271 lines
12 KiB
C#
271 lines
12 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.Specialized;
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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 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.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 GetMeshHandler
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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 = "vnd.ll.mesh";
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public GetMeshHandler(IAssetService assService)
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{
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m_assetService = assService;
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}
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public Hashtable Handle(Hashtable request)
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{
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Hashtable ret = new Hashtable();
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ret["int_response_code"] = (int)System.Net.HttpStatusCode.NotFound;
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ret["content_type"] = "text/plain";
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ret["keepalive"] = false;
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ret["reusecontext"] = false;
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ret["int_bytes"] = 0;
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ret["int_lod"] = 0;
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string MeshStr = (string)request["mesh_id"];
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//m_log.DebugFormat("[GETMESH]: called {0}", MeshStr);
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if (m_assetService == null)
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{
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m_log.Error("[GETMESH]: Cannot fetch mesh " + MeshStr + " without an asset service");
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}
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UUID meshID;
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if (!String.IsNullOrEmpty(MeshStr) && UUID.TryParse(MeshStr, out meshID))
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{
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// m_log.DebugFormat("[GETMESH]: Received request for mesh id {0}", meshID);
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ret = ProcessGetMesh(request, UUID.Zero, null);
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}
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else
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{
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m_log.Warn("[GETMESH]: Failed to parse a mesh_id from GetMesh request: " + (string)request["uri"]);
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}
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return ret;
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}
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public Hashtable ProcessGetMesh(Hashtable request, UUID AgentId, Caps cap)
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{
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Hashtable responsedata = new Hashtable();
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responsedata["int_response_code"] = 400; //501; //410; //404;
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responsedata["content_type"] = "text/plain";
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responsedata["keepalive"] = false;
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responsedata["str_response_string"] = "Request wasn't what was expected";
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 0;
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responsedata["int_bytes"] = 0;
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string meshStr = string.Empty;
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if (request.ContainsKey("mesh_id"))
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meshStr = request["mesh_id"].ToString();
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UUID meshID = UUID.Zero;
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if (!String.IsNullOrEmpty(meshStr) && UUID.TryParse(meshStr, out meshID))
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{
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if (m_assetService == null)
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{
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responsedata["int_response_code"] = 404; //501; //410; //404;
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responsedata["content_type"] = "text/plain";
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responsedata["keepalive"] = false;
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responsedata["str_response_string"] = "The asset service is unavailable. So is your mesh.";
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responsedata["reusecontext"] = false;
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return responsedata;
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}
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AssetBase mesh = m_assetService.Get(meshID.ToString());
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if (mesh != null)
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{
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if (mesh.Type == (SByte)AssetType.Mesh)
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{
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Hashtable headers = new Hashtable();
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responsedata["headers"] = headers;
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string range = String.Empty;
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if (((Hashtable)request["headers"])["range"] != null)
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range = (string)((Hashtable)request["headers"])["range"];
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else if (((Hashtable)request["headers"])["Range"] != null)
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range = (string)((Hashtable)request["headers"])["Range"];
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if (!String.IsNullOrEmpty(range)) // Mesh Asset LOD // Physics
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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 >= mesh.Data.Length)
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{
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responsedata["int_response_code"] = 404; //501; //410; //404;
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responsedata["content_type"] = "text/plain";
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responsedata["keepalive"] = false;
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responsedata["str_response_string"] = "This range doesnt exist.";
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 3;
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return responsedata;
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}
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else
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{
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end = Utils.Clamp(end, 0, mesh.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 (start > 20000)
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{
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responsedata["int_lod"] = 3;
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}
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else if (start < 4097)
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{
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responsedata["int_lod"] = 1;
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}
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else
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{
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responsedata["int_lod"] = 2;
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}
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if (start == 0 && len == mesh.Data.Length) // well redudante maybe
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{
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responsedata["int_response_code"] = (int)System.Net.HttpStatusCode.OK;
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responsedata["bin_response_data"] = mesh.Data;
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responsedata["int_bytes"] = mesh.Data.Length;
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 3;
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}
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else
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{
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responsedata["int_response_code"] =
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(int)System.Net.HttpStatusCode.PartialContent;
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headers["Content-Range"] = String.Format("bytes {0}-{1}/{2}", start, end,
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mesh.Data.Length);
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byte[] d = new byte[len];
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Array.Copy(mesh.Data, start, d, 0, len);
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responsedata["bin_response_data"] = d;
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responsedata["int_bytes"] = len;
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responsedata["reusecontext"] = false;
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}
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}
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}
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else
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{
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m_log.Warn("[GETMESH]: Failed to parse a range from GetMesh request, sending full asset: " + (string)request["uri"]);
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responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data);
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responsedata["content_type"] = "application/vnd.ll.mesh";
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responsedata["int_response_code"] = 200;
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 3;
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}
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}
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else
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{
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responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data);
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responsedata["content_type"] = "application/vnd.ll.mesh";
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responsedata["int_response_code"] = 200;
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 3;
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}
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}
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// Optionally add additional mesh types here
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else
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{
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responsedata["int_response_code"] = 404; //501; //410; //404;
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responsedata["content_type"] = "text/plain";
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responsedata["keepalive"] = false;
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responsedata["str_response_string"] = "Unfortunately, this asset isn't a mesh.";
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 1;
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return responsedata;
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}
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}
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else
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{
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responsedata["int_response_code"] = 404; //501; //410; //404;
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responsedata["content_type"] = "text/plain";
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responsedata["keepalive"] = false;
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responsedata["str_response_string"] = "Your Mesh wasn't found. Sorry!";
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responsedata["reusecontext"] = false;
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responsedata["int_lod"] = 0;
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return responsedata;
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}
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}
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return responsedata;
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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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}
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} |