Function unquote_header_value

src/werkzeug/http.py:177–193

Remove double quotes and backslash escapes from a header value. This is the reverse of :func:`quote_header_value`. :param value: The header value to unquote. .. versionchanged:: 3.2 Removes escape preceding any character. .. versionchanged:: 3.0 The ``is_filename`

(value: str)

def unquote_header_value(value: str) -> str:
    """Remove double quotes and backslash escapes from a header value.

    This is the reverse of :func:`quote_header_value`.

    :param value: The header value to unquote.

    .. versionchanged:: 3.2
        Removes escape preceding any character.

    .. versionchanged:: 3.0
        The ``is_filename`` parameter is removed.
    """
    if len(value) >= 2 and value[0] == value[-1] == '"':
        return _unslash_re.sub(r"\g<1>", value[1:-1])

    return value


def dump_options_header(header: str | None, options: t.Mapping[str, t.Any]) -> str: