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author | John Hurliman | 2010-04-08 12:31:44 -0700 |
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committer | John Hurliman | 2010-04-08 12:31:44 -0700 |
commit | 3f6c4c150e3910e79ee3dc94f9304c16265512c0 (patch) | |
tree | ca83d44c56ab70535dfe04f068f5d0bfd1abb7da /OpenSim/Region/CoreModules/Avatar/Assets | |
parent | * Fixing incorrect documentation for the continuation passing style IAssetSer... (diff) | |
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* Adds IAssetService.GetCached() to allow asset fetching from the local cache only
* Adds GetTextureModule that implements the "GetTexture" capability, aka HTTP texture fetching. This is a significantly optimized path that does not require any server-side JPEG2000 decoding, texture priority queue, or UDP file transfer
* Sanity check for null reference in LLClientView.RefreshGroupMembership()
Diffstat (limited to 'OpenSim/Region/CoreModules/Avatar/Assets')
-rw-r--r-- | OpenSim/Region/CoreModules/Avatar/Assets/GetTextureModule.cs | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/OpenSim/Region/CoreModules/Avatar/Assets/GetTextureModule.cs b/OpenSim/Region/CoreModules/Avatar/Assets/GetTextureModule.cs new file mode 100644 index 0000000..53d2cef --- /dev/null +++ b/OpenSim/Region/CoreModules/Avatar/Assets/GetTextureModule.cs | |||
@@ -0,0 +1,220 @@ | |||
1 | /* | ||
2 | * Copyright (c) Contributors, http://opensimulator.org/ | ||
3 | * See CONTRIBUTORS.TXT for a full list of copyright holders. | ||
4 | * | ||
5 | * Redistribution and use in source and binary forms, with or without | ||
6 | * modification, are permitted provided that the following conditions are met: | ||
7 | * * Redistributions of source code must retain the above copyright | ||
8 | * notice, this list of conditions and the following disclaimer. | ||
9 | * * Redistributions in binary form must reproduce the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer in the | ||
11 | * documentation and/or other materials provided with the distribution. | ||
12 | * * Neither the name of the OpenSimulator Project nor the | ||
13 | * names of its contributors may be used to endorse or promote products | ||
14 | * derived from this software without specific prior written permission. | ||
15 | * | ||
16 | * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY | ||
17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
19 | * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY | ||
20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | ||
23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
26 | */ | ||
27 | |||
28 | using System; | ||
29 | using System.Collections; | ||
30 | using System.Collections.Specialized; | ||
31 | using System.Reflection; | ||
32 | using System.IO; | ||
33 | using System.Web; | ||
34 | using log4net; | ||
35 | using Nini.Config; | ||
36 | using OpenMetaverse; | ||
37 | using OpenMetaverse.StructuredData; | ||
38 | using OpenSim.Framework; | ||
39 | using OpenSim.Framework.Servers; | ||
40 | using OpenSim.Framework.Servers.HttpServer; | ||
41 | using OpenSim.Region.Framework.Interfaces; | ||
42 | using OpenSim.Region.Framework.Scenes; | ||
43 | using OpenSim.Services.Interfaces; | ||
44 | using Caps = OpenSim.Framework.Capabilities.Caps; | ||
45 | |||
46 | namespace OpenSim.Region.CoreModules.Avatar.ObjectCaps | ||
47 | { | ||
48 | #region Stream Handler | ||
49 | |||
50 | public delegate byte[] StreamHandlerCallback(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse); | ||
51 | |||
52 | public class StreamHandler : BaseStreamHandler | ||
53 | { | ||
54 | StreamHandlerCallback m_callback; | ||
55 | |||
56 | public StreamHandler(string httpMethod, string path, StreamHandlerCallback callback) | ||
57 | : base(httpMethod, path) | ||
58 | { | ||
59 | m_callback = callback; | ||
60 | } | ||
61 | |||
62 | public override byte[] Handle(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse) | ||
63 | { | ||
64 | return m_callback(path, request, httpRequest, httpResponse); | ||
65 | } | ||
66 | } | ||
67 | |||
68 | #endregion Stream Handler | ||
69 | |||
70 | public class GetTextureModule : IRegionModule | ||
71 | { | ||
72 | private static readonly ILog m_log = | ||
73 | LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); | ||
74 | private Scene m_scene; | ||
75 | private IAssetService m_assetService; | ||
76 | |||
77 | #region IRegionModule Members | ||
78 | |||
79 | public void Initialise(Scene pScene, IConfigSource pSource) | ||
80 | { | ||
81 | m_scene = pScene; | ||
82 | } | ||
83 | |||
84 | public void PostInitialise() | ||
85 | { | ||
86 | m_assetService = m_scene.RequestModuleInterface<IAssetService>(); | ||
