diff options
Diffstat (limited to 'OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs')
-rw-r--r-- | OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs | 394 |
1 files changed, 394 insertions, 0 deletions
diff --git a/OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs b/OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs new file mode 100644 index 0000000..0685c5e --- /dev/null +++ b/OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs | |||
@@ -0,0 +1,394 @@ | |||
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.Drawing; | ||
32 | using System.Drawing.Imaging; | ||
33 | using System.Reflection; | ||
34 | using System.IO; | ||
35 | using System.Web; | ||
36 | using log4net; | ||
37 | using Nini.Config; | ||
38 | using OpenMetaverse; | ||
39 | using OpenMetaverse.StructuredData; | ||
40 | using OpenMetaverse.Imaging; | ||
41 | using OpenSim.Framework; | ||
42 | using OpenSim.Framework.Servers; | ||
43 | using OpenSim.Framework.Servers.HttpServer; | ||
44 | using OpenSim.Region.Framework.Interfaces; | ||
45 | using OpenSim.Services.Interfaces; | ||
46 | using Caps = OpenSim.Framework.Capabilities.Caps; | ||
47 | |||
48 | namespace OpenSim.Capabilities.Handlers | ||
49 | { | ||
50 | public class GetTextureRobustHandler : BaseStreamHandler | ||
51 | { | ||
52 | private static readonly ILog m_log = | ||
53 | LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); | ||
54 | private IAssetService m_assetService; | ||
55 | |||
56 | public const string DefaultFormat = "x-j2c"; | ||
57 | |||
58 | // TODO: Change this to a config option | ||
59 | private string m_RedirectURL = null; | ||
60 | |||
61 | public GetTextureRobustHandler(string path, IAssetService assService, string name, string description, string redirectURL) | ||
62 | : base("GET", path, name, description) | ||
63 | { | ||
64 | m_assetService = assService; | ||
65 | m_RedirectURL = redirectURL; | ||
66 | if (m_RedirectURL != null && !m_RedirectURL.EndsWith("/")) | ||
67 | m_RedirectURL += "/"; | ||
68 | } | ||
69 | |||
70 | protected override byte[] ProcessRequest(string path, Stream request, IOSHttpRequest httpRequest, IOSHttpResponse httpResponse) | ||
71 | { | ||
72 | // Try to parse the texture ID from the request URL | ||
73 | NameValueCollection query = HttpUtility.ParseQueryString(httpRequest.Url.Query); | ||
74 | string textureStr = query.GetOne("texture_id"); | ||
75 | string format = query.GetOne("format"); | ||
76 | |||
77 | //m_log.DebugFormat("[GETTEXTURE]: called {0}", textureStr); | ||
78 | |||
79 | if (m_assetService == null) | ||
80 | { | ||
81 | m_log.Error("[GETTEXTURE]: Cannot fetch texture " + textureStr + " without an asset service"); | ||
82 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
83 | return null; | ||
84 | } | ||
85 | |||
86 | UUID textureID; | ||
87 | if (!String.IsNullOrEmpty(textureStr) && UUID.TryParse(textureStr, out textureID)) | ||
88 | { | ||
89 | // m_log.DebugFormat("[GETTEXTURE]: Received request for texture id {0}", textureID); | ||
90 | |||
91 | string[] formats; | ||
92 | if (!string.IsNullOrEmpty(format)) | ||
93 | { | ||
94 | formats = new string[1] { format.ToLower() }; | ||
95 | } | ||
96 | else | ||
97 | { | ||
98 | formats = WebUtil.GetPreferredImageTypes(httpRequest.Headers.Get("Accept")); | ||
99 | if (formats.Length == 0) | ||
100 | formats = new string[1] { DefaultFormat }; // default | ||
101 | |||
102 | } | ||
103 | // OK, we have an array with preferred formats, possibly with only one entry | ||
104 | |||
105 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
106 | foreach (string f in formats) | ||
107 | { | ||
108 | if (FetchTexture(httpRequest, httpResponse, textureID, f)) | ||
109 | break; | ||
110 | } | ||
111 | } | ||
112 | else | ||
113 | { | ||
114 | m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url); | ||
115 | } | ||
116 | |||
117 | // m_log.DebugFormat( | ||
118 | // "[GETTEXTURE]: For texture {0} sending back response {1}, data length {2}", | ||
