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50 lines
1.2 KiB
Python

import os
import sys
import urllib.parse
import urllib.request
from typing import Optional
def get_url_scheme(url):
# type: (str) -> Optional[str]
if ":" not in url:
return None
return url.split(":", 1)[0].lower()
def path_to_url(path):
# type: (str) -> str
"""
Convert a path to a file: URL. The path will be made absolute and have
quoted path parts.
"""
path = os.path.normpath(os.path.abspath(path))
url = urllib.parse.urljoin("file:", urllib.request.pathname2url(path))
return url
def url_to_path(url):
# type: (str) -> str
"""
Convert a file: URL to a path.
"""
assert url.startswith(
"file:"
), f"You can only turn file: urls into filenames (not {url!r})"
_, netloc, path, _, _ = urllib.parse.urlsplit(url)
if not netloc or netloc == "localhost":
# According to RFC 8089, same as empty authority.
netloc = ""
elif sys.platform == "win32":
# If we have a UNC path, prepend UNC share notation.
netloc = "\\\\" + netloc
else:
raise ValueError(
f"non-local file URIs are not supported on this platform: {url!r}"
)
path = urllib.request.url2pathname(netloc + path)
return path