self.root_path = root_path or openapi_prefix
        self.state: Annotated[
            State,
            Doc(
                """
                A state object for the application. This is the same object for the
                entire application, it doesn't change from request to request.

                You normally woudln't use this in FastAPI, for most of the cases you
                would instead use FastAPI dependencies.

                                message = email.message.Message()
                                message["content-type"] = content_type_value
                                if message.get_content_maintype() == "application":
                                    subtype = message.get_content_subtype()
                                    if subtype == "json" or subtype.endswith("+json"):