From 27a0b3ecbdcf248b331742c7b2771d2a87dc8c3a Mon Sep 17 00:00:00 2001
From: teravus
Date: Sun, 3 Feb 2013 06:49:17 -0500
Subject: Commit 1 in of this branch feature.  This is one of many...

---
 .../TCPJSONStream/TCPJsonWebSocketServer.cs        | 163 +++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs

(limited to 'OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs')

diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs b/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs
new file mode 100644
index 0000000..0713bf4
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs
@@ -0,0 +1,163 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Scenes;
+using log4net;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    public delegate void ExceptionHandler(object source, Exception exception);
+
+    public class TCPJsonWebSocketServer
+    {
+        private readonly IPAddress _address;
+        private readonly int _port;
+        private readonly ManualResetEvent _shutdownEvent = new ManualResetEvent(false);
+        private TcpListener _listener;
+        private int _pendingAccepts;
+        private bool _shutdown;
+        private int _backlogAcceptQueueLength = 5;
+        private Scene m_scene;
+        private Location m_location;
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public event EventHandler<ClientAcceptedEventArgs> Accepted = delegate { };
+
+
+        public TCPJsonWebSocketServer(IPAddress _listenIP, ref uint port, int proxyPortOffsetParm,
+                                      bool allow_alternate_port, IConfigSource configSource,
+                                      AgentCircuitManager authenticateClass)
+        {
+            _address = _listenIP;
+            _port = (int)port;  //Why is a uint passed in?
+        }
+        public void Stop()
+        {
+            _shutdown = true;
+            _listener.Stop();
+            if (!_shutdownEvent.WaitOne())
+                m_log.Error("[WEBSOCKETSERVER]: Failed to shutdown listener properly.");
+            _listener = null;
+        }
+
+        public bool HandlesRegion(Location x)
+        {
+            return x == m_location;
+        }
+
+        public void AddScene(IScene scene)
+        {
+            if (m_scene != null)
+            {
+                m_log.Debug("[WEBSOCKETSERVER]: AddScene() called but I already have a scene.");
+                return;
+            }
+            if (!(scene is Scene))
+            {
+                m_log.Error("[WEBSOCKETSERVER]: AddScene() called with an unrecognized scene type " + scene.GetType());
+                return;
+            }
+
+            m_scene = (Scene)scene;
+            m_location = new Location(m_scene.RegionInfo.RegionHandle);
+        }
+
+        public void Start()
+        {
+            _listener = new TcpListener(_address, _port);
+            _listener.Start(_backlogAcceptQueueLength);
+            Interlocked.Increment(ref _pendingAccepts);
+            _listener.BeginAcceptSocket(OnAccept, null);
+        }
+
+        private void OnAccept(IAsyncResult ar)
+        {
+            bool beginAcceptCalled = false;
+            try
+            {
+                int count = Interlocked.Decrement(ref _pendingAccepts);
+                if (_shutdown)
+                {
+                    if (count == 0)
+                        _shutdownEvent.Set();
+                    return;
+                }
+                Interlocked.Increment(ref _pendingAccepts);
+                _listener.BeginAcceptSocket(OnAccept, null);
+                beginAcceptCalled = true;
+                Socket socket = _listener.EndAcceptSocket(ar);
+                if (!OnAcceptingSocket(socket))
+                {
+                    socket.Disconnect(true);
+                    return;
+                }
+                ClientNetworkContext context = new ClientNetworkContext((IPEndPoint) socket.RemoteEndPoint, _port,
+                                                                        new NetworkStream(socket), 16384, socket);
+                HttpRequestParser parser;
+                context.BeginRead();
+
+            }
+            catch (Exception err)
+            {
+                if (ExceptionThrown == null)
+#if DEBUG
+                    throw;
+#else
+                   _logWriter.Write(this, LogPrio.Fatal, err.Message);
+                // we can't really do anything but close the connection
+#endif
+                if (ExceptionThrown != null)
+                    ExceptionThrown(this, err);
+
+                if (!beginAcceptCalled)
+                    RetryBeginAccept();
+
+            }
+        }
+
+        private void RetryBeginAccept()
+        {
+            try
+            {
+                
+                _listener.BeginAcceptSocket(OnAccept, null);
+            }
+            catch (Exception err)
+            {
+                
+                if (ExceptionThrown == null)
+#if DEBUG
+                    throw;
+#else
+                // we can't really do anything but close the connection
+#endif
+                if (ExceptionThrown != null)
+                    ExceptionThrown(this, err);
+            }
+        }
+
+        private bool OnAcceptingSocket(Socket sock)
+        {
+            ClientAcceptedEventArgs args = new ClientAcceptedEventArgs(sock);
+            Accepted(this, args);
+            return !args.Revoked;
+        }
+        /// <summary>
+        /// Catch exceptions not handled by the listener.
+        /// </summary>
+        /// <remarks>
+        /// Exceptions will be thrown during debug mode if this event is not used,
+        /// exceptions will be printed to console and suppressed during release mode.
+        /// </remarks>
+        public event ExceptionHandler ExceptionThrown = delegate { };
+
+        
+
+    }
+}
-- 
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