App_win_iot_V2.0/IOTContainer/Communication/WebSocketCom.cs

using Fleck;
using IOTContainer.Common;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using WebSocket4Net;

namespace IOTContainer.Communication
{
    public class WebSocketCom
    {
        private static WebSocketCom _socket;
        public static WebSocketCom Socket
        {
            get
            {
                if (_socket == null)
                {
                    _socket = new WebSocketCom();
                }
                return _socket;
            }
        }
        private static List<IWebSocketConnection> _allSockets = new List<IWebSocketConnection>();
        private WebSocketServer _server;
        private WebSocket _listenedSocket;
        public delegate void playIndexDelegate();
        public static event playIndexDelegate playIndexEvent;
        public static void removeDelegate()
        {

            if (playIndexEvent != null)
            {
                System.Delegate[] dels = playIndexEvent.GetInvocationList();
                for (int i = 0; i < dels.Length; i++)
                {
                    playIndexEvent -= dels[i] as playIndexDelegate;
                }
            }
        }
        #region 服务端

        /// <summary>
        /// 开启WebSocket服务
        /// </summary>
        public bool OpenSocketServer(string location)
        {
            try
            {
                _allSockets.Clear();
                Log.MyLog.WriteLogFile($"开启WebSocket服务：{location}消息", "WebSocket");
                _server = new WebSocketServer(location)
                {
                    RestartAfterListenError = true
                };
                _server.Start(socket =>
                {
                    socket.OnOpen = () =>
                    {
                        _allSockets.Add(socket);
                        Log.MyLog.WriteLogFile($"客户端连接：{socket.ConnectionInfo.ClientIpAddress}", "WebSocket");
                    };
                    socket.OnClose = () =>
                    {
                        _allSockets.Remove(socket);
                        Log.MyLog.WriteLogFile($"客户端连接断开：{socket.ConnectionInfo.ClientIpAddress}", "WebSocket");
                    };
                    socket.OnMessage = message =>//接受来自客户端的信息
                    {
                    };
                });
                ComParameters.Parameters.WebSocketIsConnected = true;
                Log.MyLog.WriteLogFile($"开启WebSocket服务完成：{location}消息", "WebSocket");
                return true;
            }
            catch (Exception ex)
            {
                ComParameters.Parameters.WebSocketIsConnected = false;
                Log.MyLog.WriteLogFile($"开启WebSocket服务出错：{location} " + ex.Message, "WebSocketError");
                Task.Run(() =>
                {
                    Retry(location);

                });
                return false;
            }
        }
        /// <summary>
        /// 通知播放当前节目
        /// </summary>
        /// <param name="programmeIndex"></param>
        public void ProgrammePlay(int programmeIndex)
        {
            try
            {
                Log.MyLog.WriteLogFile($"发送消息{programmeIndex}", "WebSocket");
                foreach (var item in _allSockets)
                {
                    
                    item.Send(programmeIndex.ToString());
                }
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile($"发送WebSocket消息出错：" + ex.Message, "WebSocketError");
            }

            //_allSockets.ForEach(s => 
            //{

            //});
        }
        /// <summary>
        /// 停止websocketServer
        /// </summary>
        public void StopWebSocketServer()
        {
            _allSockets.ForEach((s) => s.Close());
            _allSockets.Clear();
            if (null != _server)
            {
                _server.Dispose();
            }
        }
        public void Retry(string location)
        {
            Task.Delay(30000).Wait();
            Log.MyLog.WriteLogFile($"尝试重新连接{location}", "WebSocketError");
            if (!OpenSocketServer(location))
            {
                Retry(location);
            }
        }
        #endregion
        #region 客户端
        private Timer timer;
        public async void ListenWebSocket(string location)
        {
            try
            {
                Log.MyLog.WriteLogFile($"初始化监听Websocket", "WebSocket");
                var token = new CancellationTokenSource();
                _listenedSocket = new WebSocket(location);
                _listenedSocket.Opened += _listenedServer_Opened;
                _listenedSocket.Error += _listenedServer_Error;
                _listenedSocket.Closed += _listenedServer_Closed;
                _listenedSocket.MessageReceived += _listenedServer_MessageReceived;

