AuthBase (auth.py)

requests.auth ~~~~~~~~~~~~~ This module contains the authentication handlers for Requests.

"""
requests.auth
~~~~~~~~~~~~~

This module contains the authentication handlers for Requests.
"""

from __future__ import annotations

import hashlib
import os
import re
import threading
import time
import warnings
from base64 import b64encode
from typing import TYPE_CHECKING, Any, Final, cast, overload

from ._internal_utils import to_native_string
from .compat import basestring, str, urlparse
from .cookies import extract_cookies_to_jar
from .utils import parse_dict_header

if TYPE_CHECKING:
    from http.cookiejar import CookieJar
    from typing import Any

    from .models import PreparedRequest, Response

CONTENT_TYPE_FORM_URLENCODED: Final = "application/x-www-form-urlencoded"
CONTENT_TYPE_MULTI_PART: Final = "multipart/form-data"


def _basic_auth_str(username: bytes | str, passwo

... (truncated -- full source via MCP)