From 442b27222828381a27c7c5eddc967a0de4c82d0a Mon Sep 17 00:00:00 2001
From: UbitUmarov
Date: Sun, 17 Jul 2016 13:20:56 +0100
Subject: 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

---
 .../HttpServer/PollServiceRequestManager.cs        | 95 ++++++++++++++--------
 1 file changed, 63 insertions(+), 32 deletions(-)

(limited to 'OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs')

diff --git a/OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs b/OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs
index ffcad0f..5b40590 100644
--- a/OpenSim/Framework/Servers/HttpServer/PollServiceRequestManager.cs
+++ b/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
                 {
-                    try
+                    if(!req.HttpContext.CanSend())
                     {
-                        if (req.PollServiceArgs.HasEvents(req.RequestID, req.PollServiceArgs.Id))
+                        req.PollServiceArgs.Drop(req.RequestID, req.PollServiceArgs.Id);
+                        byContextDequeue(req);
+                        continue;
+                    }
+
+                    if(req.HttpContext.IsSending())
+                    {
+                        if ((Environment.TickCount - req.RequestTime) > req.PollServiceArgs.TimeOutms)
                         {
-                            Hashtable responsedata = req.PollServiceArgs.GetEvents(req.RequestID, req.PollServiceArgs.Id);
+                            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)
-                            {
-                                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);
-                            }
+                            ReQueueEvent(req);
                         }
                     }
-                    catch (Exception e)
-                    {
-                        m_log.ErrorFormat("Exception in poll service thread: " + e.ToString());
-                    }
+                }
+                catch (Exception e)
+                {
+                    m_log.ErrorFormat("Exception in poll service thread: " + e.ToString());
                 }
             }
         }
-
     }
 }
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