GH-85168: Use filesystem encoding when converting to/from `file` URIs (#126852)

Adjust `urllib.request.url2pathname()` and `pathname2url()` to use the
filesystem encoding when quoting and unquoting file URIs, rather than
forcing use of UTF-8.

No changes are needed in the `nturl2path` module because Windows always
uses UTF-8, per PEP 529.

1 files changed, 6 insertions, 2 deletions

diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index 5c061a2..bcfdcc5 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1657,12 +1657,16 @@ else:
             # URL has an empty authority section, so the path begins on the
             # third character.
             pathname = pathname[2:]
-        return unquote(pathname)
+        encoding = sys.getfilesystemencoding()
+        errors = sys.getfilesystemencodeerrors()
+        return unquote(pathname, encoding=encoding, errors=errors)
 
     def pathname2url(pathname):
         """OS-specific conversion from a file system path to a relative URL
         of the 'file' scheme; not recommended for general use."""
-        return quote(pathname)
+        encoding = sys.getfilesystemencoding()
+        errors = sys.getfilesystemencodeerrors()
+        return quote(pathname, encoding=encoding, errors=errors)
 
 
 # Utility functions