/*
* 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 OpenSimulator 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;
using System.Collections;
using System.Collections.Specialized;
using System.Reflection;
using System.IO;
using System.Web;
using log4net;
using Nini.Config;
using OpenMetaverse;
using OpenMetaverse.StructuredData;
using OpenSim.Framework;
using OpenSim.Framework.Servers;
using OpenSim.Framework.Servers.HttpServer;
using OpenSim.Services.Interfaces;
using Caps = OpenSim.Framework.Capabilities.Caps;
namespace OpenSim.Capabilities.Handlers
{
public class GetMeshHandler
{
private static readonly ILog m_log =
LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private IAssetService m_assetService;
public const string DefaultFormat = "vnd.ll.mesh";
public GetMeshHandler(IAssetService assService)
{
m_assetService = assService;
}
public Hashtable Handle(Hashtable request)
{
Hashtable ret = new Hashtable();
ret["int_response_code"] = (int)System.Net.HttpStatusCode.NotFound;
ret["content_type"] = "text/plain";
ret["keepalive"] = false;
ret["reusecontext"] = false;
ret["int_bytes"] = 0;
ret["int_lod"] = 0;
string MeshStr = (string)request["mesh_id"];
//m_log.DebugFormat("[GETMESH]: called {0}", MeshStr);
if (m_assetService == null)
{
m_log.Error("[GETMESH]: Cannot fetch mesh " + MeshStr + " without an asset service");
}
UUID meshID;
if (!String.IsNullOrEmpty(MeshStr) && UUID.TryParse(MeshStr, out meshID))
{
// m_log.DebugFormat("[GETMESH]: Received request for mesh id {0}", meshID);
ret = ProcessGetMesh(request, UUID.Zero, null);
}
else
{
m_log.Warn("[GETMESH]: Failed to parse a mesh_id from GetMesh request: " + (string)request["uri"]);
}
return ret;
}
public Hashtable ProcessGetMesh(Hashtable request, UUID AgentId, Caps cap)
{
Hashtable responsedata = new Hashtable();
responsedata["int_response_code"] = 400; //501; //410; //404;
responsedata["content_type"] = "text/plain";
responsedata["keepalive"] = false;
responsedata["str_response_string"] = "Request wasn't what was expected";
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 0;
responsedata["int_bytes"] = 0;
string meshStr = string.Empty;
if (request.ContainsKey("mesh_id"))
meshStr = request["mesh_id"].ToString();
UUID meshID = UUID.Zero;
if (!String.IsNullOrEmpty(meshStr) && UUID.TryParse(meshStr, out meshID))
{
if (m_assetService == null)
{
responsedata["int_response_code"] = 404; //501; //410; //404;
responsedata["content_type"] = "text/plain";
responsedata["keepalive"] = false;
responsedata["str_response_string"] = "The asset service is unavailable. So is your mesh.";
responsedata["reusecontext"] = false;
return responsedata;
}
AssetBase mesh = m_assetService.Get(meshID.ToString());
if (mesh != null)
{
if (mesh.Type == (SByte)AssetType.Mesh)
{
Hashtable headers = new Hashtable();
responsedata["headers"] = headers;
string range = String.Empty;
if (((Hashtable)request["headers"])["range"] != null)
range = (string)((Hashtable)request["headers"])["range"];
else if (((Hashtable)request["headers"])["Range"] != null)
range = (string)((Hashtable)request["headers"])["Range"];
if (!String.IsNullOrEmpty(range)) // Mesh Asset LOD // Physics
{
// Range request
int start, end;
if (TryParseRange(range, out start, out end))
{
// Before clamping start make sure we can satisfy it in order to avoid
// sending back the last byte instead of an error status
if (start >= mesh.Data.Length)
{
responsedata["int_response_code"] = 404; //501; //410; //404;
responsedata["content_type"] = "text/plain";
responsedata["keepalive"] = false;
responsedata["str_response_string"] = "This range doesnt exist.";
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 3;
return responsedata;
}
else
{
end = Utils.Clamp(end, 0, mesh.Data.Length - 1);
start = Utils.Clamp(start, 0, end);
int len = end - start + 1;
//m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID);
if (start > 20000)
{
responsedata["int_lod"] = 3;
}
else if (start < 4097)
{
responsedata["int_lod"] = 1;
}
else
{
responsedata["int_lod"] = 2;
}
if (start == 0 && len == mesh.Data.Length) // well redudante maybe
{
responsedata["int_response_code"] = (int)System.Net.HttpStatusCode.OK;
responsedata["bin_response_data"] = mesh.Data;
responsedata["int_bytes"] = mesh.Data.Length;
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 3;
}
else
{
responsedata["int_response_code"] =
(int)System.Net.HttpStatusCode.PartialContent;
headers["Content-Range"] = String.Format("bytes {0}-{1}/{2}", start, end,
mesh.Data.Length);
byte[] d = new byte[len];
Array.Copy(mesh.Data, start, d, 0, len);
responsedata["bin_response_data"] = d;
responsedata["int_bytes"] = len;
responsedata["reusecontext"] = false;
}
}
}
else
{
m_log.Warn("[GETMESH]: Failed to parse a range from GetMesh request, sending full asset: " + (string)request["uri"]);
responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data);
responsedata["content_type"] = "application/vnd.ll.mesh";
responsedata["int_response_code"] = 200;
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 3;
}
}
else
{
responsedata["str_response_string"] = Convert.ToBase64String(mesh.Data);
responsedata["content_type"] = "application/vnd.ll.mesh";
responsedata["int_response_code"] = 200;
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 3;
}
}
// Optionally add additional mesh types here
else
{
responsedata["int_response_code"] = 404; //501; //410; //404;
responsedata["content_type"] = "text/plain";
responsedata["keepalive"] = false;
responsedata["str_response_string"] = "Unfortunately, this asset isn't a mesh.";
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 1;
return responsedata;
}
}
else
{
responsedata["int_response_code"] = 404; //501; //410; //404;
responsedata["content_type"] = "text/plain";
responsedata["keepalive"] = false;
responsedata["str_response_string"] = "Your Mesh wasn't found. Sorry!";
responsedata["reusecontext"] = false;
responsedata["int_lod"] = 0;
return responsedata;
}
}
return responsedata;
}
private bool TryParseRange(string header, out int start, out int end)
{
if (header.StartsWith("bytes="))
{
string[] rangeValues = header.Substring(6).Split('-');
if (rangeValues.Length == 2)
{
if (Int32.TryParse(rangeValues[0], out start) && Int32.TryParse(rangeValues[1], out end))
return true;
}
}
start = end = 0;
return false;
}
}
}