add a Drop method to PollService Event handlers, Drop requests on connections known to be lost or delay event check if they are sending a response

OpenSim/Framework/Console/RemoteConsole.cs

@@ -234,7 +234,7 @@ namespace OpenSim.Framework.Console
             string uri = "/ReadResponses/" + sessionID.ToString() + "/";
 
             m_Server.AddPollServiceHTTPHandler(
-                uri, new PollServiceEventArgs(null, uri, HasEvents, GetEvents, NoEvents, sessionID,25000)); // 25 secs timeout
+                uri, new PollServiceEventArgs(null, uri, HasEvents, GetEvents, NoEvents, Drop, sessionID, 25000)); // 25 secs timeout
 
             XmlDocument xmldoc = new XmlDocument();
             XmlNode xmlnode = xmldoc.CreateNode(XmlNodeType.XmlDeclaration,
@@ -425,6 +425,15 @@ namespace OpenSim.Framework.Console
             return false;
         }
 
+        private void Drop(UUID RequestID, UUID sessionID)
+        {
+            lock (m_Connections)
+            {
+                if (m_Connections.ContainsKey(sessionID))
+                    m_Connections.Remove(sessionID);
+            }
+        }
+
         private Hashtable GetEvents(UUID RequestID, UUID sessionID)
         {
             ConsoleConnection c = null;

OpenSim/Framework/Servers/HttpServer/PollServiceEventArgs.cs

@@ -37,6 +37,7 @@ namespace OpenSim.Framework.Servers.HttpServer
     public delegate Hashtable GetEventsMethod(UUID requestID, UUID pId);
 
     public delegate Hashtable NoEventsMethod(UUID requestID, UUID pId);
+    public delegate void DropMethod(UUID requestID, UUID pId);
 
     public class PollServiceEventArgs : EventArgs
     {
@@ -44,6 +45,7 @@ namespace OpenSim.Framework.Servers.HttpServer
         public GetEventsMethod GetEvents;
         public NoEventsMethod NoEvents;
         public RequestMethod Request;
+        public DropMethod Drop;
         public UUID Id;
         public int TimeOutms;
         public EventType Type;    
@@ -73,13 +75,14 @@ namespace OpenSim.Framework.Servers.HttpServer
             RequestMethod pRequest,
             string pUrl,
             HasEventsMethod pHasEvents, GetEventsMethod pGetEvents, NoEventsMethod pNoEvents,
-            UUID pId, int pTimeOutms)
+            DropMethod pDrop, UUID pId, int pTimeOutms)
         {
             Request = pRequest;
             Url = pUrl;
             HasEvents = pHasEvents;
             GetEvents = pGetEvents;
             NoEvents = pNoEvents;
+            Drop = pDrop;
             Id = pId;
             TimeOutms = pTimeOutms;
             Type = EventType.LongPoll;

OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs

@@ -160,6 +160,19 @@ namespace OpenSim.Framework.Servers.HttpServer
             }
         }
 
+        public void DropByContext(PollServiceHttpRequest req)
+        {
+            Queue<PollServiceHttpRequest> ctxQeueue;
+            lock (m_bycontext)
+            {
+                if (m_bycontext.TryGetValue(req, out ctxQeueue))
+                {
+                    ctxQeueue.Clear();
+                    m_bycontext.Remove(req);
+                }
+            }
+        }
+
         public void EnqueueInt(PollServiceHttpRequest req)
         {
             if (m_running)
@@ -263,22 +276,61 @@ namespace OpenSim.Framework.Servers.HttpServer
                 PollServiceHttpRequest req = m_requests.Dequeue(5000);
 
                 Watchdog.UpdateThread();
-                if (req != null)
+                if(req == null)
-                {
+                    continue;
-                    try
-                    {
-                        if (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id))
-                        {
-                            Hashtable responsedata = req.PollServiceArgs.GetEvents(req.RequestID, req.PollServiceArgs.Id);
 
