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Refactored the GetMesh module into a handler and a module, to be the same as GetTexture.
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Diva Canto
357
OpenSim/Capabilities/Handlers/GetTexture/GetTextureHandler.cs
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357
OpenSim/Capabilities/Handlers/GetTexture/GetTextureHandler.cs
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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;
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using System.Collections.Specialized;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Reflection;
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using System.IO;
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using System.Web;
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using log4net;
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using Nini.Config;
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using OpenMetaverse;
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using OpenMetaverse.StructuredData;
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using OpenMetaverse.Imaging;
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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.Services.Interfaces;
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using Caps = OpenSim.Framework.Capabilities.Caps;
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namespace OpenSim.Capabilities.Handlers
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{
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public class GetTextureHandler : BaseStreamHandler
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{
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private static readonly ILog m_log =
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LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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private IAssetService m_assetService;
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public const string DefaultFormat = "x-j2c";
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// TODO: Change this to a config option
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const string REDIRECT_URL = null;
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public GetTextureHandler(string path, IAssetService assService) :
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base("GET", path)
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{
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m_assetService = assService;
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}
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public override byte[] Handle(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse)
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{
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// Try to parse the texture ID from the request URL
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NameValueCollection query = HttpUtility.ParseQueryString(httpRequest.Url.Query);
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string textureStr = query.GetOne("texture_id");
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string format = query.GetOne("format");
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m_log.DebugFormat("[GETTEXTURE]: called {0}", textureStr);
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if (m_assetService == null)
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{
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m_log.Error("[GETTEXTURE]: Cannot fetch texture " + textureStr + " without an asset service");
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httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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return null;
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}
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UUID textureID;
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if (!String.IsNullOrEmpty(textureStr) && UUID.TryParse(textureStr, out textureID))
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{
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string[] formats;
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if (format != null && format != string.Empty)
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{
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formats = new string[1] { format.ToLower() };
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}
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else
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{
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formats = WebUtil.GetPreferredImageTypes(httpRequest.Headers.Get("Accept"));
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if (formats.Length == 0)
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formats = new string[1] { DefaultFormat }; // default
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}
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// OK, we have an array with preferred formats, possibly with only one entry
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httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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foreach (string f in formats)
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{
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if (FetchTexture(httpRequest, httpResponse, textureID, f))
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break;
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}
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}
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else
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{
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m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url);
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}
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httpResponse.Send();
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return null;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="httpRequest"></param>
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/// <param name="httpResponse"></param>
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/// <param name="textureID"></param>
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/// <param name="format"></param>
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/// <returns>False for "caller try another codec"; true otherwise</returns>
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private bool FetchTexture(OSHttpRequest httpRequest, OSHttpResponse httpResponse, UUID textureID, string format)
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{
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// m_log.DebugFormat("[GETTEXTURE]: {0} with requested format {1}", textureID, format);
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AssetBase texture;
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string fullID = textureID.ToString();
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if (format != DefaultFormat)
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fullID = fullID + "-" + format;
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if (!String.IsNullOrEmpty(REDIRECT_URL))
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{
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// Only try to fetch locally cached textures. Misses are redirected
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texture = m_assetService.GetCached(fullID);
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if (texture != null)
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{
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if (texture.Type != (sbyte)AssetType.Texture)
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{
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httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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return true;
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}
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WriteTextureData(httpRequest, httpResponse, texture, format);
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}
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else
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{
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string textureUrl = REDIRECT_URL + textureID.ToString();
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m_log.Debug("[GETTEXTURE]: Redirecting texture request to " + textureUrl);
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httpResponse.RedirectLocation = textureUrl;
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return true;
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}
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}
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else // no redirect
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{
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// try the cache
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texture = m_assetService.GetCached(fullID);
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if (texture == null)
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{
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//m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache");
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// Fetch locally or remotely. Misses return a 404
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texture = m_assetService.Get(textureID.ToString());
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if (texture != null)
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{
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if (texture.Type != (sbyte)AssetType.Texture)
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{
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httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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return true;
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}
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if (format == DefaultFormat)
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{
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WriteTextureData(httpRequest, httpResponse, texture, format);
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return true;
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}
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else
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{
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AssetBase newTexture = new AssetBase(texture.ID + "-" + format, texture.Name, (sbyte)AssetType.Texture, texture.Metadata.CreatorID);
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newTexture.Data = ConvertTextureData(texture, format);
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if (newTexture.Data.Length == 0)
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return false; // !!! Caller try another codec, please!
