urllib.request.url2pathname() mishandles a UNC URI variant · Issue #127078 · python/cpython (original) (raw)

Bug report

Bug description:

On Windows, urllib.request.url2pathname() mishandles an uncommon file URI variant encoding a UNC path. Specifically, a URI with five leading slashes should be converted to a UNC path with two leading slashes, but url2pathname() returns a path with three leading slashes. Such URIs are created by software that simply prepends file:/// to a Windows path. See RFC 8089 E.3.2, final example.

from urllib.request import url2pathname url2pathname('/////server/share') '\\\server\share' # expected: '\\server\share'

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• GH-127078: url2pathname(): handle extra slash before UNC drive in URL path #127132
• [3.13] GH-127078: url2pathname(): handle extra slash before UNC drive in URL path (GH-127132) #127135
• [3.12] GH-127078: url2pathname(): handle extra slash before UNC drive in URL path (GH-127132) #127136