State() — netty Function Reference

Source Code

codec-http3/src/main/java/io/netty/handler/codec/http3/Http3RequestStreamEncodeStateValidator.java lines 79–107

    @Nullable
    static State evaluateFrame(State state, Http3RequestStreamFrame frame) {
        if (frame instanceof Http3PushPromiseFrame || frame instanceof Http3UnknownFrame) {
            // always allow push promise frames.
            return state;
        }
        switch (state) {
            case None:
            case Headers:
                if (!(frame instanceof Http3HeadersFrame)) {
                    return null;
                }
                return isInformationalResponse((Http3HeadersFrame) frame) ? State.Headers : State.FinalHeaders;
            case FinalHeaders:
                if (frame instanceof Http3HeadersFrame) {
                    if (isInformationalResponse((Http3HeadersFrame) frame)) {
                        // Information response after final response headers
                        return null;
                    }
                    // trailers
                    return State.Trailers;
                }
                return state;
            case Trailers:
                return null;
            default:
                throw new Error("Unexpected frame state: " + state);
        }
    }