Add the HGRemoteAssetService. Allows to use any asset service with HG
Melanie Thielker
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/*
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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.Generic;
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using System.IO;
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using System.Reflection;
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using System.Xml;
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using Nini.Config;
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using log4net;
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using OpenMetaverse;
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using OpenSim.Framework;
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using OpenSim.Framework.Serialization.External;
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using OpenSim.Server.Base;
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using OpenSim.Services.Interfaces;
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using OpenSim.Services.AssetService;
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namespace OpenSim.Services.HypergridService
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{
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/// <summary>
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/// Hypergrid asset service. It serves the IAssetService interface,
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/// but implements it in ways that are appropriate for inter-grid
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/// asset exchanges.
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/// </summary>
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public class HGRemoteAssetService : IAssetService
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{
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private static readonly ILog m_log =
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LogManager.GetLogger(
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MethodBase.GetCurrentMethod().DeclaringType);
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private string m_HomeURL;
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private IUserAccountService m_UserAccountService;
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private IAssetService m_assetConnector;
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private UserAccountCache m_Cache;
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private AssetPermissions m_AssetPerms;
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public HGRemoteAssetService(IConfigSource config, string configName)
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{
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m_log.Debug("[HGRemoteAsset Service]: Starting");
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IConfig assetConfig = config.Configs[configName];
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if (assetConfig == null)
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throw new Exception("No HGAssetService configuration");
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Object[] args = new Object[] { config };
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string assetConnectorDll = assetConfig.GetString("AssetConnector", String.Empty);
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if (assetConnectorDll == String.Empty)
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throw new Exception("Please specify AssetConnector in HGAssetService configuration");
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m_assetConnector = ServerUtils.LoadPlugin<IAssetService>(assetConnectorDll, args);
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if (m_assetConnector == null)
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throw new Exception(String.Format("Unable to create AssetConnector from {0}", assetConnectorDll));
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string userAccountsDll = assetConfig.GetString("UserAccountsService", string.Empty);
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if (userAccountsDll == string.Empty)
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throw new Exception("Please specify UserAccountsService in HGAssetService configuration");
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m_UserAccountService = ServerUtils.LoadPlugin<IUserAccountService>(userAccountsDll, args);
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if (m_UserAccountService == null)
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throw new Exception(String.Format("Unable to create UserAccountService from {0}", userAccountsDll));
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m_HomeURL = Util.GetConfigVarFromSections<string>(config, "HomeURI",
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new string[] { "Startup", "Hypergrid", configName }, string.Empty);
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if (m_HomeURL == string.Empty)
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throw new Exception("[HGAssetService] No HomeURI specified");
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m_Cache = UserAccountCache.CreateUserAccountCache(m_UserAccountService);
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// Permissions
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m_AssetPerms = new AssetPermissions(assetConfig);
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}
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#region IAssetService overrides
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public AssetBase Get(string id)
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{
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AssetBase asset = m_assetConnector.Get(id);
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if (asset == null)
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return null;
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if (!m_AssetPerms.AllowedExport(asset.Type))
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return null;
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if (asset.Metadata.Type == (sbyte)AssetType.Object)
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asset.Data = AdjustIdentifiers(asset.Data);
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AdjustIdentifiers(asset.Metadata);
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return asset;
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}
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public AssetMetadata GetMetadata(string id)
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{
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AssetMetadata meta = m_assetConnector.GetMetadata(id);
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if (meta == null)
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return null;
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AdjustIdentifiers(meta);
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return meta;
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}
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public byte[] GetData(string id)
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{
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AssetBase asset = Get(id);
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if (asset == null)
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return null;
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if (!m_AssetPerms.AllowedExport(asset.Type))
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return null;
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// Deal with bug introduced in Oct. 20 (1eb3e6cc43e2a7b4053bc1185c7c88e22356c5e8)
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// Fix bad assets before sending them elsewhere
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if (asset.Type == (int)AssetType.Object && asset.Data != null)
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{
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string xml = ExternalRepresentationUtils.SanitizeXml(Utils.BytesToString(asset.Data));
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asset.Data = Utils.StringToBytes(xml);
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}
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return asset.Data;
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}
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// public delegate void AssetRetrieved(string id, Object sender, AssetBase asset);
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public virtual bool Get(string id, Object sender, AssetRetrieved handler)
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{
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return m_assetConnector.Get(id, sender, (i, s, asset) =>
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{
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if (asset != null)
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{
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if (!m_AssetPerms.AllowedExport(asset.Type))
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{
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asset = null;
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}
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else
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{
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if (asset.Metadata.Type == (sbyte)AssetType.Object)
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asset.Data = AdjustIdentifiers(asset.Data);
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AdjustIdentifiers(asset.Metadata);
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}
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}
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handler(i, s, asset);
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});
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}
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public string Store(AssetBase asset)
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{
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if (!m_AssetPerms.AllowedImport(asset.Type))
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return string.Empty;
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// Deal with bug introduced in Oct. 20 (1eb3e6cc43e2a7b4053bc1185c7c88e22356c5e8)
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// Fix bad assets before storing on this server
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if (asset.Type == (int)AssetType.Object && asset.Data != null)
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{
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string xml = ExternalRepresentationUtils.SanitizeXml(Utils.BytesToString(asset.Data));
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asset.Data = Utils.StringToBytes(xml);
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}
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return m_assetConnector.Store(asset);
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}
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public bool Delete(string id)
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{
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// NOGO
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return false;
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}
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#endregion
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protected void AdjustIdentifiers(AssetMetadata meta)
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{
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if (meta == null || m_Cache == null)
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return;
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UserAccount creator = m_Cache.GetUser(meta.CreatorID);
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if (creator != null)
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meta.CreatorID = meta.CreatorID + ";" + m_HomeURL + "/" + creator.FirstName + " " + creator.LastName;
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}
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// Only for Object
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protected byte[] AdjustIdentifiers(byte[] data)
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{
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string xml = Utils.BytesToString(data);
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// Deal with bug introduced in Oct. 20 (1eb3e6cc43e2a7b4053bc1185c7c88e22356c5e8)
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// Fix bad assets before sending them elsewhere
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xml = ExternalRepresentationUtils.SanitizeXml(xml);
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return Utils.StringToBytes(ExternalRepresentationUtils.RewriteSOP(xml, "HGAssetService", m_HomeURL, m_Cache, UUID.Zero));
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}
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public AssetBase GetCached(string id)
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{
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return Get(id);
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}
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public bool[] AssetsExist(string[] ids)
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{
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return m_assetConnector.AssetsExist(ids);
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}
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public bool UpdateContent(string id, byte[] data)
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{
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// SO not happening!!
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return false;
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}
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}
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}
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