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newTexture.Flags = AssetFlags.Collectable;
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newTexture.Temporary = true;
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m_assetService.Store(newTexture);
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WriteTextureData(httpRequest, httpResponse, newTexture, format);
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return true;
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}
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}
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}
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else // it was on the cache
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{
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//m_log.DebugFormat("[GETTEXTURE]: texture was in the cache");
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WriteTextureData(httpRequest, httpResponse, texture, format);
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return true;
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}
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}
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// not found
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// m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found");
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httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound;
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return true;
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}
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private void WriteTextureData(OSHttpRequest request, OSHttpResponse response, AssetBase texture, string format)
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{
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string range = request.Headers.GetOne("Range");
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//m_log.DebugFormat("[GETTEXTURE]: Range {0}", range);
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if (!String.IsNullOrEmpty(range)) // JP2's only
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{
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// Range request
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int start, end;
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if (TryParseRange(range, out start, out end))
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{
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// Before clamping start make sure we can satisfy it in order to avoid
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// sending back the last byte instead of an error status
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if (start >= texture.Data.Length)
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{
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response.StatusCode = (int)System.Net.HttpStatusCode.RequestedRangeNotSatisfiable;
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return;
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}
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end = Utils.Clamp(end, 0, texture.Data.Length - 1);
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start = Utils.Clamp(start, 0, end);
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int len = end - start + 1;
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//m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID);
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if (len < texture.Data.Length)
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response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent;
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response.ContentLength = len;
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response.ContentType = texture.Metadata.ContentType;
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response.AddHeader("Content-Range", String.Format("bytes {0}-{1}/{2}", start, end, texture.Data.Length));
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response.Body.Write(texture.Data, start, len);
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}
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else
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{
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m_log.Warn("[GETTEXTURE]: Malformed Range header: " + range);
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response.StatusCode = (int)System.Net.HttpStatusCode.BadRequest;
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}
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}
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else // JP2's or other formats
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{
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// Full content request
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response.StatusCode = (int)System.Net.HttpStatusCode.OK;
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response.ContentLength = texture.Data.Length;
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if (format == DefaultFormat)
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response.ContentType = texture.Metadata.ContentType;
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else
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response.ContentType = "image/" + format;
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response.Body.Write(texture.Data, 0, texture.Data.Length);
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}
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}
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private bool TryParseRange(string header, out int start, out int end)
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{
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if (header.StartsWith("bytes="))
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{
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string[] rangeValues = header.Substring(6).Split('-');
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if (rangeValues.Length == 2)
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{
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if (Int32.TryParse(rangeValues[0], out start) && Int32.TryParse(rangeValues[1], out end))
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return true;
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}
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}
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start = end = 0;
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return false;
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}
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private byte[] ConvertTextureData(AssetBase texture, string format)
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{
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m_log.DebugFormat("[GETTEXTURE]: Converting texture {0} to {1}", texture.ID, format);
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byte[] data = new byte[0];
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MemoryStream imgstream = new MemoryStream();
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Bitmap mTexture = new Bitmap(1, 1);
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ManagedImage managedImage;
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Image image = (Image)mTexture;
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try
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{
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// Taking our jpeg2000 data, decoding it, then saving it to a byte array with regular data
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imgstream = new MemoryStream();
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// Decode image to System.Drawing.Image
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if (OpenJPEG.DecodeToImage(texture.Data, out managedImage, out image))
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{
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// Save to bitmap
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mTexture = new Bitmap(image);
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EncoderParameters myEncoderParameters = new EncoderParameters();
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myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 95L);
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// Save bitmap to stream
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ImageCodecInfo codec = GetEncoderInfo("image/" + format);
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if (codec != null)
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{
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mTexture.Save(imgstream, codec, myEncoderParameters);
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// Write the stream to a byte array for output
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data = imgstream.ToArray();
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}
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else
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m_log.WarnFormat("[GETTEXTURE]: No such codec {0}", format);
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}
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}
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catch (Exception e)
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{
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m_log.WarnFormat("[GETTEXTURE]: Unable to convert texture {0} to {1}: {2}", texture.ID, format, e.Message);
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}
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finally
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{
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// Reclaim memory, these are unmanaged resources
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// If we encountered an exception, one or more of these will be null
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if (mTexture != null)
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mTexture.Dispose();
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if (image != null)
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image.Dispose();
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if (imgstream != null)
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{
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imgstream.Close();
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imgstream.Dispose();
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}
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}
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return data;
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}
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// From msdn
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private static ImageCodecInfo GetEncoderInfo(String mimeType)
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{
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ImageCodecInfo[] encoders;
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encoders = ImageCodecInfo.GetImageEncoders();
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for (int j = 0; j < encoders.Length; ++j)
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{
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if (encoders[j].MimeType == mimeType)
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return encoders[j];
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}
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return null;
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}
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}
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}
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