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-rw-r--r--Lib/email/base64mime.py5
1 files changed, 3 insertions, 2 deletions
diff --git a/Lib/email/base64mime.py b/Lib/email/base64mime.py
index c60f8db..6db007d 100644
--- a/Lib/email/base64mime.py
+++ b/Lib/email/base64mime.py
@@ -66,9 +66,10 @@ def header_encode(header_bytes, charset='iso-8859-1'):
charset names the character set to use to encode the header. It defaults
to iso-8859-1. Base64 encoding is defined in RFC 2045.
"""
- # Return empty headers unchanged
if not header_bytes:
- return str(header_bytes)
+ return ""
+ if isinstance(header_bytes, str):
+ header_bytes = header_bytes.encode(charset)
encoded = b64encode(header_bytes).decode("ascii")
return '=?%s?b?%s?=' % (charset, encoded)