* Tear down CAPS and http handlers when an agent leaves a region (via crossing, teleport or logout)

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -1498,11 +1498,7 @@ namespace OpenSim.Region.Environment.Scenes
                     }
                     m_sceneGridService.SendCloseChildAgentConnections(agentID, childknownRegions);
 
-                    if (m_capsHandlers.ContainsKey(agentID))
+                    RemoveCapsHandler(agentID);
-                    {
-                        m_capsHandlers[agentID].DeregisterHandlers();
-                        m_capsHandlers.Remove(agentID);
-                    }
                 }
 
                 m_eventManager.TriggerClientClosed(agentID);
@@ -1717,8 +1713,8 @@ namespace OpenSim.Region.Environment.Scenes
             String capsObjectPath = GetCapsPath(agentId);                
                 
             m_log.DebugFormat(
-                "[CONNECTION DEBUGGING]: Setting up CAPS handler for avatar {0} at {1} in {2}",
+                "[CONNECTION DEBUGGING]: Setting up CAPS handler for avatar {0} in {1}",
-                agentId, capsObjectPath, RegionInfo.RegionName);
+                agentId, RegionInfo.RegionName);
                 
             Caps cap =
                 new Caps(AssetCache, m_httpListener, m_regInfo.ExternalHostName, m_httpListener.Port,
@@ -1734,6 +1730,29 @@ namespace OpenSim.Region.Environment.Scenes
             m_capsHandlers[agentId] = cap;
         } 
 
+        /// <summary>
+        /// Remove the caps handler for a given agent.
+        /// </summary>
+        /// <param name="agentId"></param>
+        public void RemoveCapsHandler(LLUUID agentId)
+        {
+            if (m_capsHandlers.ContainsKey(agentId))
+            {
+                m_log.DebugFormat(
+                    "[CONNECTION DEBUGGING]: Removing CAPS handler for root agent {0} in {1}", 
+                    agentId, RegionInfo.RegionName);
+                
+                m_capsHandlers[agentId].DeregisterHandlers();
+                m_capsHandlers.Remove(agentId);
+            }
+            else
+            {
+                m_log.WarnFormat(
+                    "[CONNECTION DEBUGGING]: Received request to remove CAPS handler for root agent {0} in {1}, but no such CAPS handler found!",
+                    agentId, RegionInfo.RegionName);
+            }
+        }
+
         /// <summary>
         /// 
         /// </summary>

OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs

@@ -547,6 +547,12 @@ namespace OpenSim.Region.Environment.Scenes
                     if(destRegionUp)
                     {
                         avatar.Close();
+                        
+                        // Compared to ScenePresence.CrossToNewRegion(), there's no obvious code to handle a teleport 
+                        // failure at this point (unlike a border crossing failure).  So perhaps this can never fail
+                        // once we reach here...
+                        avatar.Scene.RemoveCapsHandler(avatar.UUID);
+                        
                         m_commsProvider.InterRegion.InformRegionOfChildAgent(regionHandle, agent);
                         m_commsProvider.InterRegion.ExpectAvatarCrossing(regionHandle, avatar.ControllingClient.AgentId,
                                                                      position, false);
@@ -557,6 +563,9 @@ namespace OpenSim.Region.Environment.Scenes
                             "http://" + reg.ExternalHostName + ":" + reg.HttpPort 
                             + "/CAPS/" + circuitdata.CapsPath + "0000/";  
                         
+                        m_log.DebugFormat(
+                            "[CONNECTION DEBUGGING]: Sending new CAPS seed url {0} to avatar {1}", capsPath, avatar.UUID);                        
+                        
                         avatar.ControllingClient.SendRegionTeleport(regionHandle, 13, reg.ExternalEndPoint, 4, (1 << 4),
                                                                     capsPath);
                         avatar.MakeChildAgent();

OpenSim/Region/Environment/Scenes/ScenePresence.cs

@@ -1619,6 +1619,11 @@ namespace OpenSim.Region.Environment.Scenes
             SimpleRegionInfo neighbourRegion = m_scene.RequestNeighbouringRegionInfo(neighbourHandle);
             if (neighbourRegion != null)
             {       
+                // When the neighbour is informed of the border crossing, it will set up CAPS handlers for the avatar
+                // This means we need to remove the current caps handler here and possibly compensate later, 
+                // in case both scenes are being hosted on the same region server.  Messy
+                m_scene.RemoveCapsHandler(UUID);                
+                
                 bool res =
                     m_scene.InformNeighbourOfCrossing(neighbourHandle, m_controllingClient.AgentId, newpos,
                                                       m_physicsActor.Flying);
@@ -1640,6 +1645,10 @@ namespace OpenSim.Region.Environment.Scenes
                     m_scene.SendKillObject(m_localId);
                     m_scene.NotifyMyCoarseLocationChange();
                 }
+                else
+                {
+                    m_scene.AddCapsHandler(UUID);
+                }
             }
         }