bpo-32323: urllib.parse.urlsplit() must not lowercase() IPv6 scope value (#4867)
diff --git a/Lib/urllib/parse.py b/Lib/urllib/parse.py
index 76086e5..58460f9 100644
--- a/Lib/urllib/parse.py
+++ b/Lib/urllib/parse.py
@@ -155,10 +155,12 @@
def hostname(self):
hostname = self._hostinfo[0]
if not hostname:
- hostname = None
- elif hostname is not None:
- hostname = hostname.lower()
- return hostname
+ return None
+ # Scoped IPv6 address may have zone info, which must not be lowercased
+ # like http://[fe80::822a:a8ff:fe49:470c%tESt]:1234/keys
+ separator = '%' if isinstance(hostname, str) else b'%'
+ hostname, percent, zone = hostname.partition(separator)
+ return hostname.lower() + percent + zone
@property
def port(self):