119 | // textureID, httpResponse.StatusCode, httpResponse.ContentLength); | ||
120 | |||
121 | return null; | ||
122 | } | ||
123 | |||
124 | /// <summary> | ||
125 | /// | ||
126 | /// </summary> | ||
127 | /// <param name="httpRequest"></param> | ||
128 | /// <param name="httpResponse"></param> | ||
129 | /// <param name="textureID"></param> | ||
130 | /// <param name="format"></param> | ||
131 | /// <returns>False for "caller try another codec"; true otherwise</returns> | ||
132 | private bool FetchTexture(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, UUID textureID, string format) | ||
133 | { | ||
134 | // m_log.DebugFormat("[GETTEXTURE]: {0} with requested format {1}", textureID, format); | ||
135 | AssetBase texture; | ||
136 | |||
137 | if(!String.IsNullOrEmpty(m_RedirectURL)) | ||
138 | { | ||
139 | string textureUrl = m_RedirectURL + "?texture_id=" + textureID.ToString(); | ||
140 | m_log.Debug("[GETTEXTURE]: Redirecting texture request to " + textureUrl); | ||
141 | httpResponse.StatusCode = (int)OSHttpStatusCode.RedirectMovedPermanently; | ||
142 | httpResponse.RedirectLocation = textureUrl; | ||
143 | return true; | ||
144 | } | ||
145 | else // no redirect | ||
146 | { | ||
147 | texture = m_assetService.Get(textureID.ToString()); | ||
148 | if(texture != null) | ||
149 | { | ||
150 | if(texture.Type != (sbyte)AssetType.Texture) | ||
151 | { | ||
152 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
153 | return true; | ||
154 | } | ||
155 | if(format == DefaultFormat) | ||
156 | { | ||
157 | WriteTextureData(httpRequest, httpResponse, texture, format); | ||
158 | return true; | ||
159 | } | ||
160 | else | ||
161 | { | ||
162 | AssetBase newTexture = new AssetBase(texture.ID + "-" + format, texture.Name, (sbyte)AssetType.Texture, texture.Metadata.CreatorID); | ||
163 | newTexture.Data = ConvertTextureData(texture, format); | ||
164 | if(newTexture.Data.Length == 0) | ||
165 | return false; // !!! Caller try another codec, please! | ||
166 | |||
167 | newTexture.Flags = AssetFlags.Collectable; | ||
168 | newTexture.Temporary = true; | ||
169 | newTexture.Local = true; | ||
170 | WriteTextureData(httpRequest, httpResponse, newTexture, format); | ||
171 | return true; | ||
172 | } | ||
173 | } | ||
174 | } | ||
175 | |||
176 | // not found | ||
177 | // m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found"); | ||
178 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
179 | return true; | ||
180 | } | ||
181 | |||
182 | private void WriteTextureData(IOSHttpRequest request, IOSHttpResponse response, AssetBase texture, string format) | ||
183 | { | ||
184 | string range = request.Headers.GetOne("Range"); | ||
185 | |||
186 | if (!String.IsNullOrEmpty(range)) // JP2's only | ||
187 | { | ||
188 | // Range request | ||
189 | int start, end; | ||
190 | if (TryParseRange(range, out start, out end)) | ||
191 | { | ||
192 | // Before clamping start make sure we can satisfy it in order to avoid | ||
193 | // sending back the last byte instead of an error status | ||
194 | if (start >= texture.Data.Length) | ||
195 | { | ||
196 | // m_log.DebugFormat( | ||
197 | // "[GETTEXTURE]: Client requested range for texture {0} starting at {1} but texture has end of {2}", | ||
198 | // texture.ID, start, texture.Data.Length); | ||
199 | |||
200 | // Stricly speaking, as per http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html, we should be sending back | ||
201 | // Requested Range Not Satisfiable (416) here. However, it appears that at least recent implementations | ||
202 | // of the Linden Lab viewer (3.2.1 and 3.3.4 and probably earlier), a viewer that has previously | ||
203 | // received a very small texture may attempt to fetch bytes from the server past the | ||
204 | // range of data that it received originally. Whether this happens appears to depend on whether | ||
205 | // the viewer's estimation of how large a request it needs to make for certain discard levels | ||
