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- /*
- * Copyright (c) Contributors, http://opensimulator.org/
- * See CONTRIBUTORS.TXT for a full list of copyright holders.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * * Neither the name of the OpenSim Project nor the
- * names of its contributors may be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- using System.Collections.Generic;
- using libsecondlife;
- using libsecondlife.Packets;
- using Nini.Config;
- using OpenSim.Framework;
- using OpenSim.Region.Environment.Interfaces;
- using OpenSim.Region.Environment.Scenes;
- namespace OpenSim.Region.Environment.Modules.Agent.AssetDownload
- {
- public class AssetDownloadModule : IRegionModule
- {
- /// <summary>
- /// Asset requests with data which are ready to be sent back to requesters. This includes textures.
- /// </summary>
- private List<AssetRequest> AssetRequests;
- private Scene m_scene;
- private Dictionary<LLUUID, Scene> RegisteredScenes = new Dictionary<LLUUID, Scene>();
- ///
- /// Assets requests (for each user) which are waiting for asset server data. This includes texture requests
- /// </summary>
- private Dictionary<LLUUID, Dictionary<LLUUID, AssetRequest>> RequestedAssets;
- public AssetDownloadModule()
- {
- RequestedAssets = new Dictionary<LLUUID, Dictionary<LLUUID, AssetRequest>>();
- AssetRequests = new List<AssetRequest>();
- }
- #region IRegionModule Members
- public void Initialise(Scene scene, IConfigSource config)
- {
- if (!RegisteredScenes.ContainsKey(scene.RegionInfo.RegionID))
- {
- RegisteredScenes.Add(scene.RegionInfo.RegionID, scene);
- // scene.EventManager.OnNewClient += NewClient;
- }
- if (m_scene == null)
- {
- m_scene = scene;
- // m_thread = new Thread(new ThreadStart(RunAssetQueue));
- // m_thread.Name = "AssetDownloadQueueThread";
- // m_thread.IsBackground = true;
- // m_thread.Start();
- // OpenSim.Framework.ThreadTracker.Add(m_thread);
- }
- }
- public void PostInitialise()
- {
- }
- public void Close()
- {
- }
- public string Name
- {
- get { return "AssetDownloadModule"; }
- }
- public bool IsSharedModule
- {
- get { return true; }
- }
- #endregion
- public void NewClient(IClientAPI client)
- {
- // client.OnRequestAsset += AddAssetRequest;
- }
- /// <summary>
- /// Make an asset request the result of which will be packeted up and sent directly back to the client.
- /// </summary>
- /// <param name="userInfo"></param>
- /// <param name="transferRequest"></param>
- public void AddAssetRequest(IClientAPI userInfo, TransferRequestPacket transferRequest)
- {
- LLUUID requestID = null;
- byte source = 2;
- if (transferRequest.TransferInfo.SourceType == 2)
- {
- //direct asset request
- requestID = new LLUUID(transferRequest.TransferInfo.Params, 0);
- }
- else if (transferRequest.TransferInfo.SourceType == 3)
- {
- //inventory asset request
- requestID = new LLUUID(transferRequest.TransferInfo.Params, 80);
- source = 3;
- //Console.WriteLine("asset request " + requestID);
- }
- //not found asset
- // so request from asset server
- Dictionary<LLUUID, AssetRequest> userRequests = null;
- if (RequestedAssets.TryGetValue(userInfo.AgentId, out userRequests))
- {
- if (!userRequests.ContainsKey(requestID))
- {
- AssetRequest request = new AssetRequest();
- request.RequestUser = userInfo;
- request.RequestAssetID = requestID;
- request.TransferRequestID = transferRequest.TransferInfo.TransferID;
- request.AssetRequestSource = source;
- request.Params = transferRequest.TransferInfo.Params;
- userRequests[requestID] = request;
- m_scene.AssetCache.GetAsset(requestID, AssetCallback, false);
- }
- }
- else
- {
- userRequests = new Dictionary<LLUUID, AssetRequest>();
- AssetRequest request = new AssetRequest();
- request.RequestUser = userInfo;
- request.RequestAssetID = requestID;
- request.TransferRequestID = transferRequest.TransferInfo.TransferID;
- request.AssetRequestSource = source;
- request.Params = transferRequest.TransferInfo.Params;
- userRequests.Add(requestID, request);
- RequestedAssets[userInfo.AgentId] = userRequests;
- m_scene.AssetCache.GetAsset(requestID, AssetCallback, false);
- }
- }
- public void AssetCallback(LLUUID assetID, AssetBase asset)
- {
- if (asset != null)
- {
- foreach (Dictionary<LLUUID, AssetRequest> userRequests in RequestedAssets.Values)
- {
- if (userRequests.ContainsKey(assetID))
- {
- AssetRequest req = userRequests[assetID];
- if (req != null)
- {
- req.AssetInf = asset;
- req.NumPackets = CalculateNumPackets(asset.Data);
- userRequests.Remove(assetID);
- AssetRequests.Add(req);
- }
- }
- }
- }
- }
- /// <summary>
- /// Calculate the number of packets required to send the asset to the client.
- /// </summary>
- /// <param name="data"></param>
- /// <returns></returns>
- private int CalculateNumPackets(byte[] data)
- {
- const uint m_maxPacketSize = 600;
- int numPackets = 1;
- if (data.LongLength > m_maxPacketSize)
- {
- // over max number of bytes so split up file
- long restData = data.LongLength - m_maxPacketSize;
- int restPackets = (int) ((restData + m_maxPacketSize - 1) / m_maxPacketSize);
- numPackets += restPackets;
- }
- return numPackets;
- }
- #region Nested type: AssetRequest
- public class AssetRequest
- {
- public AssetBase AssetInf;
- public byte AssetRequestSource = 2;
- public long DataPointer = 0;
- public int DiscardLevel = -1;
- public AssetBase ImageInfo;
- public bool IsTextureRequest;
- public int NumPackets = 0;
- public int PacketCounter = 0;
- public byte[] Params = null;
- public LLUUID RequestAssetID;
- public IClientAPI RequestUser;
- public LLUUID TransferRequestID;
- //public bool AssetInCache;
- //public int TimeRequested;
- public AssetRequest()
- {
- }
- }
- #endregion
- }
- }
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