cache bad folders requests for 30s. Suitcase can induce a ton of this, and viewers keep requesting

OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescHandler.cs

@@ -62,11 +62,12 @@ namespace OpenSim.Capabilities.Handlers
             m_Scene = s;
         }
 
-        public void FetchInventoryDescendentsRequest(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse)
+        public void FetchInventoryDescendentsRequest(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, ExpiringKey<UUID> BadRequests)
         {
             //m_log.DebugFormat("[XXX]: FetchInventoryDescendentsRequest in {0}, {1}", (m_Scene == null) ? "none" : m_Scene.Name, request);
 
             List<LLSDFetchInventoryDescendents> folders = null;
+            List<UUID> bad_folders = new List<UUID>();
             try
             {
                 OSDArray foldersrequested = null;
@@ -83,12 +84,19 @@ namespace OpenSim.Capabilities.Handlers
 
                 folders = new List<LLSDFetchInventoryDescendents>(foldersrequested.Count);
                 for (int i = 0; i < foldersrequested.Count; i++)
+                {
+                    OSDMap mfolder = foldersrequested[i] as OSDMap;
+                    UUID id = mfolder["folder_id"].AsUUID();
+                    if(BadRequests.ContainsKey(id))
+                    {
+                        bad_folders.Add(id);
+                    }
+                    else
                     {
                         LLSDFetchInventoryDescendents llsdRequest = new LLSDFetchInventoryDescendents();
                         try
                         {
-                        OSDMap mfolder = (OSDMap)foldersrequested[i];
+                            llsdRequest.folder_id = id;
-                        llsdRequest.folder_id = mfolder["folder_id"].AsUUID();
                             llsdRequest.owner_id = mfolder["owner_id"].AsUUID();
                             llsdRequest.sort_order = mfolder["sort_order"].AsInteger();
                             llsdRequest.fetch_folders = mfolder["fetch_folders"].AsBoolean();
@@ -101,6 +109,7 @@ namespace OpenSim.Capabilities.Handlers
                         }
                         folders.Add(llsdRequest);
                     }
+                }
                 foldersrequested = null;
                 tmp = null;
             }
@@ -112,12 +121,23 @@ namespace OpenSim.Capabilities.Handlers
             }
 
             if (folders == null || folders.Count == 0)
+            {
+                if(bad_folders.Count == 0)
                 {
                     httpResponse.RawBuffer = EmptyResponse;
                     return;
                 }
-
+                StringBuilder sb = osStringBuilderCache.Acquire();
-            List<UUID> bad_folders = new List<UUID>();
+                sb.Append("<llsd><map><key>folders</key><array /></map><map><key>bad_folders</key><array>");
+                foreach (UUID bad in bad_folders)
+                {
+                    sb.Append("<map><key>folder_id</key><uuid>");
+                    sb.Append(bad.ToString());
+                    sb.Append("</uuid><key>error</key><string>Unknown</string></map>");
+                }
+                sb.Append("</array></map></llsd>");
+                httpResponse.RawBuffer = Util.UTF8NBGetbytes(osStringBuilderCache.GetStringAndRelease(sb));
+            }
 
             int total_folders = 0;
             int total_items = 0;
@@ -206,6 +226,7 @@ namespace OpenSim.Capabilities.Handlers
                 lastresponse.Append("<map><key>bad_folders</key><array>");
                 foreach (UUID bad in bad_folders)
                 {
+                    BadRequests.Add(bad);
                     lastresponse.Append("<map><key>folder_id</key><uuid>");
                     lastresponse.Append(bad.ToString());
                     lastresponse.Append("</uuid><key>error</key><string>Unknown</string></map>");

OpenSim/Capabilities/Handlers/FetchInventory/FetchInvDescServerConnector.cs

@@ -29,9 +29,12 @@ using System;
 using Nini.Config;
 using OpenSim.Server.Base;
 using OpenSim.Services.Interfaces;
+using OpenSim.Framework;
 using OpenSim.Framework.Servers.HttpServer;
 using OpenSim.Server.Handlers.Base;
 using OpenMetaverse;
+using OpenMetaverse.StructuredData;
+
 
 namespace OpenSim.Capabilities.Handlers
 {
@@ -67,9 +70,15 @@ namespace OpenSim.Capabilities.Handlers
             m_LibraryService =
                     ServerUtils.LoadPlugin<ILibraryService>(libService, args);
 
+            ExpiringKey<UUID> m_badRequests = new ExpiringKey<UUID>(30000);
+
             FetchInvDescHandler webFetchHandler = new FetchInvDescHandler(m_InventoryService, m_LibraryService, null);
             ISimpleStreamHandler reqHandler
-                = new SimpleStreamHandler( "/CAPS/WebFetchInvDesc/", webFetchHandler.FetchInventoryDescendentsRequest);
+                = new SimpleStreamHandler("/CAPS/WebFetchInvDesc/", delegate(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse)
+                { 
+                    webFetchHandler.FetchInventoryDescendentsRequest(httpRequest, httpResponse, m_badRequests);
+                });
+
             server.AddSimpleStreamHandler(reqHandler);
         }
     }

OpenSim/Capabilities/Handlers/FetchInventory/FetchInventory2Handler.cs

@@ -108,22 +108,31 @@ namespace OpenSim.Capabilities.Handlers
             return LLSDxmlEncode.End(lsl);
         }
 
-        public void FetchInventorySimpleRequest(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, OSDMap requestmap)
+        public void FetchInventorySimpleRequest(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, OSDMap requestmap, ExpiringKey<UUID> BadRequests)
         {
             //m_log.DebugFormat("[FETCH INVENTORY HANDLER]: Received FetchInventory capability request {0}", request);
 
