INNER CODE UNIT · Python

_split_content_type

redis/fastapi-redis-sdk · src/redis_fastapi/cache.py:304

def _split_content_type(raw: bytes | None) -> tuple[str, str | None]:
    """Split a ``Content-Type`` value into its media type and charset.

    Both are lowercased.  A missing header yields ``("", None)``, which no
    allowlist entry matches, so an untyped response is refused rather than
    guessed at.

    Args:
        raw: Raw ``Content-Type`` header value, or ``None``.

    Returns:
        A ``(media_type, charset)`` pair; *charset* is ``None`` when the
        header declares none.
    """
    if raw is None:
        return "", None
    media_type, _, params = raw.decode(HEADER_ENCODING).partition(";")
    charset: str | None = None

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