is a
- # longer term TODO.
if isinstance(string, str):
- string = string.encode(self.output_charset).decode('latin1')
+ string = string.encode(self.output_charset)
+ string = string.decode('latin1')
return email.quoprimime.body_encode(string)
else:
if isinstance(string, str):
diff --git a/Lib/email/message.py b/Lib/email/message.py
index f43a380..63b51f6 100644
--- a/Lib/email/message.py
+++ b/Lib/email/message.py
@@ -275,9 +275,19 @@
Optional charset sets the message's default character set. See
set_charset() for details.
"""
- if isinstance(payload, bytes):
- payload = payload.decode('ascii', 'surrogateescape')
- self._payload = payload
+ if hasattr(payload, 'encode'):
+ if charset is None:
+ # We should check for ASCII-only here, but we can't do that
+ # for backward compatibility reasons. Fixed in 3.4.
+ self._payload = payload
+ return
+ if not isinstance(charset, Charset):
+ charset = Charset(charset)
+ payload = payload.encode(charset.output_charset)
+ if hasattr(payload, 'decode'):
+ self._payload = payload.decode('ascii', 'surrogateescape')
+ else:
+ self._payload = payload
if charset is not None:
self.set_charset(charset)
@@ -316,7 +326,15 @@
try:
cte(self)
except TypeError:
- self._payload = charset.body_encode(self._payload)
+ # This if is for backward compatibility and will be removed
+ # in 3.4 when the ascii check is added to set_payload.
+ payload = self._payload
+ if payload:
+ try:
+ payload = payload.encode('ascii', 'surrogateescape')
+ except UnicodeError:
+ payload = payload.encode(charset.output_charset)
+ self._payload = charset.body_encode(payload)
self.add_header('Content-Transfer-Encoding', cte)
def get_charset(self):