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422 lines
14 KiB
C#
422 lines
14 KiB
C#
/*
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* Copyright (c) Contributors, http://opensimulator.org/
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* See CONTRIBUTORS.TXT for a full list of copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the OpenSimulator Project nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.Concurrent;
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using System.Reflection;
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using System.Threading;
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using log4net;
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using Nini.Config;
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using Mono.Addins;
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using OpenMetaverse;
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using OpenSim.Framework;
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using OpenSim.Framework.Servers;
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using OpenSim.Framework.Servers.HttpServer;
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using OpenSim.Region.Framework.Interfaces;
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using OpenSim.Region.Framework.Scenes;
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using OpenSim.Services.Interfaces;
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using Caps = OpenSim.Framework.Capabilities.Caps;
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using OpenSim.Capabilities.Handlers;
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using OpenSim.Framework.Monitoring;
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namespace OpenSim.Region.ClientStack.Linden
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{
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[Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "GetTextureModule")]
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public class GetTextureModule : INonSharedRegionModule
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{
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class APollRequest
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{
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public PollServiceTextureEventArgs thepoll;
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public UUID reqID;
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public Hashtable request;
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public bool send503;
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}
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public class APollResponse
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{
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public Hashtable response;
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public int bytes;
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}
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private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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private Scene m_scene;
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private static GetTextureHandler m_getTextureHandler;
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private IAssetService m_assetService = null;
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private Dictionary<UUID, string> m_capsDict = new Dictionary<UUID, string>();
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private static Thread[] m_workerThreads = null;
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private static int m_NumberScenes = 0;
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private static BlockingCollection<APollRequest> m_queue = new BlockingCollection<APollRequest>();
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private Dictionary<UUID,PollServiceTextureEventArgs> m_pollservices = new Dictionary<UUID,PollServiceTextureEventArgs>();
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private string m_Url = "localhost";
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#region ISharedRegionModule Members
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public void Initialise(IConfigSource source)
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{
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IConfig config = source.Configs["ClientStack.LindenCaps"];
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if (config == null)
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return;
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/*
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m_URL = config.GetString("Cap_GetTexture", string.Empty);
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// Cap doesn't exist
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if (m_URL != string.Empty)
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{
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m_Enabled = true;
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m_RedirectURL = config.GetString("GetTextureRedirectURL");
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}
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*/
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m_Url = config.GetString("Cap_GetTexture", "localhost");
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}
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public void AddRegion(Scene s)
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{
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m_scene = s;
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}
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public void RemoveRegion(Scene s)
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{
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s.EventManager.OnRegisterCaps -= RegisterCaps;
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s.EventManager.OnDeregisterCaps -= DeregisterCaps;
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m_NumberScenes--;
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m_scene = null;
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}
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public void RegionLoaded(Scene s)
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{
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if(m_assetService == null)
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{
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m_assetService = s.RequestModuleInterface<IAssetService>();
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// We'll reuse the same handler for all requests.
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m_getTextureHandler = new GetTextureHandler(m_assetService);
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}
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s.EventManager.OnRegisterCaps += RegisterCaps;
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s.EventManager.OnDeregisterCaps += DeregisterCaps;
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m_NumberScenes++;
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if (m_workerThreads == null)
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{
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m_workerThreads = new Thread[2];
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for (uint i = 0; i < 2; i++)
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{
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m_workerThreads[i] = WorkManager.StartThread(DoTextureRequests,
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String.Format("GetTextureWorker{0}", i),
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ThreadPriority.Normal,
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true,
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false,
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null,
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int.MaxValue);
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}
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}
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}
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public void PostInitialise()
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{
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}
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public void Close()
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{
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if(m_NumberScenes <= 0 && m_workerThreads != null)
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{
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m_log.DebugFormat("[GetTextureModule] Closing");
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foreach (Thread t in m_workerThreads)
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Watchdog.AbortThread(t.ManagedThreadId);
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m_queue.Dispose();
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}
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}
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public string Name { get { return "GetTextureModule"; } }
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public Type ReplaceableInterface
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{
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get { return null; }
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}
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#endregion
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private class PollServiceTextureEventArgs : PollServiceEventArgs
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{
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private List<Hashtable> requests =
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new List<Hashtable>();
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private Dictionary<UUID, APollResponse> responses =
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new Dictionary<UUID, APollResponse>();
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private HashSet<UUID> dropedResponses = new HashSet<UUID>();
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private Scene m_scene;
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private ScenePresence m_presence;
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public PollServiceTextureEventArgs(UUID pId, Scene scene) :
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base(null, "", null, null, null, null, pId, int.MaxValue)
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{
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m_scene = scene;
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// x is request id, y is userid
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HasEvents = (x, y) =>
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{
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lock (responses)
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{
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APollResponse response;
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if (responses.TryGetValue(x, out response))
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{
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if (m_presence == null)
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m_presence = m_scene.GetScenePresence(pId);
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if (m_presence == null || m_presence.IsDeleted)
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return true;
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return m_presence.CapCanSendAsset(0, response.bytes);
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}
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return false;
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}
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};
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Drop = (x, y) =>
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{
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lock (responses)
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{
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responses.Remove(x);
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dropedResponses.Add(x);
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}
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};
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GetEvents = (x, y) =>
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{
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lock (responses)
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{
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try
