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"""Convert a NT pathname to a file URL and vice versa.
This module only exists to provide OS-specific code
for urllib.requests, thus do not use directly.
"""
# Testing is done through test_urllib.
def url2pathname(url):
"""OS-specific conversion from a relative URL of the 'file' scheme
to a file system path; not recommended for general use."""
# e.g.
# ///C|/foo/bar/spam.foo
# and
# ///C:/foo/bar/spam.foo
# become
# C:\foo\bar\spam.foo
import string, urllib.parse
# Windows itself uses ":" even in URLs.
url = url.replace(':', '|')
if not '|' in url:
# No drive specifier, just convert slashes
if url[:3] == '///':
# URL has an empty authority section, so the path begins on the
# third character.
url = url[2:]
# make sure not to convert quoted slashes :-)
return urllib.parse.unquote(url.replace('/', '\\'))
comp = url.split('|')
if len(comp) != 2 or comp[0][-1] not in string.ascii_letters:
error = 'Bad URL: ' + url
raise OSError(error)
drive = comp[0][-1].upper()
tail = urllib.parse.unquote(comp[1].replace('/', '\\'))
return drive + ':' + tail
def pathname2url(p):
"""OS-specific conversion from a file system path to a relative URL
of the 'file' scheme; not recommended for general use."""
# e.g.
# C:\foo\bar\spam.foo
# becomes
# ///C:/foo/bar/spam.foo
import ntpath
import urllib.parse
# First, clean up some special forms. We are going to sacrifice
# the additional information anyway
p = p.replace('\\', '/')
if p[:4] == '//?/':
p = p[4:]
if p[:4].upper() == 'UNC/':
p = '//' + p[4:]
drive, tail = ntpath.splitdrive(p)
if drive[1:] == ':':
# DOS drive specified. Add three slashes to the start, producing
# an authority section with a zero-length authority, and a path
# section starting with a single slash.
drive = f'///{drive.upper()}'
drive = urllib.parse.quote(drive, safe='/:')
tail = urllib.parse.quote(tail)
return drive + tail
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