206 | // (http://wiki.secondlife.com/wiki/Image_System#Discard_Level_and_Mip_Mapping), chiefly discard | ||
207 | // level 2. If this estimate is greater than the total texture size, returning a RequestedRangeNotSatisfiable | ||
208 | // here will cause the viewer to treat the texture as bad and never display the full resolution | ||
209 | // However, if we return PartialContent (or OK) instead, the viewer will display that resolution. | ||
210 | |||
211 | // response.StatusCode = (int)System.Net.HttpStatusCode.RequestedRangeNotSatisfiable; | ||
212 | // response.AddHeader("Content-Range", String.Format("bytes */{0}", texture.Data.Length)); | ||
213 | // response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
214 | response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent; | ||
215 | response.ContentType = texture.Metadata.ContentType; | ||
216 | } | ||
217 | else | ||
218 | { | ||
219 | // Handle the case where no second range value was given. This is equivalent to requesting | ||
220 | // the rest of the entity. | ||
221 | if (end == -1) | ||
222 | end = int.MaxValue; | ||
223 | |||
224 | end = Utils.Clamp(end, 0, texture.Data.Length - 1); | ||
225 | start = Utils.Clamp(start, 0, end); | ||
226 | int len = end - start + 1; | ||
227 | |||
228 | // m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID); | ||
229 | |||
230 | // Always return PartialContent, even if the range covered the entire data length | ||
231 | // We were accidentally sending back 404 before in this situation | ||
232 | // https://issues.apache.org/bugzilla/show_bug.cgi?id=51878 supports sending 206 even if the | ||
233 | // entire range is requested, and viewer 3.2.2 (and very probably earlier) seems fine with this. | ||
234 | // | ||
235 | // We also do not want to send back OK even if the whole range was satisfiable since this causes | ||
236 | // HTTP textures on at least Imprudence 1.4.0-beta2 to never display the final texture quality. | ||
237 | // if (end > maxEnd) | ||
238 | // response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
239 | // else | ||
240 | response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent; | ||
241 | |||
242 | response.ContentLength = len; | ||
243 | response.ContentType = texture.Metadata.ContentType; | ||
244 | response.AddHeader("Content-Range", String.Format("bytes {0}-{1}/{2}", start, end, texture.Data.Length)); | ||
245 | |||
246 | response.Body.Write(texture.Data, start, len); | ||
247 | } | ||
248 | } | ||
249 | else | ||
250 | { | ||
251 | m_log.Warn("[GETTEXTURE]: Malformed Range header: " + range); | ||
252 | response.StatusCode = (int)System.Net.HttpStatusCode.BadRequest; | ||
253 | } | ||
254 | } | ||
255 | else // JP2's or other formats | ||
256 | { | ||
257 | // Full content request | ||
258 | response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
259 | response.ContentLength = texture.Data.Length; | ||
260 | if (format == DefaultFormat) | ||
261 | response.ContentType = texture.Metadata.ContentType; | ||
262 | else | ||
263 | response.ContentType = "image/" + format; | ||
264 | response.Body.Write(texture.Data, 0, texture.Data.Length); | ||
265 | } | ||
266 | |||
267 | // if (response.StatusCode < 200 || response.StatusCode > 299) | ||
268 | // m_log.WarnFormat( | ||
269 | // "[GETTEXTURE]: For texture {0} requested range {1} responded {2} with content length {3} (actual {4})", | ||
270 | // texture.FullID, range, response.StatusCode, response.ContentLength, texture.Data.Length); | ||
271 | // else | ||
272 | // m_log.DebugFormat( | ||
273 | // "[GETTEXTURE]: For texture {0} requested range {1} responded {2} with content length {3} (actual {4})", | ||
274 | // texture.FullID, range, response.StatusCode, response.ContentLength, texture.Data.Length); | ||
275 | } | ||
276 | |||
277 | /// <summary> | ||
278 | /// Parse a range header. | ||
279 | /// </summary> | ||
280 | /// <remarks> | ||
281 | /// As per http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html, | ||
