Commit de91276a authored by R David Murray's avatar R David Murray

#11401: handle headers with no value.

parent 6d94bd47
......@@ -304,7 +304,7 @@ class Header:
self._continuation_ws, splitchars)
for string, charset in self._chunks:
lines = string.splitlines()
formatter.feed(lines[0], charset)
formatter.feed(lines[0] if lines else '', charset)
for line in lines[1:]:
formatter.newline()
if charset.header_encoding is not None:
......
......@@ -3296,6 +3296,13 @@ A very long line that must get split to something other than at the
h = Header('文', charset='shift_jis')
self.assertEqual(h.encode(), '=?iso-2022-jp?b?GyRCSjgbKEI=?=')
def test_flatten_header_with_no_value(self):
# Issue 11401 (regression from email 4.x) Note that the space after
# the header doesn't reflect the input, but this is also the way
# email 4.x behaved. At some point it would be nice to fix that.
msg = email.message_from_string("EmptyHeader:")
self.assertEqual(str(msg), "EmptyHeader: \n\n")
# Test RFC 2231 header parameters (en/de)coding
......
......@@ -40,6 +40,9 @@ Core and Builtins
Library
-------
- Issue #11401: fix handling of headers with no value; this fixes a regression
relative to Python2 and the result is now the same as it was in Python2.
- Issue #9298: base64 bodies weren't being folded to line lengths less than 78,
which was a regression relative to Python2. Unlike Python2, the last line
of the folded body now ends with a carriage return.
......
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