diff options
Diffstat (limited to 'OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs')
-rw-r--r-- | OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs | 431 |
1 files changed, 431 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..f813471 --- /dev/null +++ b/OpenSim/Capabilities/Handlers/GetTexture/GetTextureRobustHandler.cs | |||
@@ -0,0 +1,431 @@ | |||
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 | } | ||
84 | |||
85 | UUID textureID; | ||
86 | if (!String.IsNullOrEmpty(textureStr) && UUID.TryParse(textureStr, out textureID)) | ||
87 | { | ||
88 | // m_log.DebugFormat("[GETTEXTURE]: Received request for texture id {0}", textureID); | ||
89 | |||
90 | string[] formats; | ||
91 | if (!string.IsNullOrEmpty(format)) | ||
92 | { | ||
93 | formats = new string[1] { format.ToLower() }; | ||
94 | } | ||
95 | else | ||
96 | { | ||
97 | formats = WebUtil.GetPreferredImageTypes(httpRequest.Headers.Get("Accept")); | ||
98 | if (formats.Length == 0) | ||
99 | formats = new string[1] { DefaultFormat }; // default | ||
100 | |||
101 | } | ||
102 | // OK, we have an array with preferred formats, possibly with only one entry | ||
103 | |||
104 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
105 | foreach (string f in formats) | ||
106 | { | ||
107 | if (FetchTexture(httpRequest, httpResponse, textureID, f)) | ||
108 | break; | ||
109 | } | ||
110 | } | ||
111 | else | ||
112 | { | ||
113 | m_log.Warn("[GETTEXTURE]: Failed to parse a texture_id from GetTexture request: " + httpRequest.Url); | ||
114 | } | ||
115 | |||
116 | // m_log.DebugFormat( | ||
117 | // "[GETTEXTURE]: For texture {0} sending back response {1}, data length {2}", | ||
118 | // textureID, httpResponse.StatusCode, httpResponse.ContentLength); | ||
119 | |||
120 | return null; | ||
121 | } | ||
122 | |||
123 | /// <summary> | ||
124 | /// | ||
125 | /// </summary> | ||
126 | /// <param name="httpRequest"></param> | ||
127 | /// <param name="httpResponse"></param> | ||
128 | /// <param name="textureID"></param> | ||
129 | /// <param name="format"></param> | ||
130 | /// <returns>False for "caller try another codec"; true otherwise</returns> | ||
131 | private bool FetchTexture(IOSHttpRequest httpRequest, IOSHttpResponse httpResponse, UUID textureID, string format) | ||
132 | { | ||
133 | // m_log.DebugFormat("[GETTEXTURE]: {0} with requested format {1}", textureID, format); | ||
134 | AssetBase texture; | ||
135 | |||
136 | string fullID = textureID.ToString(); | ||
137 | if (format != DefaultFormat) | ||
138 | fullID = fullID + "-" + format; | ||
139 | |||
140 | if (!String.IsNullOrEmpty(m_RedirectURL)) | ||
141 | { | ||
142 | // Only try to fetch locally cached textures. Misses are redirected | ||
143 | texture = m_assetService.GetCached(fullID); | ||
144 | |||
145 | if (texture != null) | ||
146 | { | ||
147 | if (texture.Type != (sbyte)AssetType.Texture) | ||
148 | { | ||
149 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
150 | return true; | ||
151 | } | ||
152 | WriteTextureData(httpRequest, httpResponse, texture, format); | ||
153 | } | ||
154 | else | ||
155 | { | ||
156 | string textureUrl = m_RedirectURL + "?texture_id="+ textureID.ToString(); | ||
157 | m_log.Debug("[GETTEXTURE]: Redirecting texture request to " + textureUrl); | ||
158 | httpResponse.StatusCode = (int)OSHttpStatusCode.RedirectMovedPermanently; | ||
159 | httpResponse.RedirectLocation = textureUrl; | ||
160 | return true; | ||
161 | } | ||
162 | } | ||
163 | else // no redirect | ||
164 | { | ||
165 | // try the cache | ||
166 | texture = m_assetService.GetCached(fullID); | ||
167 | |||
168 | if (texture == null) | ||
169 | { | ||
170 | // m_log.DebugFormat("[GETTEXTURE]: texture was not in the cache"); | ||
