onHttpServerUpgrade() — netty Function Reference

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/Http2ConnectionHandler.java lines 170–188

    public void onHttpServerUpgrade(Http2Settings settings) throws Http2Exception {
        if (!connection().isServer()) {
            throw connectionError(PROTOCOL_ERROR, "Server-side HTTP upgrade requested for a client");
        }
        if (!prefaceSent()) {
            // If the preface was not sent yet it most likely means the handler was not added to the pipeline before
            // calling this method.
            throw connectionError(INTERNAL_ERROR, "HTTP upgrade must occur after preface was sent");
        }
        if (decoder.prefaceReceived()) {
            throw connectionError(PROTOCOL_ERROR, "HTTP upgrade must occur before HTTP/2 preface is received");
        }

        // Apply the settings but no ACK is necessary.
        encoder.remoteSettings(settings);

        // Create a stream in the half-closed state.
        connection().remote().createStream(HTTP_UPGRADE_STREAM_ID, true);
    }