#11584: Since __getitem__ returns headers, make decode_header handle them.
Why I consider this a bug rather than an API change: the API change was
to Message, which didn't used to return Headers unless you added them
yourself. Now it does (for 8bit binary header input), so decode_header
needs to be able to handle them.
diff --git a/Lib/email/header.py b/Lib/email/header.py
index 8c32514..2562b30 100644
--- a/Lib/email/header.py
+++ b/Lib/email/header.py
@@ -66,9 +66,15 @@
otherwise a lower-case string containing the name of the character set
specified in the encoded string.
+ header may be a string that may or may not contain RFC2047 encoded words,
+ or it may be a Header object.
+
An email.errors.HeaderParseError may be raised when certain decoding error
occurs (e.g. a base64 decoding exception).
"""
+ # If it is a Header object, we can just return the chunks.
+ if hasattr(header, '_chunks'):
+ return list(header._chunks)
# If no encoding, just return the header with no charset.
if not ecre.search(header):
return [(header, None)]
diff --git a/Lib/email/test/test_email.py b/Lib/email/test/test_email.py
index 250a644..245f659 100644
--- a/Lib/email/test/test_email.py
+++ b/Lib/email/test/test_email.py
@@ -3918,6 +3918,20 @@
h.append(x, errors='replace')
eq(str(h), e)
+ def test_escaped_8bit_header(self):
+ x = b'Ynwp4dUEbay Auction Semiar- No Charge \x96 Earn Big'
+ x = x.decode('ascii', 'surrogateescape')
+ h = Header(x, charset=email.charset.UNKNOWN8BIT)
+ self.assertEqual(str(h),
+ 'Ynwp4dUEbay Auction Semiar- No Charge \uFFFD Earn Big')
+ self.assertEqual(email.header.decode_header(h), [(x, 'unknown-8bit')])
+
+ def test_modify_returned_list_does_not_change_header(self):
+ h = Header('test')
+ chunks = email.header.decode_header(h)
+ chunks.append(('ascii', 'test2'))
+ self.assertEqual(str(h), 'test')
+
def test_encoded_adjacent_nonencoded(self):
eq = self.assertEqual
h = Header()