                _listenedSocket.Open();
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile($"开启监听WebSocket服务出错：{location} " + ex.Message, "WebSocketError");
            }
            await Task.Run(() =>
            {
                RetryListen(location);
            });
            //timer = new Timer(_ => RetryListen(location), null, 0, 35000);
        }

        private void _listenedServer_MessageReceived(object sender, MessageReceivedEventArgs e)
        {
            try
            {
                //发送过来的消息
                string message = e.Message;
                Log.MyLog.WriteLogFile($"接收到Websocket消息：{message}", "WebSocket");
                var success = int.TryParse(message, out int value);
                if (success)
                {
                    ComParameters.Parameters.ProgramIndex = value;
                    //if (null != ComParameters.Parameters.PlayToken)
                    //{
                    //    ComParameters.Parameters.PlayToken.Cancel();
                    //}
                    playIndexEvent?.Invoke();
                }
                else
                {
                    ComParameters.Parameters.ProgramIndex = null;
                    Log.MyLog.WriteLogFile("WebSocket接收的信息不是数字类型：", "WebSocketError");
                }
            }
            catch (Exception ex)
            {

                Log.MyLog.WriteLogFile("WebSocket接收的信息：" + ex.ToString(), "WebSocketError");
            }

            
        }

        private void _listenedServer_Closed(object sender, EventArgs e)
        {
            ComParameters.Parameters.ProgramIndex = null;
            Log.MyLog.WriteLogFile($"监听Websocket关闭", "WebSocket");
            ListenWebSocket($"ws://{ComParameters.Parameters.MainMachineIp}:{ComParameters.Parameters.SocketPort}");
            //Task.Run(() =>
            //{
            //    RetryListen($"ws://{ComParameters.Parameters.MainMachineIp}:{ComParameters.Parameters.SocketPort}");
            //});
        }

        private void _listenedServer_Error(object sender, SuperSocket.ClientEngine.ErrorEventArgs e)
        {
            ComParameters.Parameters.ProgramIndex = null;
            Log.MyLog.WriteLogFile($"监听Websocket出错：{e.Exception.ToString()}", "WebSocketError");
        }

        private void _listenedServer_Opened(object sender, EventArgs e)
        {
            Log.MyLog.WriteLogFile($"初始化监听Websocket成功", "WebSocket");
        }

        public void SendMsg(string msg)
        {
            Task.Run(() =>
            {
                if (_listenedSocket != null && _listenedSocket.State == WebSocketState.Open)
                {
                    _listenedSocket.Send(msg);
                }
            });
        }
        public async void StopListen()
        {
            try
            {
                ComParameters.Parameters.ProgramIndex = null;
                if (_listenedSocket != null)
                {
                    _listenedSocket.Close();
                    _listenedSocket.Dispose();
                    _listenedSocket = null;
                }
            }
            catch (Exception ex)
            {
                Log.MyLog.WriteLogFile($"结束监听Websocket出错：{ex.Message}", "WebSocket");
            }
        }
        public void RetryListen(string location)
        {
            try
            {
                if (_listenedSocket.State != WebSocketState.Open && _listenedSocket.State != WebSocketState.Connecting)
                {
                    Log.MyLog.WriteLogFile($"尝试重新连接{location}", "WebSocket");
                    ComParameters.Parameters.ProgramIndex = null;
                    _listenedSocket.Close();
                    _listenedSocket.Open();
                    Task.Delay(5000).Wait();
                    RetryListen(location);
                }
            }
            catch (Exception ex)
            {
                ComParameters.Parameters.ProgramIndex = null;
                Log.MyLog.WriteLogFile($"尝试重新连接出错：{ex.Message}", "WebSocketError");
            }

        }
        #endregion
    }
}