171 | |||
172 | // Fetch locally or remotely. Misses return a 404 | ||
173 | texture = m_assetService.Get(textureID.ToString()); | ||
174 | |||
175 | if (texture != null) | ||
176 | { | ||
177 | if (texture.Type != (sbyte)AssetType.Texture) | ||
178 | { | ||
179 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
180 | return true; | ||
181 | } | ||
182 | if (format == DefaultFormat) | ||
183 | { | ||
184 | WriteTextureData(httpRequest, httpResponse, texture, format); | ||
185 | return true; | ||
186 | } | ||
187 | else | ||
188 | { | ||
189 | AssetBase newTexture = new AssetBase(texture.ID + "-" + format, texture.Name, (sbyte)AssetType.Texture, texture.Metadata.CreatorID); | ||
190 | newTexture.Data = ConvertTextureData(texture, format); | ||
191 | if (newTexture.Data.Length == 0) | ||
192 | return false; // !!! Caller try another codec, please! | ||
193 | |||
194 | newTexture.Flags = AssetFlags.Collectable; | ||
195 | newTexture.Temporary = true; | ||
196 | newTexture.Local = true; | ||
197 | m_assetService.Store(newTexture); | ||
198 | WriteTextureData(httpRequest, httpResponse, newTexture, format); | ||
199 | return true; | ||
200 | } | ||
201 | } | ||
202 | } | ||
203 | else // it was on the cache | ||
204 | { | ||
205 | // m_log.DebugFormat("[GETTEXTURE]: texture was in the cache"); | ||
206 | WriteTextureData(httpRequest, httpResponse, texture, format); | ||
207 | return true; | ||
208 | } | ||
209 | } | ||
210 | |||
211 | // not found | ||
212 | // m_log.Warn("[GETTEXTURE]: Texture " + textureID + " not found"); | ||
213 | httpResponse.StatusCode = (int)System.Net.HttpStatusCode.NotFound; | ||
214 | return true; | ||
215 | } | ||
216 | |||
217 | private void WriteTextureData(IOSHttpRequest request, IOSHttpResponse response, AssetBase texture, string format) | ||
218 | { | ||
219 | string range = request.Headers.GetOne("Range"); | ||
220 | |||
221 | if (!String.IsNullOrEmpty(range)) // JP2's only | ||
222 | { | ||
223 | // Range request | ||
224 | int start, end; | ||
225 | if (TryParseRange(range, out start, out end)) | ||
226 | { | ||
227 | // Before clamping start make sure we can satisfy it in order to avoid | ||
228 | // sending back the last byte instead of an error status | ||
229 | if (start >= texture.Data.Length) | ||
230 | { | ||
231 | // m_log.DebugFormat( | ||
232 | // "[GETTEXTURE]: Client requested range for texture {0} starting at {1} but texture has end of {2}", | ||
233 | // texture.ID, start, texture.Data.Length); | ||
234 | |||
235 | // Stricly speaking, as per http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html, we should be sending back | ||
236 | // Requested Range Not Satisfiable (416) here. However, it appears that at least recent implementations | ||
237 | // of the Linden Lab viewer (3.2.1 and 3.3.4 and probably earlier), a viewer that has previously | ||
238 | // received a very small texture may attempt to fetch bytes from the server past the | ||
239 | // range of data that it received originally. Whether this happens appears to depend on whether | ||
240 | // the viewer's estimation of how large a request it needs to make for certain discard levels | ||
241 | // (http://wiki.secondlife.com/wiki/Image_System#Discard_Level_and_Mip_Mapping), chiefly discard | ||
242 | // level 2. If this estimate is greater than the total texture size, returning a RequestedRangeNotSatisfiable | ||
243 | // here will cause the viewer to treat the texture as bad and never display the full resolution | ||
244 | // However, if we return PartialContent (or OK) instead, the viewer will display that resolution. | ||
245 | |||
246 | // response.StatusCode = (int)System.Net.HttpStatusCode.RequestedRangeNotSatisfiable; | ||
