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
454
455
456
457
458
459
460
461
462
463
464
465
466
467
|
/*
* 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.Net.Security;
using System.Text;
using System.Threading;
using System.Security.Cryptography.X509Certificates;
using Nini.Config;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Framework.Servers;
using OpenSim.Framework.Servers.HttpServer;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
/*****************************************************
*
* ScriptsHttpRequests
*
* Implements the llHttpRequest and http_response
* callback.
*
* Some stuff was already in LSLLongCmdHandler, and then
* there was this file with a stub class in it. So,
* I am moving some of the objects and functions out of
* LSLLongCmdHandler, such as the HttpRequestClass, the
* start and stop methods, and setting up pending and
* completed queues. These are processed in the
* LSLLongCmdHandler polling loop. Similiar to the
* XMLRPCModule, since that seems to work.
*
* //TODO
*
* This probably needs some throttling mechanism but
* it's wide open right now. This applies to both
* number of requests and data volume.
*
* Linden puts all kinds of header fields in the requests.
* Not doing any of that:
* User-Agent
* X-SecondLife-Shard
* X-SecondLife-Object-Name
* X-SecondLife-Object-Key
* X-SecondLife-Region
* X-SecondLife-Local-Position
* X-SecondLife-Local-Velocity
* X-SecondLife-Local-Rotation
* X-SecondLife-Owner-Name
* X-SecondLife-Owner-Key
*
* HTTPS support
*
* Configurable timeout?
* Configurable max response size?
* Configurable
*
* **************************************************/
namespace OpenSim.Region.CoreModules.Scripting.HttpRequest
{
public class HttpRequestModule : IRegionModule, IHttpRequestModule
{
private object HttpListLock = new object();
private int httpTimeout = 30000;
private string m_name = "HttpScriptRequests";
private string m_proxyurl = "";
private string m_proxyexcepts = "";
// <request id, HttpRequestClass>
private Dictionary<UUID, HttpRequestClass> m_pendingRequests;
private Scene m_scene;
// private Queue<HttpRequestClass> rpcQueue = new Queue<HttpRequestClass>();
public HttpRequestModule()
{
ServicePointManager.ServerCertificateValidationCallback +=ValidateServerCertificate;
}
public static bool ValidateServerCertificate(
object sender,
X509Certificate certificate,
X509Chain chain,
SslPolicyErrors sslPolicyErrors)
{
HttpWebRequest Request = (HttpWebRequest)sender;
if (Request.Headers.Get("NoVerifyCert") != null)
{
return true;
}
return chain.Build(new X509Certificate2(certificate));
}
#region IHttpRequestModule Members
public UUID MakeHttpRequest(string url, string parameters, string body)
{
return UUID.Zero;
}
public UUID StartHttpRequest(uint localID, UUID itemID, string url, List<string> parameters, Dictionary<string, string> headers, string body)
{
UUID reqID = UUID.Random();
HttpRequestClass htc = new HttpRequestClass();
// Partial implementation: support for parameter flags needed
// see http://wiki.secondlife.com/wiki/LlHTTPRequest
//
// Parameters are expected in {key, value, ... , key, value}
if (parameters != null)
{
string[] parms = parameters.ToArray();
for (int i = 0; i < parms.Length; i += 2)
{
switch (Int32.Parse(parms[i]))
{
case (int)HttpRequestConstants.HTTP_METHOD:
htc.HttpMethod = parms[i + 1];
break;
case (int)HttpRequestConstants.HTTP_MIMETYPE:
htc.HttpMIMEType = parms[i + 1];
break;
case (int)HttpRequestConstants.HTTP_BODY_MAXLENGTH:
// TODO implement me
break;
case (int)HttpRequestConstants.HTTP_VERIFY_CERT:
htc.HttpVerifyCert = (int.Parse(parms[i + 1]) != 0);
break;
}
}
}
htc.LocalID = localID;
htc.ItemID = itemID;
htc.Url = url;
htc.ReqID = reqID;
htc.HttpTimeout = httpTimeout;
htc.OutboundBody = body;
htc.ResponseHeaders = headers;
htc.proxyurl = m_proxyurl;
htc.proxyexcepts = m_proxyexcepts;
lock (HttpListLock)
{
m_pendingRequests.Add(reqID, htc);
}
htc.Process();
return reqID;
}
public void StopHttpRequest(uint m_localID, UUID m_itemID)
{