87 | m_scene.EventManager.OnRegisterCaps += RegisterCaps; | ||
88 | } | ||
89 | |||
90 | public void Close() { } | ||
91 | |||
92 | public string Name { get { return "GetTextureModule"; } } | ||
93 | public bool IsSharedModule { get { return false; } } | ||
94 | |||
95 | public void RegisterCaps(UUID agentID, Caps caps) | ||
96 | { | ||
97 | UUID capID = UUID.Random(); | ||
98 | |||
99 | m_log.Info("[GETTEXTURE]: /CAPS/" + capID); | ||
100 | caps.RegisterHandler("GetTexture", new StreamHandler("GET", "/CAPS/" + capID, ProcessGetTexture)); | ||
101 | } | ||
102 | |||
103 | #endregion | ||
104 | |||
105 | private byte[] ProcessGetTexture(string path, Stream request, OSHttpRequest httpRequest, OSHttpResponse httpResponse) | ||
106 | { | ||
107 | // TODO: Change this to a config option | ||
108 | const string REDIRECT_URL = null; | ||
109 | |||
110 | // Try to parse the texture ID from the request URL | ||
111 | NameValueCollection query = HttpUtility.ParseQueryString(httpRequest.Url.Query); | ||
112 | string textureStr = query.GetOne("texture_id"); | ||
113 | |||
114 | if (m_assetService == null) | ||
115 | { | ||
116 | m_log.Error("[GETTEXTURE]: Cannot fetch texture " + textureStr + " without an asset service"); | ||
117 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
118 | return null; | ||
119 | } | ||
120 | |||
121 | UUID textureID; | ||
122 | if (!String.IsNullOrEmpty(textureStr) && UUID.TryParse(textureStr, out textureID)) | ||
123 | { | ||
124 | AssetBase texture; | ||
125 | |||
126 | if (!String.IsNullOrEmpty(REDIRECT_URL)) | ||
127 | { | ||
128 | // Only try to fetch locally cached textures. Misses are redirected | ||
129 | texture = m_assetService.GetCached(textureID.ToString()); | ||
130 | |||
131 | if (texture != null) | ||
132 | { | ||
133 | SendTexture(httpRequest, httpResponse, texture); | ||
134 | } | ||
135 | else | ||
136 | { | ||
137 | string textureUrl = REDIRECT_URL + textureID.ToString(); | ||
138 | m_log.Debug("[GETTEXTURE]: Redirecting texture request to " + textureUrl); | ||
139 | httpResponse.RedirectLocation = textureUrl; | ||
140 | } | ||
141 | } | ||
142 | else | ||
143 | { | ||
144 | // Fetch locally or remotely. Misses return a 404 | ||
145 | texture = m_assetService.Get(textureID.ToString()); | ||
146 | |||
147 | if (texture != null) | ||
148 | { | ||
149 | SendTexture(httpRequest, httpResponse, texture); | ||
150 | } | ||
151 | else | ||
152 | { | ||
153 | m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found"); | ||
154 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
155 | } | ||
156 | } | ||
157 | } | ||
158 | else | ||
159 | { | ||
160 | m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url); | ||
161 | } | ||
162 | |||
163 | httpResponse.Send(); | ||
164 | return null; | ||
165 | } | ||
166 | |||
167 | private void SendTexture(OSHttpRequest request, OSHttpResponse response, AssetBase texture) | ||
168 | { | ||
169 | string range = request.Headers.GetOne("Range"); | ||
170 | if (!String.IsNullOrEmpty(range)) | ||
171 | { | ||
172 | // Range request | ||
173 | int start, end; | ||
174 | if (TryParseRange(range, out start, out end)) | ||
175 | { | ||
176 | end = Utils.Clamp(end, 1, texture.Data.Length); | ||
177 | start = Utils.Clamp(start, 0, end - 1); | ||
178 | |||
179 | m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID); | ||
180 | |||
181 | if (end - start < texture.Data.Length) | ||
182 | response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent; | ||
183 | |||
184 | response.ContentLength = end - start; | ||
185 | response.ContentType = texture.Metadata.ContentType; | ||
186 | |||
187 | response.Body.Write(texture.Data, start, end - start); | ||
188 | } | ||
189 | else | ||
190 | { | ||
191 | m_log.Warn("Malformed Range header: " + range); | ||
192 | response.StatusCode = (int)System.Net.HttpStatusCode.BadRequest; | ||
193 | } | ||
194 | } | ||
195 | else | ||
196 | { | ||
197 | // Full content request | ||
198 | response.ContentLength = texture.Data.Length; | ||
199 | response.ContentType = texture.Metadata.ContentType; | ||
200 | response.Body.Write(texture.Data, 0, texture.Data.Length); | ||
201 | } | ||
202 | } | ||
203 | |||
204 | private bool TryParseRange(string header, out int start, out int end) | ||
205 | { | ||
206 | if (header.StartsWith("bytes=")) | ||
207 | { | ||
208 | string[] rangeValues = header.Substring(6).Split('-'); | ||
209 | if (rangeValues.Length == 2) | ||
210 | { | ||
211 | if (Int32.TryParse(rangeValues[0], out start) && Int32.TryParse(rangeValues[1], out end)) | ||
212 | return true; | ||
213 | } | ||
214 | } | ||
215 | |||
216 | start = end = 0; | ||
217 | return false; | ||
218 | } | ||
219 | } | ||
220 | } | ||