解决问题: 1. Socket 的异常断开
2. 部署在IIS程序池上的程序回收导致 端口占用,对象资源却已经释放的BUG
SocketHelper 类 inOptionValues .net框架中用于检测连接的客户端 检测时间(默认2小时) 或者自己写个心跳包(客户端和服务端用规定协议)
1 #region 变量
2
3 //服务器监听socket
4 public static Socket listener = null;
5
6 /// <summary>
7 /// 连接列表
8 /// </summary>
9 public static List<Socket> socketList = new List<Socket>();
10
11 public static Thread listenClientThread = null;
12
13 private static byte[] inOptionValues = null;
14
15 #endregion
16
17
18
19 #region 开启监听 (接收数据)
20
21 /// <summary>
22 /// 开启监听
23 /// </summary>
24 public static void StartListening()
25 {
26 uint dummy = 0;
27 inOptionValues = new byte[Marshal.SizeOf(dummy) * 3];
28 BitConverter.GetBytes((uint)1).CopyTo(inOptionValues, 0); //是否启用Keep-Alive
29 BitConverter.GetBytes((uint)30000).CopyTo(inOptionValues, Marshal.SizeOf(dummy)); //检测客户端时间周期
30 BitConverter.GetBytes((uint)2000).CopyTo(inOptionValues, Marshal.SizeOf(dummy) * 2); //失败后连续探测时间
31
32 byte[] bytes = new Byte[1024];
33 //首先是构造一个socket对象
34 IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
35 IPAddress ip = null;
36 foreach (var item in ipHostInfo.AddressList)
37 {
38 if (item.AddressFamily == AddressFamily.InterNetwork)
39 {
40 ip = item;
41 break;
42 }
43 }
44 IPAddress ipAddress = ipHostInfo.AddressList[0];
45 //System.Web.HttpContext.Current.A
46 IPEndPoint localEndPoint = new IPEndPoint(ip, int.Parse(System.Configuration.ConfigurationManager.AppSettings["Port"]));
47 listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
48 try
49 {
50 listener.Bind(localEndPoint);
51 listener.Listen(100);//开始监听
52
53 while (true)
54 {
55 // 接收请求连接，handler接收该连接，之后使用handler处理收发数据的问题
56 Socket handler = listener.Accept();
57 handler.IOControl(IOControlCode.KeepAliveValues, inOptionValues, null);
58
59 IPEndPoint clientipe = (IPEndPoint)handler.RemoteEndPoint;
60 //SetServerLog("*******" + handler.RemoteEndPoint + "已连接服务器,正在监听!********");
61 //SetConnectList(handler.RemoteEndPoint.ToString(), true);
62
63 Thread nowThread = new Thread(new ParameterizedThreadStart(ReceiveClientData));
64 nowThread.IsBackground = true;
65 nowThread.Name = handler.RemoteEndPoint.ToString();
66
67 Socket sk = new Socket();
68
69 //加入socket列表
70 socketList.Add(sk);
71
72 nowThread.Start(handler);
73 }
74 }
75 catch (Exception e)
76 {
77 //释放资源 IIS回收 正常断开的异常
78 if (e.Message != "一个封锁操作被对 WSACancelBlockingCall 的调用中断。")
79 throw e;
80 else
81 throw e;
82 }
83 }
84
85 //public delegate void CallBack();
86
87 // 接受 客户端的信息
88 private static void ReceiveClientData(object client)
89 {
90 Socket nowClient = (Socket)client;
91 while (true)
92 {
93 try
94 {
95 int res = 0;
96 byte[] bytes = new byte[1024];
97 // 不断的接受客户端发来的信息， 当客户端离线后，退出。
98 res = nowClient.Receive(bytes);
99
100 if (res <= 0)
101 {
102 throw new SocketException();
103 }
104
105 string str = Encoding.UTF8.GetString(bytes, 0, res);
106
107 //绑定ID 业务逻辑
108 if (str.IndexOf("****:****") >= 0)
109 {
110 foreach (var item in socketList)
111 {
112 if (item.RemoteEndPoint == nowClient.RemoteEndPoint)
113 {
114 SendMsg(item.RemoteEndPoint,"SET:(1,2,3)");
115 break;
116 }
117 }
118 }
119 }
120 catch (SocketException se)
121 {
122 socketList = (from si in socketList where si.RemoteEndPoint != nowClient.RemoteEndPoint select si).ToList();
123 nowClient.Close();
124 break;
125 }
126 catch (Exception ee)
127 {
128 throw ee;
129 }
130 }
131 }
132
133 #endregion
134
135 #region 发送数据
136
137 /// <summary>
138 /// 发送数据给客户端
139 /// </summary>
140 /// <param name="ep">ip和Port</param>
141 /// <param name="msg">发送的消息</param>
142 public static void SendMsg(EndPoint ep, string msg)
143 {
144 try
145 {
146 foreach (var item in socketList)
147 {
148 if (item.listener.RemoteEndPoint == ep)
149 {
150 byte[] data = Encoding.UTF8.GetBytes(msg);
151 item.listener.Send(data);
152 break;
153 }
154 }
155 }
156 catch (Exception ee)
157 {
158 throw ee;
159 }
160 }
161
162
163 #endregion
Global 里设置 Application_End 函数中 释放资源
1 protected void Application_Start()
2 {
3
4 if (SocketHelper.listenClientThread == null)
5 {
6 SocketHelper.listenClientThread = new Thread(new ThreadStart(SocketHelper.StartListening));
7 SocketHelper.listenClientThread.IsBackground = true;
8 SocketHelper.listenClientThread.Start();
9 }
10
11 AreaRegistration.RegisterAllAreas();
12 RegisterGlobalFilters(GlobalFilters.Filters);
13 RegisterRoutes(RouteTable.Routes);
14 }
15
16 protected void Application_End()
17 {
18 SocketHelper.listener.Close();
19 SocketHelper.listener.Dispose();
20 SocketHelper.listenClientThread = null;
21 }
有细节上稍许不对 欢迎提出问题 谢谢~~
时间： 2024-08-12 14:46:52