282 | /// this obeys range headers with two values (e.g. 533-4165) and no second value (e.g. 533-). | ||
283 | /// Where there is no value, -1 is returned. | ||
284 | /// FIXME: Need to cover the case where only a second value is specified (e.g. -4165), probably by returning -1 | ||
285 | /// for start.</remarks> | ||
286 | /// <returns></returns> | ||
287 | /// <param name='header'></param> | ||
288 | /// <param name='start'>Start of the range. Undefined if this was not a number.</param> | ||
289 | /// <param name='end'>End of the range. Will be -1 if no end specified. Undefined if there was a raw string but this was not a number.</param> | ||
290 | private bool TryParseRange(string header, out int start, out int end) | ||
291 | { | ||
292 | start = end = 0; | ||
293 | |||
294 | if (header.StartsWith("bytes=")) | ||
295 | { | ||
296 | string[] rangeValues = header.Substring(6).Split('-'); | ||
297 | |||
298 | if (rangeValues.Length == 2) | ||
299 | { | ||
300 | if (!Int32.TryParse(rangeValues[0], out start)) | ||
301 | return false; | ||
302 | |||
303 | string rawEnd = rangeValues[1]; | ||
304 | |||
305 | if (rawEnd == "") | ||
306 | { | ||
307 | end = -1; | ||
308 | return true; | ||
309 | } | ||
310 | else if (Int32.TryParse(rawEnd, out end)) | ||
311 | { | ||
312 | return true; | ||
313 | } | ||
314 | } | ||
315 | } | ||
316 | |||
317 | start = end = 0; | ||
318 | return false; | ||
319 | } | ||
320 | |||
321 | private byte[] ConvertTextureData(AssetBase texture, string format) | ||
322 | { | ||
323 | m_log.DebugFormat("[GETTEXTURE]: Converting texture {0} to {1}", texture.ID, format); | ||
324 | byte[] data = new byte[0]; | ||
325 | |||
326 | MemoryStream imgstream = new MemoryStream(); | ||
327 | Bitmap mTexture = null; | ||
328 | ManagedImage managedImage = null; | ||
329 | Image image = null; | ||
330 | |||
331 | try | ||
332 | { | ||
333 | // Taking our jpeg2000 data, decoding it, then saving it to a byte array with regular data | ||
334 | // Decode image to System.Drawing.Image | ||
335 | if (OpenJPEG.DecodeToImage(texture.Data, out managedImage, out image) && image != null) | ||
336 | { | ||
337 | // Save to bitmap | ||
338 | mTexture = new Bitmap(image); | ||
339 | |||
340 | using(EncoderParameters myEncoderParameters = new EncoderParameters()) | ||
341 | { | ||
342 | myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality,95L); | ||
343 | |||
344 | // Save bitmap to stream | ||
345 | ImageCodecInfo codec = GetEncoderInfo("image/" + format); | ||
346 | if (codec != null) | ||
347 | { | ||
348 | mTexture.Save(imgstream, codec, myEncoderParameters); | ||
349 | // Write the stream to a byte array for output | ||
350 | data = imgstream.ToArray(); | ||
351 | } | ||
352 | else | ||
353 | m_log.WarnFormat("[GETTEXTURE]: No such codec {0}", format); | ||
354 | } | ||
355 | } | ||
356 | } | ||
357 | catch (Exception e) | ||
358 | { | ||
359 | m_log.WarnFormat("[GETTEXTURE]: Unable to convert texture {0} to {1}: {2}", texture.ID, format, e.Message); | ||
360 | } | ||
361 | finally | ||
362 | { | ||
363 | // Reclaim memory, these are unmanaged resources | ||
364 | // If we encountered an exception, one or more of these will be null | ||
365 | if (mTexture != null) | ||
366 | mTexture.Dispose(); | ||
367 | |||
368 | if (image != null) | ||
369 | image.Dispose(); | ||
370 | |||
371 | if(managedImage != null) | ||
372 | managedImage.Clear(); | ||
373 | |||
374 | if (imgstream != null) | ||
375 | imgstream.Dispose(); | ||
376 | } | ||
377 | |||
378 | return data; | ||
379 | } | ||
380 | |||
381 | // From msdn | ||
382 | private static ImageCodecInfo GetEncoderInfo(String mimeType) | ||
383 | { | ||
384 | ImageCodecInfo[] encoders; | ||
385 | encoders = ImageCodecInfo.GetImageEncoders(); | ||
386 | for (int j = 0; j < encoders.Length; ++j) | ||
387 | { | ||
388 | if (encoders[j].MimeType == mimeType) | ||
389 | return encoders[j]; | ||
390 | } | ||
391 | return null; | ||
392 | } | ||
393 | } | ||
394 | } | ||