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65 lines
1.8 KiB
65 lines
1.8 KiB
import os |
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import string |
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import urllib.parse |
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import urllib.request |
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from typing import Optional |
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from .compat import WINDOWS |
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def get_url_scheme(url): |
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# type: (str) -> Optional[str] |
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if ":" not in url: |
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return None |
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return url.split(":", 1)[0].lower() |
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def path_to_url(path): |
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# type: (str) -> str |
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""" |
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Convert a path to a file: URL. The path will be made absolute and have |
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quoted path parts. |
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""" |
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path = os.path.normpath(os.path.abspath(path)) |
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url = urllib.parse.urljoin("file:", urllib.request.pathname2url(path)) |
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return url |
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def url_to_path(url): |
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# type: (str) -> str |
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""" |
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Convert a file: URL to a path. |
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""" |
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assert url.startswith( |
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"file:" |
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), f"You can only turn file: urls into filenames (not {url!r})" |
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_, netloc, path, _, _ = urllib.parse.urlsplit(url) |
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if not netloc or netloc == "localhost": |
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# According to RFC 8089, same as empty authority. |
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netloc = "" |
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elif WINDOWS: |
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# If we have a UNC path, prepend UNC share notation. |
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netloc = "\\\\" + netloc |
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else: |
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raise ValueError( |
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f"non-local file URIs are not supported on this platform: {url!r}" |
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) |
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path = urllib.request.url2pathname(netloc + path) |
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# On Windows, urlsplit parses the path as something like "/C:/Users/foo". |
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# This creates issues for path-related functions like io.open(), so we try |
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# to detect and strip the leading slash. |
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if ( |
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WINDOWS |
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and not netloc # Not UNC. |
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and len(path) >= 3 |
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and path[0] == "/" # Leading slash to strip. |
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and path[1] in string.ascii_letters # Drive letter. |
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and path[2:4] in (":", ":/") # Colon + end of string, or colon + absolute path. |
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): |
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path = path[1:] |
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return path
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