247 | // response.AddHeader("Content-Range", String.Format("bytes */{0}", texture.Data.Length)); | ||
248 | // response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
249 | response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent; | ||
250 | response.ContentType = texture.Metadata.ContentType; | ||
251 | } | ||
252 | else | ||
253 | { | ||
254 | // Handle the case where no second range value was given. This is equivalent to requesting | ||
255 | // the rest of the entity. | ||
256 | if (end == -1) | ||
257 | end = int.MaxValue; | ||
258 | |||
259 | end = Utils.Clamp(end, 0, texture.Data.Length - 1); | ||
260 | start = Utils.Clamp(start, 0, end); | ||
261 | int len = end - start + 1; | ||
262 | |||
263 | // m_log.Debug("Serving " + start + " to " + end + " of " + texture.Data.Length + " bytes for texture " + texture.ID); | ||
264 | |||
265 | // Always return PartialContent, even if the range covered the entire data length | ||
266 | // We were accidentally sending back 404 before in this situation | ||
267 | // https://issues.apache.org/bugzilla/show_bug.cgi?id=51878 supports sending 206 even if the | ||
268 | // entire range is requested, and viewer 3.2.2 (and very probably earlier) seems fine with this. | ||
269 | // | ||
270 | // We also do not want to send back OK even if the whole range was satisfiable since this causes | ||
271 | // HTTP textures on at least Imprudence 1.4.0-beta2 to never display the final texture quality. | ||
272 | // if (end > maxEnd) | ||
273 | // response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
274 | // else | ||
275 | response.StatusCode = (int)System.Net.HttpStatusCode.PartialContent; | ||
276 | |||
277 | response.ContentLength = len; | ||
278 | response.ContentType = texture.Metadata.ContentType; | ||
279 | response.AddHeader("Content-Range", String.Format("bytes {0}-{1}/{2}", start, end, texture.Data.Length)); | ||
280 | |||
281 | response.Body.Write(texture.Data, start, len); | ||
282 | } | ||
283 | } | ||
284 | else | ||
285 | { | ||
286 | m_log.Warn("[GETTEXTURE]: Malformed Range header: " + range); | ||
287 | response.StatusCode = (int)System.Net.HttpStatusCode.BadRequest; | ||
288 | } | ||
289 | } | ||
290 | else // JP2's or other formats | ||
291 | { | ||
292 | // Full content request | ||
293 | response.StatusCode = (int)System.Net.HttpStatusCode.OK; | ||
294 | response.ContentLength = texture.Data.Length; | ||
295 | if (format == DefaultFormat) | ||
296 | response.ContentType = texture.Metadata.ContentType; | ||
297 | else | ||
298 | response.ContentType = "image/" + format; | ||
299 | response.Body.Write(texture.Data, 0, texture.Data.Length); | ||
300 | } | ||
301 | |||
302 | // if (response.StatusCode < 200 || response.StatusCode > 299) | ||
303 | // m_log.WarnFormat( | ||
304 | // "[GETTEXTURE]: For texture {0} requested range {1} responded {2} with content length {3} (actual {4})", | ||
305 | // texture.FullID, range, response.StatusCode, response.ContentLength, texture.Data.Length); | ||
306 | // else | ||
307 | // m_log.DebugFormat( | ||
308 | // "[GETTEXTURE]: For texture {0} requested range {1} responded {2} with content length {3} (actual {4})", | ||
309 | // texture.FullID, range, response.StatusCode, response.ContentLength, texture.Data.Length); | ||
310 | } | ||
311 | |||
312 | /// <summary> | ||
313 | /// Parse a range header. | ||
314 | /// </summary> | ||
315 | /// <remarks> | ||
316 | /// As per http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html, | ||
317 | /// this obeys range headers with two values (e.g. 533-4165) and no second value (e.g. 533-). | ||
318 | /// Where there is no value, -1 is returned. | ||