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{
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return responses[x].response;
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}
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finally
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{
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responses.Remove(x);
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}
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}
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};
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// x is request id, y is request data hashtable
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Request = (x, y) =>
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{
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APollRequest reqinfo = new APollRequest();
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reqinfo.thepoll = this;
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reqinfo.reqID = x;
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reqinfo.request = y;
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reqinfo.send503 = false;
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lock (responses)
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{
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if (responses.Count > 0)
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{
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if (m_queue.Count >= 4)
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{
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// Never allow more than 4 fetches to wait
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reqinfo.send503 = true;
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}
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}
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}
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m_queue.Add(reqinfo);
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};
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// this should never happen except possible on shutdown
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NoEvents = (x, y) =>
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{
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/*
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lock (requests)
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{
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Hashtable request = requests.Find(id => id["RequestID"].ToString() == x.ToString());
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requests.Remove(request);
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}
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*/
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Hashtable response = new Hashtable();
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response["int_response_code"] = 500;
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response["str_response_string"] = "Script timeout";
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response["content_type"] = "text/plain";
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response["keepalive"] = false;
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return response;
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};
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}
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public void Process(APollRequest requestinfo)
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{
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Hashtable response;
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UUID requestID = requestinfo.reqID;
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if(m_scene.ShuttingDown)
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return;
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lock (responses)
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{
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lock(dropedResponses)
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{
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if(dropedResponses.Contains(requestID))
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{
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dropedResponses.Remove(requestID);
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return;
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}
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}
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if (requestinfo.send503)
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{
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response = new Hashtable();
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response["int_response_code"] = 503;
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response["str_response_string"] = "Throttled";
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response["content_type"] = "text/plain";
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response["keepalive"] = false;
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Hashtable headers = new Hashtable();
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headers["Retry-After"] = 30;
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response["headers"] = headers;
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responses[requestID] = new APollResponse() {bytes = 0, response = response};
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return;
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}
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// If the avatar is gone, don't bother to get the texture
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if (m_scene.GetScenePresence(Id) == null)
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{
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response = new Hashtable();
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response["int_response_code"] = 500;
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response["str_response_string"] = "Script timeout";
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response["content_type"] = "text/plain";
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response["keepalive"] = false;
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responses[requestID] = new APollResponse() {bytes = 0, response = response};
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return;
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}
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}
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response = m_getTextureHandler.Handle(requestinfo.request);
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lock (responses)
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{
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lock(dropedResponses)
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{
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if(dropedResponses.Contains(requestID))
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{
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dropedResponses.Remove(requestID);
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return;
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}
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}
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responses[requestID] = new APollResponse()
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{
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bytes = (int) response["int_bytes"],
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response = response
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};
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}
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}
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}
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private void RegisterCaps(UUID agentID, Caps caps)
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{
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if (m_Url == "localhost")
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{
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string capUrl = "/CAPS/" + UUID.Random() + "/";
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// Register this as a poll service
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PollServiceTextureEventArgs args = new PollServiceTextureEventArgs(agentID, m_scene);
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args.Type = PollServiceEventArgs.EventType.Texture;
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MainServer.Instance.AddPollServiceHTTPHandler(capUrl, args);
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string hostName = m_scene.RegionInfo.ExternalHostName;
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uint port = (MainServer.Instance == null) ? 0 : MainServer.Instance.Port;
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string protocol = "http";
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if (MainServer.Instance.UseSSL)
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{
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hostName = MainServer.Instance.SSLCommonName;
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port = MainServer.Instance.SSLPort;
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protocol = "https";
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}
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IExternalCapsModule handler = m_scene.RequestModuleInterface<IExternalCapsModule>();
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if (handler != null)
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handler.RegisterExternalUserCapsHandler(agentID, caps, "GetTexture", capUrl);
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else
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caps.RegisterHandler("GetTexture", String.Format("{0}://{1}:{2}{3}", protocol, hostName, port, capUrl));
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m_pollservices[agentID] = args;
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m_capsDict[agentID] = capUrl;
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}
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else
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{
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caps.RegisterHandler("GetTexture", m_Url);
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}
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}
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private void DeregisterCaps(UUID agentID, Caps caps)
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{
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PollServiceTextureEventArgs args;
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MainServer.Instance.RemoveHTTPHandler("", m_Url);
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m_capsDict.Remove(agentID);
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if (m_pollservices.TryGetValue(agentID, out args))
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{
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m_pollservices.Remove(agentID);
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}
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}
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private static void DoTextureRequests()
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{
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APollRequest poolreq;
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while (m_NumberScenes > 0)
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{
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poolreq = null;
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if(!m_queue.TryTake(out poolreq, 4500) || poolreq == null)
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{
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Watchdog.UpdateThread();
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continue;
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}
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if(m_NumberScenes <= 0)
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break;
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Watchdog.UpdateThread();
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if(poolreq.reqID != UUID.Zero)
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poolreq.thepoll.Process(poolreq);
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}
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}
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}
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}
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