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from __future__ import annotations
from collections import defaultdict
from functools import lru_cache
from http.cookies import _unquote as unquote_cookie
from urllib.parse import unquote
try:
from fast_query_parsers import parse_query_string as parse_qsl
except ImportError:
from urllib.parse import parse_qsl as _parse_qsl
def parse_qsl(qs: bytes, separator: str) -> list[tuple[str, str]]:
return _parse_qsl(qs.decode("latin-1"), keep_blank_values=True, separator=separator)
__all__ = ("parse_cookie_string", "parse_query_string", "parse_url_encoded_form_data")
@lru_cache(1024)
def parse_url_encoded_form_data(encoded_data: bytes) -> dict[str, str | list[str]]:
"""Parse an url encoded form data dict.
Args:
encoded_data: The encoded byte string.
Returns:
A parsed dict.
"""
decoded_dict: defaultdict[str, list[str]] = defaultdict(list)
for k, v in parse_qsl(encoded_data, separator="&"):
decoded_dict[k].append(v)
return {k: v if len(v) > 1 else v[0] for k, v in decoded_dict.items()}
@lru_cache(1024)
def parse_query_string(query_string: bytes) -> tuple[tuple[str, str], ...]:
"""Parse a query string into a tuple of key value pairs.
Args:
query_string: A query string.
Returns:
A tuple of key value pairs.
"""
return tuple(parse_qsl(query_string, separator="&"))
@lru_cache(1024)
def parse_cookie_string(cookie_string: str) -> dict[str, str]:
"""Parse a cookie string into a dictionary of values.
Args:
cookie_string: A cookie string.
Returns:
A string keyed dictionary of values
"""
cookies = [cookie.split("=", 1) if "=" in cookie else ("", cookie) for cookie in cookie_string.split(";")]
output: dict[str, str] = {
k: unquote(unquote_cookie(v))
for k, v in filter(
lambda x: x[0] or x[1],
((k.strip(), v.strip()) for k, v in cookies),
)
}
return output
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