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7bbcd32e59
GH-127078: `url2pathname()`: handle extra slash before UNC drive in URL path (GH-127132)
Decode a file URI like `file://///server/share` as a UNC path like
`\\server\share`. This form of file URI is created by software the simply
prepends `file:///` to any absolute Windows path.
(cherry picked from commit 8c98ed846a)
Co-authored-by: Barney Gale <barney.gale@gmail.com>
69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
"""Convert a NT pathname to a file URL and vice versa.
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This module only exists to provide OS-specific code
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for urllib.requests, thus do not use directly.
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"""
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# Testing is done through test_urllib.
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def url2pathname(url):
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"""OS-specific conversion from a relative URL of the 'file' scheme
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to a file system path; not recommended for general use."""
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# e.g.
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# ///C|/foo/bar/spam.foo
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# and
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# ///C:/foo/bar/spam.foo
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# become
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# C:\foo\bar\spam.foo
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import string, urllib.parse
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if url[:3] == '///':
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# URL has an empty authority section, so the path begins on the third
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# character.
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url = url[2:]
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elif url[:12] == '//localhost/':
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# Skip past 'localhost' authority.
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url = url[11:]
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if url[:3] == '///':
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# Skip past extra slash before UNC drive in URL path.
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url = url[1:]
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# Windows itself uses ":" even in URLs.
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url = url.replace(':', '|')
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if not '|' in url:
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# No drive specifier, just convert slashes
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# make sure not to convert quoted slashes :-)
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return urllib.parse.unquote(url.replace('/', '\\'))
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comp = url.split('|')
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if len(comp) != 2 or comp[0][-1] not in string.ascii_letters:
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error = 'Bad URL: ' + url
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raise OSError(error)
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drive = comp[0][-1].upper()
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tail = urllib.parse.unquote(comp[1].replace('/', '\\'))
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return drive + ':' + tail
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def pathname2url(p):
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"""OS-specific conversion from a file system path to a relative URL
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of the 'file' scheme; not recommended for general use."""
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# e.g.
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# C:\foo\bar\spam.foo
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# becomes
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# ///C:/foo/bar/spam.foo
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import urllib.parse
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# First, clean up some special forms. We are going to sacrifice
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# the additional information anyway
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p = p.replace('\\', '/')
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if p[:4] == '//?/':
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p = p[4:]
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if p[:4].upper() == 'UNC/':
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p = '//' + p[4:]
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elif p[1:2] != ':':
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raise OSError('Bad path: ' + p)
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if not ':' in p:
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# No DOS drive specified, just quote the pathname
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return urllib.parse.quote(p)
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comp = p.split(':', maxsplit=2)
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if len(comp) != 2 or len(comp[0]) > 1:
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error = 'Bad path: ' + p
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raise OSError(error)
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drive = urllib.parse.quote(comp[0].upper())
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tail = urllib.parse.quote(comp[1])
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return '///' + drive + ':' + tail
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