Fix GzipFile's handling of filenames given as bytes objects.
diff --git a/Lib/gzip.py b/Lib/gzip.py
index 1de23b6..ee45e50 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -159,9 +159,8 @@
if fileobj is None:
fileobj = self.myfileobj = builtins.open(filename, mode or 'rb')
if filename is None:
- if hasattr(fileobj, 'name') and isinstance(fileobj.name, str):
- filename = fileobj.name
- else:
+ filename = getattr(fileobj, 'name', '')
+ if not isinstance(filename, (str, bytes)):
filename = ''
if mode is None:
if hasattr(fileobj, 'mode'): mode = fileobj.mode
@@ -236,7 +235,8 @@
# RFC 1952 requires the FNAME field to be Latin-1. Do not
# include filenames that cannot be represented that way.
fname = os.path.basename(self.name)
- fname = fname.encode('latin-1')
+ if not isinstance(fname, bytes):
+ fname = fname.encode('latin-1')
if fname.endswith(b'.gz'):
fname = fname[:-3]
except UnicodeEncodeError: