Fix for issue #9 - 2

Example2/Chat.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 using WebSocketSharp;
 using WebSocketSharp.Server;
 
@@ -6,8 +7,7 @@ namespace Example2 {
 
   public class Chat : WebSocketService
   {
-    private static object _forNum = new object();
-    private static uint   _num    = 0;
+    private static int _num = 0;
 
     private string _name;
 
@@ -18,12 +18,9 @@ namespace Example2 {
              : "anon#" + getNum();
     }
 
-    private uint getNum()
+    private int getNum()
     {
-      lock (_forNum)
-      {
-        return ++_num;
-      }
+      return Interlocked.Increment(ref _num);
     }
 
     protected override void OnOpen(object sender, EventArgs e)

Example2/Program.cs

@@ -20,6 +20,7 @@ namespace Example2
       //var wssv = new WebSocketServiceHost<Chat>(4649);
       //var wssv = new WebSocketServiceHost<Chat>(4649, "/Chat");
       //var wssv = new WebSocketServiceHost<Chat>(4649, "/チャット");
+      //wssv.Sweeped = false; // Stop the Sweep inactive session Timer.
 
       wssv.Start();
       Console.WriteLine(
@@ -27,12 +28,13 @@ namespace Example2
         wssv.Uri, wssv.Address, wssv.Port);
        */
 
-      // Multi services server
+      /// Multi services server
       var wssv = new WebSocketServer(4649);
       wssv.AddService<Echo>("/Echo");
       wssv.AddService<Echo>("/エコー");
       wssv.AddService<Chat>("/Chat");
       wssv.AddService<Chat>("/チャット");
+      //wssv.Sweeped = false; // Must be set after any AddService methods done.
 
       wssv.Start();
       Console.WriteLine(

Example3/Chat.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading;
 using WebSocketSharp;
 using WebSocketSharp.Server;
 
@@ -6,8 +7,7 @@ namespace Example3 {
 
   public class Chat : WebSocketService
   {
-    private static object _forNum = new object();
-    private static uint   _num    = 0;
+    private static int _num = 0;
 
     private string _name;
 
@@ -18,12 +18,9 @@ namespace Example3 {
              : "anon#" + getNum();
     }
 
-    private uint getNum()
+    private int getNum()
     {
-      lock (_forNum)
-      {
-        return ++_num;
-      }
+      return Interlocked.Increment(ref _num);
     }
 
     protected override void OnOpen(object sender, EventArgs e)

Example3/Program.cs

@@ -14,6 +14,7 @@ namespace Example3
       _httpsv = new HttpServer(4649);
       _httpsv.AddService<Echo>("/Echo");
       _httpsv.AddService<Chat>("/Chat");
+      //_httpsv.Sweeped = false; // Must be set after any AddService methods done.
 
       _httpsv.OnGet += (sender, e) =>
       {

websocket-sharp.userprefs

@@ -1,11 +1,6 @@
 <Properties>
   <MonoDevelop.Ide.Workspace ActiveConfiguration="Debug_Ubuntu" />
-  <MonoDevelop.Ide.Workbench ActiveDocument="websocket-sharp/WebSocket.cs">
-    <Files>
-      <File FileName="websocket-sharp/WebSocket.cs" Line="810" Column="1" />
-      <File FileName="websocket-sharp/Ext.cs" Line="390" Column="19" />
-    </Files>
-  </MonoDevelop.Ide.Workbench>
+  <MonoDevelop.Ide.Workbench />
   <MonoDevelop.Ide.DebuggingService.Breakpoints>
     <BreakpointStore />
   </MonoDevelop.Ide.DebuggingService.Breakpoints>

websocket-sharp/Server/HttpServer.cs

@@ -63,12 +63,22 @@ namespace WebSocketSharp.Server {
 
     #endregion
 
-    #region Property
+    #region Properties
 
     public int Port {
       get { return _port; }
     }
 
+    public bool Sweeped {
+      get {
+        return _services.Sweeped;
+      }
+
+      set {
+        _services.Sweeped = value;
+      }
+    }
+
     #endregion
 
     #region Events

websocket-sharp/Server/IServiceHost.cs

@@ -32,6 +32,7 @@ namespace WebSocketSharp.Server {
 
   public interface IServiceHost {
 
+    bool Sweeped { get; set; }
     void BindWebSocket(WebSocket socket);
     void Broadcast(string data);
     void Start();

websocket-sharp/Server/ServiceManager.cs

@@ -36,6 +36,7 @@ namespace WebSocketSharp.Server {
     #region Field
 
     private Dictionary<string, IServiceHost> _services;
+    private bool                             _sweeped;
 
     #endregion
 
@@ -44,11 +45,12 @@ namespace WebSocketSharp.Server {
     public ServiceManager()
     {
       _services = new Dictionary<string, IServiceHost>();
+      _sweeped  = true;
     }
 
     #endregion
 
-    #region Property
+    #region Properties
 
     public int Count {
       get {
@@ -56,6 +58,21 @@ namespace WebSocketSharp.Server {
       }
     } 
 
+    public bool Sweeped {
+      get {
+        return _sweeped;
+      }
+
+      set {
+        if (value ^ _sweeped)
+        {
+          _sweeped = value;
+          foreach (var svcHost in _services.Values)
+            svcHost.Sweeped = value;
+        }
+      }
+    }
+
     #endregion
 
     #region Public Methods

websocket-sharp/Server/SessionManager.cs

@@ -28,6 +28,8 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
+using System.Timers;
 using WebSocketSharp.Frame;
 
 namespace WebSocketSharp.Server {
@@ -36,8 +38,11 @@ namespace WebSocketSharp.Server {
 
     #region Private Fields
 
-    private bool                                 _isStopped;
+    private object                               _forSweep;
+    private volatile bool                        _isStopped;
+    private volatile bool                        _isSweeping;
     private Dictionary<string, WebSocketService> _sessions;
+    private Timer                                _sweepTimer;
     private object                               _syncRoot;
 
     #endregion
@@ -46,15 +51,32 @@ namespace WebSocketSharp.Server {
 
     public SessionManager()
     {
-      _isStopped = false;
-      _sessions  = new Dictionary<string, WebSocketService>();
-      _syncRoot  = new object();
+      _forSweep   = new object();
+      _isStopped  = false;
+      _isSweeping = false;
+      _sessions   = new Dictionary<string, WebSocketService>();
+      _sweepTimer = new Timer(30 * 1000);
+      _sweepTimer.Elapsed += (sender, e) =>
+      {
+        Sweep();
+      };
+      _syncRoot   = new object();
+
+      startSweepTimer();
     }
 
     #endregion
 
     #region Properties
 
+    public IEnumerable<string> ActiveID {
+      get {
+        return from result in Broadping(String.Empty)
+               where result.Value
+               select result.Key;
+      }
+    }
+
     public int Count {
       get {
         lock (_syncRoot)
@@ -64,6 +86,37 @@ namespace WebSocketSharp.Server {
       }
     } 
 
+    public IEnumerable<string> InactiveID {
+      get {
+        return from result in Broadping(String.Empty)
+               where !result.Value
+               select result.Key;
+      }
+    }
+
+    public IEnumerable<string> ID {
+      get {
+        lock (_syncRoot)
+        {
+          return _sessions.Keys;
+        }
+      }
+    }
+
+    public bool Sweeped {
+      get {
+        return _sweepTimer.Enabled;
+      }
+
+      set {
+        if (value && !_isStopped)
+          startSweepTimer();
+
+        if (!value)
+          stopSweepTimer();
+      }
+    }
+
     public object SyncRoot {
       get {
         return _syncRoot;
@@ -82,11 +135,23 @@ namespace WebSocketSharp.Server {
       }
     }
 
-    private string getNewID()
+    private string createID()
     {
       return Guid.NewGuid().ToString("N");
     }
 
+    private void startSweepTimer()
+    {
+      if (!Sweeped)
+        _sweepTimer.Start();
+    }
+
+    private void stopSweepTimer()
+    {
+      if (Sweeped)
+        _sweepTimer.Stop();
+    }
+
     #endregion
 
     #region Public Methods
@@ -98,7 +163,7 @@ namespace WebSocketSharp.Server {
         if (_isStopped)
           return null;
 
-        var id = getNewID();
+        var id = createID();
         _sessions.Add(id, service);
 
         return id;
@@ -110,7 +175,10 @@ namespace WebSocketSharp.Server {
       lock (_syncRoot)
       {
         foreach (var service in _sessions.Values)
-          service.SendAsync(data);
+          if (_isStopped || _isSweeping)
+            service.Send(data);
+          else
+            service.SendAsync(data);
       }
     }
 
@@ -119,7 +187,10 @@ namespace WebSocketSharp.Server {
       lock (_syncRoot)
       {
         foreach (var service in _sessions.Values)
-          service.SendAsync(data);
+          if (_isStopped || _isSweeping)
+            service.Send(data);
+          else
+            service.SendAsync(data);
       }
     }
 
@@ -132,21 +203,10 @@ namespace WebSocketSharp.Server {
       return result;
     }
 
-    public IEnumerable<string> GetIDs()
-    {
-      lock (_syncRoot)
-      {
-        return _sessions.Keys;
-      }
-    }
-
     public bool Remove(string id)
     {
       lock (_syncRoot)
       {
-        if (_isStopped)
-          return false;
-
         return _sessions.Remove(id);
       }
     }
@@ -166,16 +226,43 @@ namespace WebSocketSharp.Server {
 
     public void Stop(CloseStatusCode code, string reason)
     {
+      stopSweepTimer();
       lock (_syncRoot)
       {
         if (_isStopped)
           return;
 
         _isStopped = true;
-        foreach (var service in _sessions.Values)
+        foreach (var service in copySessions().Values)
           service.Stop(code, reason);
+      }
+    }
 
-        _sessions.Clear();
+    public void Sweep()
+    {
+      if (_isStopped || _isSweeping || Count == 0)
+        return;
+
+      lock (_forSweep)
+      {
+        _isSweeping = true;
+        foreach (var id in InactiveID)
+        {
+          lock (_syncRoot)
+          {
+            if (_isStopped)
+            {
+              _isSweeping = false;
+              return;
+            }
+
+            WebSocketService service;
+            if (TryGetByID(id, out service))
+              service.Stop(CloseStatusCode.ABNORMAL, String.Empty);
+          }
+        }
+
+        _isSweeping = false;
       }
     }
 

websocket-sharp/Server/WebSocketServer.cs

@@ -74,6 +74,20 @@ namespace WebSocketSharp.Server {
 
     #endregion
 
+    #region Property
+
+    public bool Sweeped {
+      get {
+        return _services.Sweeped;
+      }
+
+      set {
+        _services.Sweeped = value;
+      }
+    }
+
+    #endregion
+
     #region Private Method
 
     private void init()

websocket-sharp/Server/WebSocketService.cs

@@ -47,9 +47,8 @@ namespace WebSocketSharp.Server {
 
     public WebSocketService()
     {
-      ID        = String.Empty;
-      IsBound   = false;
-      IsStopped = false;
+      ID      = String.Empty;
+      IsBound = false;
     }
 
     #endregion
@@ -72,9 +71,8 @@ namespace WebSocketSharp.Server {
 
     #region Public Properties
 
-    public string ID        { get; private set; }
-    public bool   IsBound   { get; private set; }
-    public bool   IsStopped { get; private set; }
+    public string ID      { get; private set; }
+    public bool   IsBound { get; private set; }
 
     #endregion
 
@@ -89,8 +87,7 @@ namespace WebSocketSharp.Server {
 
       _socket.OnClose += (sender, e) =>
       {
-        if (!IsStopped)
-          _sessions.Remove(ID);
+        _sessions.Remove(ID);
       };
     }
 
@@ -202,6 +199,7 @@ namespace WebSocketSharp.Server {
       {
         Send(data);
       };
+
       ThreadPool.QueueUserWorkItem(sendCb);
     }
 
@@ -211,6 +209,7 @@ namespace WebSocketSharp.Server {
       {
         Send(data);
       };
+
       ThreadPool.QueueUserWorkItem(sendCb);
     }
 
@@ -242,15 +241,22 @@ namespace WebSocketSharp.Server {
 
     public void Stop()
     {
-      Stop(CloseStatusCode.NORMAL, String.Empty);
+      if (!IsBound)
+        return;
+
+      _socket.Close();
     }
 
     public void Stop(CloseStatusCode code, string reason)
     {
-      if (!IsBound || IsStopped)
+      Stop((ushort)code, reason);
+    }
+
+    public void Stop(ushort code, string reason)
+    {
+      if (!IsBound)
         return;
- 
-      IsStopped = true;
+
       _socket.Close(code, reason);
     }
 

websocket-sharp/Server/WebSocketServiceHost.cs

@@ -79,7 +79,17 @@ namespace WebSocketSharp.Server {
 
     #endregion
 
-    #region Property
+    #region Properties
+
+    public bool Sweeped {
+      get {
+        return _sessions.Sweeped;
+      }
+
+      set {
+        _sessions.Sweeped = value;
+      }
+    }
 
     public Uri Uri {
       get {

websocket-sharp/WebSocket.cs

@@ -418,19 +418,19 @@ namespace WebSocketSharp {
           return;
         }
 
-        // Whether a close status code that must not be set for send is used ?
-        if (!canSendAsCloseFrame(data))
-        {
-          onClose(new CloseEventArgs(data));
-          return;
-        }
-
         _readyState = WsState.CLOSING;
       }
 
+      // Whether a close status code that must not be set for send is used ?
+      if (!canSendAsCloseFrame(data))
+      {
+        onClose(new CloseEventArgs(data));
+        return;
+      }
+
       closeHandshake(data);
       #if DEBUG
-      Console.WriteLine("WS: Info@close: Exit close method.");
+      Console.WriteLine("WS: Info@close: Exits close method.");
       #endif
     }
 
@@ -451,7 +451,7 @@ namespace WebSocketSharp {
       var payloadData = new PayloadData(data.ToArray());
       if (payloadData.Length > 125)
       {
-        var msg = "Close frame must have a payload length of 125 bytes or less.";
+        var msg = "A Close frame must have a payload length of 125 bytes or less.";
         onError(msg);
         return;
       }
@@ -497,10 +497,7 @@ namespace WebSocketSharp {
     {
       var args  = new CloseEventArgs(data);
       var frame = createFrame(Fin.FINAL, Opcode.CLOSE, data);
-      if (send(frame) && !Thread.CurrentThread.IsBackground)
-        if (!_exitMessageLoop.IsNull())
-          _exitMessageLoop.WaitOne(5 * 1000);
-
+      send(frame);
       onClose(args);
     }
 
@@ -738,6 +735,10 @@ namespace WebSocketSharp {
 
     private void onClose(CloseEventArgs eventArgs)
     {
+      if (!Thread.CurrentThread.IsBackground)
+        if (!_exitMessageLoop.IsNull())
+          _exitMessageLoop.WaitOne(5 * 1000);
+
       if (closeConnection())
         eventArgs.WasClean = true;
 
@@ -772,7 +773,7 @@ namespace WebSocketSharp {
       var buffer = Encoding.UTF8.GetBytes(message);
       if (buffer.Length > 125)
       {
-        var msg = "Ping frame must have a payload length of 125 bytes or less.";
+        var msg = "A Ping frame must have a payload length of 125 bytes or less.";
         onError(msg);
         return false;
       }
@@ -800,7 +801,7 @@ namespace WebSocketSharp {
       var frame = _wsStream.ReadFrame();
       if (frame.IsNull())
       {
-        var msg = "WebSocket data frame can not be read from network stream.";
+        var msg = "The WebSocket frame can not be read from network stream.";
         close(CloseStatusCode.ABNORMAL, msg);
       }
 
@@ -846,7 +847,7 @@ namespace WebSocketSharp {
       if (frame.Opcode == Opcode.CLOSE)
       {// FINAL & CLOSE
         #if DEBUG
-        Console.WriteLine("WS: Info@receive: Start closing handshake.");
+        Console.WriteLine("WS: Info@receive: Starts closing handshake.");
         #endif
         close(frame.PayloadData);
         return null;
@@ -855,7 +856,7 @@ namespace WebSocketSharp {
       if (frame.Opcode == Opcode.PING)
       {// FINAL & PING
         #if DEBUG
-        Console.WriteLine("WS: Info@receive: Return Pong.");
+        Console.WriteLine("WS: Info@receive: Returns Pong.");
         #endif
         pong(frame.PayloadData);
         return null;
@@ -863,10 +864,14 @@ namespace WebSocketSharp {
 
       if (frame.Opcode == Opcode.PONG)
       {// FINAL & PONG
+        #if DEBUG
+        Console.WriteLine("WS: Info@receive: Receives Pong.");
+        #endif
         _receivePong.Set();
+        return null;
       }
 
-      // FINAL & (TEXT | BINARY | PONG)
+      // FINAL & (TEXT | BINARY)
       return new MessageEventArgs(frame.Opcode, frame.PayloadData);
     }
 
@@ -889,7 +894,7 @@ namespace WebSocketSharp {
           }
 
           #if DEBUG
-          Console.WriteLine("WS: Info@receiveFragmented: Start closing handshake.");
+          Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
           #endif
           close(CloseStatusCode.INCORRECT_DATA, String.Empty);
           return null;
@@ -904,7 +909,7 @@ namespace WebSocketSharp {
         if (frame.Opcode == Opcode.CLOSE)
         {// FINAL & CLOSE
           #if DEBUG
-          Console.WriteLine("WS: Info@receiveFragmented: Start closing handshake.");
+          Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
           #endif
           close(frame.PayloadData);
           return null;
@@ -913,7 +918,7 @@ namespace WebSocketSharp {
         if (frame.Opcode == Opcode.PING)
         {// FINAL & PING
           #if DEBUG
-          Console.WriteLine("WS: Info@receiveFragmented: Return Pong.");
+          Console.WriteLine("WS: Info@receiveFragmented: Returns Pong.");
           #endif
           pong(frame.PayloadData);
           continue;
@@ -921,14 +926,16 @@ namespace WebSocketSharp {
 
         if (frame.Opcode == Opcode.PONG)
         {// FINAL & PONG
+          #if DEBUG
+          Console.WriteLine("WS: Info@receiveFragmented: Receives Pong.");
+          #endif
           _receivePong.Set();
-          OnMessage.Emit(this, new MessageEventArgs(frame.Opcode, frame.PayloadData));
           continue;
         }
 
         // FINAL & (TEXT | BINARY)
         #if DEBUG
-        Console.WriteLine("WS: Info@receiveFragmented: Start closing handshake.");
+        Console.WriteLine("WS: Info@receiveFragmented: Starts closing handshake.");
         #endif
         close(CloseStatusCode.INCORRECT_DATA, String.Empty);
         return null;
@@ -964,7 +971,7 @@ namespace WebSocketSharp {
       if (_readyState == WsState.CONNECTING ||
           _readyState == WsState.CLOSED)
       {
-        var msg = "Connection isn't established or has been closed.";
+        var msg = "The WebSocket connection isn't established or has been closed.";
         onError(msg);
         return false;
       }
@@ -1011,7 +1018,7 @@ namespace WebSocketSharp {
       {
         if (_readyState != WsState.OPEN)
         {
-          var msg = "Connection isn't established or has been closed.";
+          var msg = "The WebSocket connection isn't established or has been closed.";
           onError(msg);
           return;
         }
@@ -1215,7 +1222,7 @@ namespace WebSocketSharp {
     {
       if (_readyState == WsState.OPEN)
       {
-        Console.WriteLine("WS: Info@Connect: Connection has been established already.");
+        Console.WriteLine("WS: Info@Connect: The WebSocket connection has been established already.");
         return;
       }
 
@@ -1278,7 +1285,9 @@ namespace WebSocketSharp {
       if (message.IsNull())
         message = String.Empty;
 
-      return ping(message, 5 * 1000);
+      return _isClient
+             ? ping(message, 5 * 1000)
+             : ping(message, 1 * 1000);
     }
 
     /// <summary>