319 | /// FIXME: Need to cover the case where only a second value is specified (e.g. -4165), probably by returning -1 | ||
320 | /// for start.</remarks> | ||
321 | /// <returns></returns> | ||
322 | /// <param name='header'></param> | ||
323 | /// <param name='start'>Start of the range. Undefined if this was not a number.</param> | ||
324 | /// <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> | ||
325 | private bool TryParseRange(string header, out int start, out int end) | ||
326 | { | ||
327 | start = end = 0; | ||
328 | |||
329 | if (header.StartsWith("bytes=")) | ||
330 | { | ||
331 | string[] rangeValues = header.Substring(6).Split('-'); | ||
332 | |||
333 | if (rangeValues.Length == 2) | ||
334 | { | ||
335 | if (!Int32.TryParse(rangeValues[0], out start)) | ||
336 | return false; | ||
337 | |||
338 | string rawEnd = rangeValues[1]; | ||
339 | |||
340 | if (rawEnd == "") | ||
341 | { | ||
342 | end = -1; | ||
343 | return true; | ||
344 | } | ||
345 | else if (Int32.TryParse(rawEnd, out end)) | ||
346 | { | ||
347 | return true; | ||
348 | } | ||
349 | } | ||
350 | } | ||
351 | |||
352 | start = end = 0; | ||
353 | return false; | ||
354 | } | ||
355 | |||
356 | private byte[] ConvertTextureData(AssetBase texture, string format) | ||
357 | { | ||
358 | m_log.DebugFormat("[GETTEXTURE]: Converting texture {0} to {1}", texture.ID, format); | ||
359 | byte[] data = new byte[0]; | ||
360 | |||
361 | MemoryStream imgstream = new MemoryStream(); | ||
362 | Bitmap mTexture = new Bitmap(1, 1); | ||
363 | ManagedImage managedImage; | ||
364 | Image image = (Image)mTexture; | ||
365 | |||
366 | try | ||
367 | { | ||
368 | // Taking our jpeg2000 data, decoding it, then saving it to a byte array with regular data | ||
369 | |||
370 | imgstream = new MemoryStream(); | ||
371 | |||
372 | // Decode image to System.Drawing.Image | ||
373 | if (OpenJPEG.DecodeToImage(texture.Data, out managedImage, out image)) | ||
374 | { | ||
375 | // Save to bitmap | ||
376 | mTexture = new Bitmap(image); | ||
377 | |||
378 | EncoderParameters myEncoderParameters = new EncoderParameters(); | ||
379 | myEncoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 95L); | ||
380 | |||
381 | // Save bitmap to stream | ||
382 | ImageCodecInfo codec = GetEncoderInfo("image/" + format); | ||
383 | if (codec != null) | ||
384 | { | ||
385 | mTexture.Save(imgstream, codec, myEncoderParameters); | ||
386 | // Write the stream to a byte array for output | ||
387 | data = imgstream.ToArray(); | ||
388 | } | ||
389 | else | ||
390 | m_log.WarnFormat("[GETTEXTURE]: No such codec {0}", format); | ||
391 | |||
392 | } | ||
393 | } | ||
394 | catch (Exception e) | ||
395 | { | ||
396 | m_log.WarnFormat("[GETTEXTURE]: Unable to convert texture {0} to {1}: {2}", texture.ID, format, e.Message); | ||
397 | } | ||
398 | finally | ||
399 | { | ||
400 | // Reclaim memory, these are unmanaged resources | ||
401 | // If we encountered an exception, one or more of these will be null | ||
402 | if (mTexture != null) | ||
403 | mTexture.Dispose(); | ||
404 | |||
405 | if (image != null) | ||
406 | image.Dispose(); | ||
407 | |||
408 | if (imgstream != null) | ||
409 | { | ||
410 | imgstream.Close(); | ||
411 | imgstream.Dispose(); | ||
412 | } | ||
413 | } | ||
414 | |||
415 | return data; | ||
416 | } | ||
417 | |||
418 | // From msdn | ||
419 | private static ImageCodecInfo GetEncoderInfo(String mimeType) | ||
420 | { | ||
421 | ImageCodecInfo[] encoders; | ||
422 | encoders = ImageCodecInfo.GetImageEncoders(); | ||
423 | for (int j = 0; j < encoders.Length; ++j) | ||
424 | { | ||
425 | if (encoders[j].MimeType == mimeType) | ||
426 | return encoders[j]; | ||
427 | } | ||
428 | return null; | ||
429 | } | ||
430 | } | ||
431 | } | ||