aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Services/Connectors/SimianGrid/SimianAssetServiceConnector.cs
blob: 34bb8b38c858d9c384c49e3a6fc233ba0b819b30 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
/*
 * 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.Generic;
using System.IO;
using System.Net;
using System.Reflection;
using log4net;
using Mono.Addins;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Services.Interfaces;
using OpenMetaverse;
using OpenMetaverse.StructuredData;

namespace OpenSim.Services.Connectors.SimianGrid
{
    /// <summary>
    /// Connects to the SimianGrid asset service
    /// </summary>
    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule")]
    public class SimianAssetServiceConnector : IAssetService, ISharedRegionModule
    {
        private static readonly ILog m_log =
                LogManager.GetLogger(
                MethodBase.GetCurrentMethod().DeclaringType);
        private static string ZeroID = UUID.Zero.ToString();

        private string m_serverUrl = String.Empty;
        private IImprovedAssetCache m_cache;

        #region ISharedRegionModule

        public Type ReplaceableInterface { get { return null; } }
        public void RegionLoaded(Scene scene)
        {
            if (m_cache == null)
            {
                IImprovedAssetCache cache = scene.RequestModuleInterface<IImprovedAssetCache>();
                if (cache is ISharedRegionModule)
                    m_cache = cache;
            }
        }
        public void PostInitialise() { }
        public void Close() { }

        public SimianAssetServiceConnector() { }
        public string Name { get { return "SimianAssetServiceConnector"; } }
        public void AddRegion(Scene scene) { if (!String.IsNullOrEmpty(m_serverUrl)) { scene.RegisterModuleInterface<IAssetService>(this); } }
        public void RemoveRegion(Scene scene) { if (!String.IsNullOrEmpty(m_serverUrl)) { scene.UnregisterModuleInterface<IAssetService>(this); } }
        
        #endregion ISharedRegionModule

        public SimianAssetServiceConnector(IConfigSource source)
        {
            Initialise(source);
        }

        public void Initialise(IConfigSource source)
        {
            if (Simian.IsSimianEnabled(source, "AssetServices", this.Name))
            {
                IConfig gridConfig = source.Configs["AssetService"];
                if (gridConfig == null)
                {
                    m_log.Error("[SIMIAN ASSET CONNECTOR]: AssetService missing from OpenSim.ini");
                    throw new Exception("Asset connector init error");
                }

                string serviceUrl = gridConfig.GetString("AssetServerURI");
                if (String.IsNullOrEmpty(serviceUrl))
                {
                    m_log.Error("[SIMIAN ASSET CONNECTOR]: No AssetServerURI in section AssetService");
                    throw new Exception("Asset connector init error");
                }

                if (!serviceUrl.EndsWith("/") && !serviceUrl.EndsWith("="))
                    serviceUrl = serviceUrl + '/';

                m_serverUrl = serviceUrl;
            }
        }

        #region IAssetService

        public AssetBase Get(string id)
        {
            // Cache fetch
            if (m_cache != null)
            {
                AssetBase asset = m_cache.Get(id);
                if (asset != null)
                    return asset;
            }

            return GetRemote(id);
        }

        public AssetBase GetCached(string id)
        {
            if (m_cache != null)
                return m_cache.Get(id);

            return null;
        }

        /// <summary>
        /// Get an asset's metadata
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public AssetMetadata GetMetadata(string id)
        {
            AssetMetadata metadata = null;

            // Cache fetch
            if (m_cache != null)
            {
                AssetBase asset = m_cache.Get(id);
                if (asset != null)
                    return asset.Metadata;
            }

            Uri url;

            // Determine if id is an absolute URL or a grid-relative UUID
            if (!Uri.TryCreate(id, UriKind.Absolute, out url))
                url = new Uri(m_serverUrl + id);

            try
            {
                HttpWebRequest request = UntrustedHttpWebRequest.Create(url);
                request.Method = "HEAD";

                using (WebResponse response = request.GetResponse())
                {
                    using (Stream responseStream = response.GetResponseStream())
                    {
                        // Create the metadata object
                        metadata = new AssetMetadata();
                        metadata.ContentType = response.ContentType;
                        metadata.ID = id;