+                try
+                {
+                    if(!req.HttpContext.CanSend())
+                    {
+                        req.PollServiceArgs.Drop(req.RequestID, req.PollServiceArgs.Id);
+                        byContextDequeue(req);
+                        continue;
+                    }
+
+                    if(req.HttpContext.IsSending())
+                    {
+                        if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms)
+                        {
+                            req.PollServiceArgs.Drop(req.RequestID, req.PollServiceArgs.Id);
+                            byContextDequeue(req);
+                        }
+                        else
+                          ReQueueEvent(req);
+                        continue;
+                    }
+
+                    if (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id))
+                    {
+                        Hashtable responsedata = req.PollServiceArgs.GetEvents(req.RequestID, req.PollServiceArgs.Id);
+
+                        m_threadPool.QueueWorkItem(x =>
+                        {
+                            try
+                            {
+                                req.DoHTTPGruntWork(m_server, responsedata);
+                                byContextDequeue(req);
+                            }
+                            catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream
+                            {
+                                // Ignore it, no need to reply
+                            }
+                            return null;
+                        }, null);
+                    }
+                    else
+                    {
+                        if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms)
+                        {
                             m_threadPool.QueueWorkItem(x =>
                             {
                                 try
                                 {
-                                    req.DoHTTPGruntWork(m_server, responsedata);
+                                    req.DoHTTPGruntWork(m_server,
+                                            req.PollServiceArgs.NoEvents(req.RequestID, req.PollServiceArgs.Id));
                                     byContextDequeue(req);
                                 }
-                                catch (ObjectDisposedException) // Browser aborted before we could read body, server closed the stream
+                                catch (ObjectDisposedException)
                                 {
                                     // Ignore it, no need to reply
                                 }
@@ -287,36 +339,15 @@ namespace OpenSim.Framework.Servers.HttpServer
                         }
                         else
                         {
-                            if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms)
+                            ReQueueEvent(req);
-                            {
-                                m_threadPool.QueueWorkItem(x =>
-                                {
-                                    try
-                                    {
-                                        req.DoHTTPGruntWork(m_server,
-                                            req.PollServiceArgs.NoEvents(req.RequestID, req.PollServiceArgs.Id));
-                                        byContextDequeue(req);
-                                    }
-                                    catch (ObjectDisposedException)
-                                    {
-                                    // Ignore it, no need to reply
-                                    }
-                                    return null;
-                                }, null);
-                            }
-                            else
-                            {
-                                ReQueueEvent(req);
-                            }
                         }
                     }
-                    catch (Exception e)
+                }
-                    {
+                catch (Exception e)
-                        m_log.ErrorFormat("Exception in poll service thread: " + e.ToString());
+                {
-                    }
+                    m_log.ErrorFormat("Exception in poll service thread: " + e.ToString());
                 }
             }
         }
-
     }
 }

OpenSim/Region/ClientStack/Linden/Caps/EventQueue/EventQueueGetModule.cs

@@ -372,7 +372,7 @@ namespace OpenSim.Region.ClientStack.Linden
 
             caps.RegisterPollHandler(
                 "EventQueueGet",
-                new PollServiceEventArgs(null, GenerateEqgCapPath(eventQueueGetUUID), HasEvents, GetEvents, NoEvents, agentID, SERVER_EQ_TIME_NO_EVENTS));
+                new PollServiceEventArgs(null, GenerateEqgCapPath(eventQueueGetUUID), HasEvents, GetEvents, NoEvents, Drop, agentID, SERVER_EQ_TIME_NO_EVENTS));
         }
 
         public bool HasEvents(UUID requestID, UUID agentID)
@@ -403,6 +403,10 @@ namespace OpenSim.Region.ClientStack.Linden
                     ev["message"], m_scene.GetScenePresence(agentId).Name, m_scene.Name);
             }
         }
+        public void Drop(UUID requestID, UUID pAgentId)
+        {
+            // do nothing for now, hope client close will do it        
+        }
 
         public Hashtable GetEvents(UUID requestID, UUID pAgentId)
         {

OpenSim/Region/ClientStack/Linden/Caps/GetMeshModule.cs

@@ -226,7 +226,7 @@ namespace OpenSim.Region.ClientStack.Linden
             private Scene m_scene;
             private MeshCapsDataThrottler m_throttler;
             public PollServiceMeshEventArgs(string uri, UUID pId, Scene scene) :
-                base(null, uri, null, null, null, pId, int.MaxValue)
+                base(null, uri, null, null, null, null, pId, int.MaxValue)
             {
                 m_scene = scene;
                 m_throttler = new MeshCapsDataThrottler(100000, 1400000, 10000, scene, pId);
@@ -241,6 +241,15 @@ namespace OpenSim.Region.ClientStack.Linden
 