+            if(BadRequests == null)
+            {
+                httpResponse.StatusCode = (int)HttpStatusCode.NotFound;
+                return;
+            }
+
             OSDArray itemsRequested = (OSDArray)requestmap["items"];
 
             UUID[] itemIDs = new UUID[itemsRequested.Count];
             int i = 0;
             foreach (OSDMap osdItemId in itemsRequested)
             {
-                itemIDs[i++] = osdItemId["item_id"].AsUUID();
+                UUID id = osdItemId["item_id"].AsUUID();
+                if(!BadRequests.ContainsKey(id))
+                    itemIDs[i++] = id;
             }
 
             InventoryItemBase[] items = null;
             try
             {
+                // badrequests still not filled
                 items = m_inventoryService.GetMultipleItems(m_agentID, itemIDs);
             }
             catch{ }

OpenSim/Capabilities/Handlers/FetchInventory/Tests/FetchInventoryDescendents2HandlerTests.cs

@@ -131,10 +131,11 @@ namespace OpenSim.Capabilities.Handlers.FetchInventory.Tests
         {
             TestOSHttpRequest req = new TestOSHttpRequest();
             TestOSHttpResponse resp = new TestOSHttpResponse();
+            using(ExpiringKey<UUID> bad = new ExpiringKey<UUID>(5000)) // bad but this is test
             using (MemoryStream ms = new MemoryStream(Utils.StringToBytes(request), false))
             {
                 req.InputStream = ms;
-                handler.FetchInventoryDescendentsRequest(req, resp);
+                handler.FetchInventoryDescendentsRequest(req, resp, bad);
             }
             return Util.UTF8.GetString(resp.RawBuffer);
         }

OpenSim/Region/ClientStack/Linden/Caps/FetchInventory2Module.cs

@@ -28,7 +28,9 @@
 using Mono.Addins;
 using Nini.Config;
 using OpenMetaverse;
+using OpenMetaverse.StructuredData;
 using OpenSim.Capabilities.Handlers;
+using OpenSim.Framework;
 using OpenSim.Framework.Servers.HttpServer;
 using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
@@ -53,6 +55,7 @@ namespace OpenSim.Region.ClientStack.Linden
         private IInventoryService m_inventoryService = null;
         private ILibraryService m_LibraryService = null;
         private string m_fetchInventory2Url;
+        private ExpiringKey<UUID> m_badRequests;
 
         #region ISharedRegionModule Members
 
@@ -83,6 +86,8 @@ namespace OpenSim.Region.ClientStack.Linden
             {
                 m_inventoryService = null;
                 m_LibraryService = null;
+                m_badRequests.Dispose();
+                m_badRequests = null;
             }
         }
 
@@ -96,6 +101,9 @@ namespace OpenSim.Region.ClientStack.Linden
             if(m_LibraryService == null)
                 m_LibraryService = s.LibraryService;
 
+            if(m_badRequests == null)
+                m_badRequests = new ExpiringKey<UUID>(30000);
+
             if (m_inventoryService != null)
             {
                 s.EventManager.OnRegisterCaps += RegisterCaps;
@@ -122,7 +130,11 @@ namespace OpenSim.Region.ClientStack.Linden
             {
                 FetchInventory2Handler fetchHandler = new FetchInventory2Handler(m_inventoryService, agentID);
                 caps.RegisterSimpleHandler("FetchInventory2",
-                    new SimpleOSDMapHandler("POST", "/" + UUID.Random(), fetchHandler.FetchInventorySimpleRequest));
+                    new SimpleOSDMapHandler("POST", "/" + UUID.Random(), delegate (IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, OSDMap map)
+                    {
+                        fetchHandler.FetchInventorySimpleRequest(httpRequest, httpResponse, map, m_badRequests);
+                    }
+                 ));
             }
             else
             {

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

@@ -37,6 +37,7 @@ using log4net;
 using Nini.Config;
 using Mono.Addins;
 using OpenMetaverse;
+using OpenSim.Framework;
 using OpenSim.Framework.Servers.HttpServer;
 using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
@@ -90,6 +91,7 @@ namespace OpenSim.Region.ClientStack.Linden
         private ILibraryService m_LibraryService;
 
         private bool m_Enabled;
+        private ExpiringKey<UUID> m_badRequests;
 
         private string m_fetchInventoryDescendents2Url;
 //        private string m_webFetchInventoryDescendentsUrl;
@@ -193,6 +195,9 @@ namespace OpenSim.Region.ClientStack.Linden
 
             Scene.EventManager.OnRegisterCaps += RegisterCaps;
 
+            if(m_badRequests == null)
+                m_badRequests = new ExpiringKey<UUID>(30000);
+
             m_NumberScenes++;
 
             int nworkers = 2; // was 2
@@ -231,6 +236,8 @@ namespace OpenSim.Region.ClientStack.Linden
                         Watchdog.AbortThread(t.ManagedThreadId);
 
                     m_workerThreads = null;
+                    m_badRequests.Dispose();
+                    m_badRequests = null;
                 }
             }
 //            m_queue.Dispose();
@@ -331,7 +338,7 @@ namespace OpenSim.Region.ClientStack.Linden
                 }
 
                 OSHttpResponse osresponse = new OSHttpResponse(requestinfo.request);
-                m_webFetchHandler.FetchInventoryDescendentsRequest(requestinfo.request, osresponse);
+                m_webFetchHandler.FetchInventoryDescendentsRequest(requestinfo.request, osresponse, m_module.m_badRequests);
                 requestinfo.request.InputStream.Dispose();
 
                 lock (responses)