"""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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# 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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if url[:4] == '////':

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# path is something like ////host/path/on/remote/host

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# convert this to \\host\path\on\remote\host

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# (notice halving of slashes at the start of the path)

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url = url[2:]

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components = url.split('/')

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# make sure not to convert quoted slashes :-)

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return urllib.parse.unquote('\\'.join(components))

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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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components = comp[1].split('/')

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path = drive + ':'

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for comp in components:

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if comp:

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path = path + '\\' + urllib.parse.unquote(comp)

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# Issue #11474 - handing url such as |c/|

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if path.endswith(':') and url.endswith('/'):

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path += '\\'

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return path

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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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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 drive specifier, just convert slashes and quote the name

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if p[:2] == '\\\\':

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# path is something like \\host\path\on\remote\host

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# convert this to ////host/path/on/remote/host

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# (notice doubling of slashes at the start of the path)

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p = '\\\\' + p

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components = p.split('\\')

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return urllib.parse.quote('/'.join(components))

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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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components = comp[1].split('\\')

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path = '///' + drive + ':'

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for comp in components:

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if comp:

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path = path + '/' + urllib.parse.quote(comp)

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return path

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