asp.net WEBSocket简单例子 推送数据

 public class SocketHandler
    {
        public const int BufferSize = 4096; //缓冲区 

        /// 

        /// webSocket 承载
        /// 
        public WebSocket socket;

        /// 

        /// webSocket 转换静态 
        /// 
        private static WebSocket webSocket;

        private static HttpContext context;

        private static byte[] faceJson;                     //

        SocketHandler(WebSocket socket)
        {
            this.socket = socket;
        }

        /// 

        /// 使用websocket发送json
        /// 
        /// json实体
        /// 
        public static async Task Send(FaceCheckinEventArgs body)
        {
            MsgTemplate msgTemplate = new MsgTemplate();
            msgTemplate.Name = body.DeviceName;
            msgTemplate.PicUrl = body.PicUrl;
            msgTemplate.UpTime = body.RecordTime.ToLocalTime().ToString();
            msgTemplate.CarNo = body.CardID;
            
            //序列化
            var json = JsonConvert.SerializeObject(msgTemplate);
            faceJson = Encoding.UTF8.GetBytes(json);

            if (webSocket == null)
                return;

            //放入数组段
            var outgoing = new ArraySegment<byte>(faceJson, 0, faceJson.Length);
            //发送json
            await webSocket.SendAsync(outgoing, WebSocketMessageType.Text, true, CancellationToken.None);         
        }

        /// 

        /// 开启socket
        /// 
        /// 
        /// 
        /// 
        static async Task Acceptor(HttpContext hc, Func<Task> n)
        {
            if (!hc.WebSockets.IsWebSocketRequest)
                return;

            var socket = await hc.WebSockets.AcceptWebSocketAsync();
            webSocket = socket;
            var h = new SocketHandler(socket);
            context = hc;
            var buffer = new byte[BufferSize];
            var seg = new ArraySegment<byte>(buffer);

            
            while(webSocket.State== WebSocketState.Open)                        //保持开启状态
            {
                Thread.Sleep(1000);
            }
        }

        /// 

        /// 为这个SokKethHANDER使用分支请求管道
        /// 
        /// 
        public static void Map(IApplicationBuilder app)
        {
            app.UseWebSockets();
            app.Use(SocketHandler.Acceptor);
        }
    }