Source code for fs.opener.parse

"""Function to parse FS URLs in to their constituent parts.

from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals

import collections
import re
import typing

import six
from six.moves.urllib.parse import parse_qs, unquote

from .errors import ParseError

if typing.TYPE_CHECKING:
    from typing import Optional, Text

_ParseResult = collections.namedtuple(
    "ParseResult", ["protocol", "username", "password", "resource", "params", "path"]

[docs]class ParseResult(_ParseResult): """A named tuple containing fields of a parsed FS URL. Attributes: protocol (str): The protocol part of the url, e.g. ``osfs`` or ``ftp``. username (str, optional): A username, or `None`. password (str, optional): A password, or `None`. resource (str): A *resource*, typically a domain and path, e.g. ````. params (dict): A dictionary of parameters extracted from the query string. path (str, optional): A path within the filesystem, or `None`. """
_RE_FS_URL = re.compile( r""" ^ (.*?) :\/\/ (?: (?:(.*?)@(.*?)) |(.*?) ) (?: !(.*?)$ )*$ """, re.VERBOSE, )
[docs]def parse_fs_url(fs_url): # type: (Text) -> ParseResult """Parse a Filesystem URL and return a `ParseResult`. Arguments: fs_url (str): A filesystem URL. Returns: ~fs.opener.parse.ParseResult: a parse result instance. Raises: ~fs.errors.ParseError: if the FS URL is not valid. """ match = _RE_FS_URL.match(fs_url) if match is None: raise ParseError("{!r} is not a fs2 url".format(fs_url)) fs_name, credentials, url1, url2, path = match.groups() if not credentials: username = None # type: Optional[Text] password = None # type: Optional[Text] url = url2 else: username, _, password = credentials.partition(":") username = unquote(username) password = unquote(password) url = url1 url, has_qs, qs = url.partition("?") resource = unquote(url) if has_qs: _params = parse_qs(qs, keep_blank_values=True) params = {k: unquote(v[0]) for k, v in six.iteritems(_params)} else: params = {} return ParseResult(fs_name, username, password, resource, params, path)