                        UUID uuid;
                        if (UUID.TryParse(id, out uuid))
                            metadata.FullID = uuid;

                        string lastModifiedStr = response.Headers.Get("Last-Modified");
                        if (!String.IsNullOrEmpty(lastModifiedStr))
                        {
                            DateTime lastModified;
                            if (DateTime.TryParse(lastModifiedStr, out lastModified))
                                metadata.CreationDate = lastModified;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                m_log.Warn("[SIMIAN ASSET CONNECTOR]: Asset GET from " + url + " failed: " + ex.Message);
            }

            return metadata;
        }

        public byte[] GetData(string id)
        {
            AssetBase asset = Get(id);

            if (asset != null)
                return asset.Data;

            return null;
        }

        /// <summary>
        /// Get an asset asynchronously
        /// </summary>
        /// <param name="id">The asset id</param>
        /// <param name="sender">Represents the requester.  Passed back via the handler</param>
        /// <param name="handler">The handler to call back once the asset has been retrieved</param>
        /// <returns>True if the id was parseable, false otherwise</returns>
        public bool Get(string id, Object sender, AssetRetrieved handler)
        {
            // Cache fetch
            if (m_cache != null)
            {
                AssetBase asset = m_cache.Get(id);
                if (asset != null)
                {
                    handler(id, sender, asset);
                    return true;
                }
            }

            Util.FireAndForget(
                delegate(object o)
                {
                    AssetBase asset = GetRemote(id);
                    handler(id, sender, asset);
                }
            );

            return true;
        }

        /// <summary>
        /// Creates a new asset
        /// </summary>
        /// Returns a random ID if none is passed into it
        /// <param name="asset"></param>
        /// <returns></returns>
        public string Store(AssetBase asset)
        {
            bool storedInCache = false;
            string errorMessage = null;

            // AssetID handling
            if (String.IsNullOrEmpty(asset.ID) || asset.ID == ZeroID)
            {
                asset.FullID = UUID.Random();
                asset.ID = asset.FullID.ToString();
            }

            // Cache handling
            if (m_cache != null)
            {
                m_cache.Cache(asset);
                storedInCache = true;
            }

            // Local asset handling
            if (asset.Local)
            {
                if (!storedInCache)
                {
                    m_log.Error("Cannot store local " + asset.Metadata.ContentType + " asset without an asset cache");
                    asset.ID = null;
                    asset.FullID = UUID.Zero;
                }

                return asset.ID;
            }

            // Distinguish public and private assets
            bool isPublic = true;
            switch ((AssetType)asset.Type)
            {
                case AssetType.CallingCard:
                case AssetType.Gesture:
                case AssetType.LSLBytecode:
                case AssetType.LSLText:
                    isPublic = false;
                    break;
            }

            // Make sure ContentType is set
            if (String.IsNullOrEmpty(asset.Metadata.ContentType))
                asset.Metadata.ContentType = SLUtil.SLAssetTypeToContentType(asset.Type);

            // Build the remote storage request
            List<MultipartForm.Element> postParameters = new List<MultipartForm.Element>()
            {
                new MultipartForm.Parameter("AssetID", asset.FullID.ToString()),
                new MultipartForm.Parameter("CreatorID", asset.Metadata.CreatorID),
                new MultipartForm.Parameter("Temporary", asset.Temporary ? "1" : "0"),
                new MultipartForm.Parameter("Public", isPublic ? "1" : "0"),
                new MultipartForm.File("Asset", asset.Name, asset.Metadata.ContentType, asset.Data)
            };

            // Make the remote storage request
            try
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(m_serverUrl);
                