                     }
                 };
+
+                Drop= (x, y) =>
+                {
+                    lock (responses)
+                    {
+                        responses.Remove(x);
+                    }
+                };
+
                 GetEvents = (x, y) =>
                 {
                     lock (responses)

OpenSim/Region/ClientStack/Linden/Caps/GetTextureModule.cs

@@ -222,7 +222,7 @@ namespace OpenSim.Region.ClientStack.Linden
             private Scene m_scene;
             private CapsDataThrottler m_throttler = new CapsDataThrottler(100000, 1400000,10000);
             public PollServiceTextureEventArgs(UUID pId, Scene scene) :
-                    base(null, "", null, null, null, pId, int.MaxValue)              
+                    base(null, "", null, null, null, null, pId, int.MaxValue)              
             {
                 m_scene = scene;
                 // x is request id, y is userid
@@ -236,6 +236,9 @@ namespace OpenSim.Region.ClientStack.Linden
 
                     }
                 };
+
+                Drop = (x, y) => { lock (responses) responses.Remove(x); };
+
                 GetEvents = (x, y) =>
                 {
                     lock (responses)
@@ -423,7 +426,6 @@ namespace OpenSim.Region.ClientStack.Linden
 
         internal sealed class CapsDataThrottler
         {
-
             private volatile int currenttime = 0;
             private volatile int lastTimeElapsed = 0;
             private volatile int BytesSent = 0;

OpenSim/Region/ClientStack/Linden/Caps/WebFetchInvDescModule.cs

@@ -256,11 +256,13 @@ namespace OpenSim.Region.ClientStack.Linden
             private WebFetchInvDescModule m_module;
 
             public PollServiceInventoryEventArgs(WebFetchInvDescModule module, string url, UUID pId) :
-                base(null, url, null, null, null, pId, int.MaxValue)
+                base(null, url, null, null, null, null, pId, int.MaxValue)
             {
                 m_module = module;
 
                 HasEvents = (x, y) => { lock (responses) return responses.ContainsKey(x); };
+                Drop = (x, y) => { lock (responses) responses.Remove(x); };
+
                 GetEvents = (x, y) =>
                 {
                     lock (responses)

OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs

@@ -225,7 +225,7 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
                 string uri = "/lslhttp/" + urlcode.ToString() + "/";
                
                 PollServiceEventArgs args 
-                    = new PollServiceEventArgs(HttpRequestHandler, uri, HasEvents, GetEvents, NoEvents, urlcode, 25000);
+                    = new PollServiceEventArgs(HttpRequestHandler, uri, HasEvents, GetEvents, NoEvents, Drop, urlcode, 25000);
                 args.Type = PollServiceEventArgs.EventType.LslHttp;
                 m_HttpServer.AddPollServiceHTTPHandler(uri, args);
 
@@ -276,7 +276,7 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
                 string uri = "/lslhttps/" + urlcode.ToString() + "/";
                
                 PollServiceEventArgs args 
-                    = new PollServiceEventArgs(HttpRequestHandler, uri, HasEvents, GetEvents, NoEvents, urlcode, 25000);
+                    = new PollServiceEventArgs(HttpRequestHandler, uri, HasEvents, GetEvents, NoEvents, Drop, urlcode, 25000);
                 args.Type = PollServiceEventArgs.EventType.LslHttp;
                 m_HttpsServer.AddPollServiceHTTPHandler(uri, args);
 
@@ -530,6 +530,28 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
                 }
             }
         }
+
+        private void Drop(UUID requestID, UUID sessionID)
+        {
+            UrlData url = null;
+            lock (m_RequestMap)
+            {
+                if (m_RequestMap.ContainsKey(requestID))
+                {
+                    url = m_RequestMap[requestID];
+                    m_RequestMap.Remove(requestID);
+                    if(url != null)
+                    {
+                        lock (url.requests)
+                        {
+                            if(url.requests.ContainsKey(requestID))
+                                url.requests.Remove(requestID);
+                        }
+                    }
+                }
+            }
+        }
+
         private Hashtable GetEvents(UUID requestID, UUID sessionID)
         {
             UrlData url = null;