@Override
    public boolean skip(final ServerWebExchange exchange) {
        return skipExcept(exchange, RpcTypeEnum.WEB_SOCKET);
    }
plugin is execute.

@return default false.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-websocket/src/main/java/org/apache/shenyu/plugin/websocket/WebSocketPlugin.java