                HttpWebResponse response = MultipartForm.Post(request, postParameters);
                using (Stream responseStream = response.GetResponseStream())
                {
                    string responseStr = null;

                    try
                    {
                        responseStr = responseStream.GetStreamString();
                        OSD responseOSD = OSDParser.Deserialize(responseStr);
                        if (responseOSD.Type == OSDType.Map)
                        {
                            OSDMap responseMap = (OSDMap)responseOSD;
                            if (responseMap["Success"].AsBoolean())
                                return asset.ID;
                            else
                                errorMessage = "Upload failed: " + responseMap["Message"].AsString();
                        }
                        else
                        {
                            errorMessage = "Response format was invalid:\n" + responseStr;
                        }
                    }
                    catch (Exception ex)
                    {
                        if (!String.IsNullOrEmpty(responseStr))
                            errorMessage = "Failed to parse the response:\n" + responseStr;
                        else
                            errorMessage = "Failed to retrieve the response: " + ex.Message;
                    }
                }
            }
            catch (WebException ex)
            {
                errorMessage = ex.Message;
            }

            m_log.WarnFormat("[SIMIAN ASSET CONNECTOR]: Failed to store asset \"{0}\" ({1}, {2}): {3}",
                asset.Name, asset.ID, asset.Metadata.ContentType, errorMessage);
            return null;
        }

        /// <summary>
        /// Update an asset's content
        /// </summary>
        /// Attachments and bare scripts need this!!
        /// <param name="id"> </param>
        /// <param name="data"></param>
        /// <returns></returns>
        public bool UpdateContent(string id, byte[] data)
        {
            AssetBase asset = Get(id);

            if (asset == null)
            {
                m_log.Warn("[SIMIAN ASSET CONNECTOR]: Failed to fetch asset " + id + " for updating");
                return false;
            }

            asset.Data = data;

            string result = Store(asset);
            return !String.IsNullOrEmpty(result);
        }

        /// <summary>
        /// Delete an asset
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public bool Delete(string id)
        {
            string errorMessage = String.Empty;
            string url = m_serverUrl + id;

            if (m_cache != null)
                m_cache.Expire(id);

            try
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
                request.Method = "DELETE";

                using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
                {
                    if (response.StatusCode != HttpStatusCode.NoContent)
                    {
                        m_log.Warn("[SIMIAN ASSET CONNECTOR]: Unexpected response when deleting asset " + url + ": " +
                            response.StatusCode + " (" + response.StatusDescription + ")");
                    }
                }

                return true;
            }
            catch (Exception ex)
            {
                m_log.Warn("[SIMIAN ASSET CONNECTOR]: Failed to delete asset " + id + " from the asset service: " + ex.Message);
                return false;
            }
        }

        #endregion IAssetService

        private AssetBase GetRemote(string id)
        {
            AssetBase asset = null;
            Uri url;

            // Determine if id is an absolute URL or a grid-relative UUID
            if (!Uri.TryCreate(id, UriKind.Absolute, out url))
                url = new Uri(m_serverUrl + id);

            try
            {
                HttpWebRequest request = UntrustedHttpWebRequest.Create(url);

                using (WebResponse response = request.GetResponse())
                {
                    using (Stream responseStream = response.GetResponseStream())
                    {
                        string creatorID = response.Headers.GetOne("X-Asset-Creator-Id") ?? String.Empty;

                        // Create the asset object
                        asset = new AssetBase(id, String.Empty, SLUtil.ContentTypeToSLAssetType(response.ContentType), creatorID);

                        UUID assetID;
                        if (UUID.TryParse(id, out assetID))
                            asset.FullID = assetID;

                        // Grab the asset data from the response stream
                        using (MemoryStream stream = new MemoryStream())
                        {
                            responseStream.CopyTo(stream, Int32.MaxValue);
                            asset.Data = stream.ToArray();
                        }
                    }
                }

                // Cache store
                if (m_cache != null && asset != null)
                    m_cache.Cache(asset);

                return asset;
            }
            catch (Exception ex)
            {
                m_log.Warn("[SIMIAN ASSET CONNECTOR]: Asset GET from " + url + " failed: " + ex.Message);
                return null;
            }
        }
    }
}