Class MethodNotAllowed

src/werkzeug/exceptions.py:364–397

*405* `Method Not Allowed` Raise if the server used a method the resource does not handle. For example `POST` if the resource is view only. Especially useful for REST. The first argument for this exception should be a list of allowed methods. Strictly speaking the response would

class MethodNotAllowed(HTTPException):
    """*405* `Method Not Allowed`

    Raise if the server used a method the resource does not handle.  For
    example `POST` if the resource is view only.  Especially useful for REST.

    The first argument for this exception should be a list of allowed methods.
    Strictly speaking the response would be invalid if you don't provide valid
    methods in the header which you can do with that list.
    """

    code = 405
    description = "The method is not allowed for the requested URL."

    def __init__(
        self,
        valid_methods: t.Iterable[str] | None = None,
        description: str | None = None,
        response: SansIOResponse | None = None,
    ) -> None:
        """Takes an optional list of valid http methods
        starting with werkzeug 0.3 the list will be mandatory."""
        super().__init__(description=description, response=response)
        self.valid_methods = valid_methods

    def get_headers(
        self,
        environ: WSGIEnvironment | None = None,
        scope: dict[str, t.Any] | None = None,
    ) -> list[tuple[str, str]]:
        headers = super().get_headers(environ, scope)
        if self.valid_methods:
            headers.append(("Allow", ", ".join(self.valid_methods)))
        return headers


class NotAcceptable(HTTPException):