public async Task Invoke(HttpContext context, ICustomWebSocketFactory wsFactory, ICustomWebSocketMessageHandler wsmHandler)
        {
            if (context.Request.Path == "/ws")
            {
                if (context.Request.Headers.ContainsKey("Sec-WebSocket-Protocol"))
                {
                    context.Response.Headers.Add("Sec-WebSocket-Protocol", "protocol1");
                }
                if (context.WebSockets.IsWebSocketRequest)
                {
                    string username = context.Request.Query["u"];
                    string token    = context.Request.Query["token"];
                    //Log4netHelper.Info(this, "websokct进入,用户为:" + username);
                    if (!string.IsNullOrEmpty(username) && !string.IsNullOrEmpty(token) && token.Length == 36)
                    {
                        WebSocket webSocket = await context.WebSockets.AcceptWebSocketAsync();

                        CustomWebSocket userWebSocket = new CustomWebSocket()
                        {
                            WebSocket = webSocket,
                            Username  = username,
                            token     = token
                        };
                        wsFactory.Add(userWebSocket);
                        wsFactory.RemoveInvalid();
                        await wsmHandler.SendInitialMessages(userWebSocket);
                        await Listen(context, userWebSocket, wsFactory, wsmHandler);
                    }
                }
                else
                {
                    context.Response.StatusCode = 400;
                    //Log4netHelper.Info(this, "不是websocket请求!");
                }
            }
            else
            {
                await _next(context);
            }
        }