Method process_origin

src/websockets/server.py:277–310

Handle the Origin HTTP request header. Args: headers: WebSocket handshake request headers. Returns: origin, if it is acceptable. Raises: InvalidHandshake: If the Origin header is invalid. InvalidOrigin: If the origin

(self, headers: Headers)

        return (accept_header, extensions_header, protocol_header)

    def process_origin(self, headers: Headers) -> Origin | None:
        """
        Handle the Origin HTTP request header.

        Args:
            headers: WebSocket handshake request headers.

        Returns:
           origin, if it is acceptable.

        Raises:
            InvalidHandshake: If the Origin header is invalid.
            InvalidOrigin: If the origin isn't acceptable.

        """
        # "The user agent MUST NOT include more than one Origin header field"
        # per https://datatracker.ietf.org/doc/html/rfc6454#section-7.3.
        try:
            origin = headers.get("Origin")
        except MultipleValuesError:
            raise InvalidHeader("Origin", "multiple values") from None
        if origin is not None:
            origin = cast(Origin, origin)
        if self.origins is not None:
            for origin_or_regex in self.origins:
                if origin_or_regex == origin or (
                    isinstance(origin_or_regex, re.Pattern)
                    and origin is not None
                    and origin_or_regex.fullmatch(origin) is not None
                ):
                    break
            else:
                raise InvalidOrigin(origin)
        return origin

    def process_extensions(
        self,