if (m_pendingRequests != null)
{
lock (HttpListLock)
{
HttpRequestClass tmpReq;
if (m_pendingRequests.TryGetValue(m_itemID, out tmpReq))
{
tmpReq.Stop();
m_pendingRequests.Remove(m_itemID);
}
}
}
}
/*
* TODO
* Not sure how important ordering is is here - the next first
* one completed in the list is returned, based soley on its list
* position, not the order in which the request was started or
* finished. I thought about setting up a queue for this, but
* it will need some refactoring and this works 'enough' right now
*/
public IServiceRequest GetNextCompletedRequest()
{
lock (HttpListLock)
{
foreach (UUID luid in m_pendingRequests.Keys)
{
HttpRequestClass tmpReq;
if (m_pendingRequests.TryGetValue(luid, out tmpReq))
{
if (tmpReq.Finished)
{
return tmpReq;
}
}
}
}
return null;
}
public void RemoveCompletedRequest(UUID id)
{
lock (HttpListLock)
{
HttpRequestClass tmpReq;
if (m_pendingRequests.TryGetValue(id, out tmpReq))
{
tmpReq.Stop();
tmpReq = null;
m_pendingRequests.Remove(id);
}
}
}
#endregion
#region IRegionModule Members
public void Initialise(Scene scene, IConfigSource config)
{
m_scene = scene;
m_scene.RegisterModuleInterface<IHttpRequestModule>(this);
m_proxyurl = config.Configs["Startup"].GetString("HttpProxy");
m_proxyexcepts = config.Configs["Startup"].GetString("HttpProxyExceptions");
m_pendingRequests = new Dictionary<UUID, HttpRequestClass>();
}
public void PostInitialise()
{
}
public void Close()
{
}
public string Name
{
get { return m_name; }
}
public bool IsSharedModule
{
get { return true; }
}
#endregion
}
public class HttpRequestClass: IServiceRequest
{
// Constants for parameters
// public const int HTTP_BODY_MAXLENGTH = 2;
// public const int HTTP_METHOD = 0;
// public const int HTTP_MIMETYPE = 1;
// public const int HTTP_VERIFY_CERT = 3;
private bool _finished;
public bool Finished
{
get { return _finished; }
}
// public int HttpBodyMaxLen = 2048; // not implemented
// Parameter members and default values
public string HttpMethod = "GET";
public string HttpMIMEType = "text/plain;charset=utf-8";
public int HttpTimeout;
public bool HttpVerifyCert = true; // not implemented
private Thread httpThread;
// Request info
private UUID _itemID;
public UUID ItemID
{
get { return _itemID; }
set { _itemID = value; }
}
private uint _localID;
public uint LocalID
{
get { return _localID; }
set { _localID = value; }
}
public DateTime Next;
public string proxyurl;
public string proxyexcepts;
public string OutboundBody;
private UUID _reqID;
public UUID ReqID
{
get { return _reqID; }
set { _reqID = value; }
}
public HttpWebRequest Request;
public string ResponseBody;
public List<string> ResponseMetadata;
public Dictionary<string, string> ResponseHeaders;
public int Status;
public string Url;
public void Process()
{
httpThread = new Thread(SendRequest);
httpThread.Name = "HttpRequestThread";
httpThread.Priority = ThreadPriority.BelowNormal;
httpThread.IsBackground = true;
_finished = false;
httpThread.Start();
}
/*
* TODO: More work on the response codes. Right now
* returning 200 for success or 499 for exception
*/
public void SendRequest()
{
HttpWebResponse response = null;
StringBuilder sb = new StringBuilder();
byte[] buf = new byte[8192];
string tempString = null;
int count = 0;
try
{
Request = (HttpWebRequest) WebRequest.Create(Url);
Request.Method = HttpMethod;
Request.ContentType = HttpMIMEType;
if(!HttpVerifyCert)
{
// We could hijack Connection Group Name to identify
// a desired security exception. But at the moment we'll use a dummy header instead.
// Request.ConnectionGroupName = "NoVerify";
Request.Headers.Add("NoVerifyCert", "true");
}
// else
// {
// Request.ConnectionGroupName="Verify";
// }
if (proxyurl != null && proxyurl.Length > 0)
{
if (proxyexcepts != null && proxyexcepts.Length > 0)
{
string[] elist = proxyexcepts.Split(';');
Request.Proxy = new WebProxy(proxyurl, true, elist);
}
else
{
Request.Proxy = new WebProxy(proxyurl, true);
}
}
foreach (KeyValuePair<string, string> entry in ResponseHeaders)
if (entry.Key.ToLower().Equals("user-agent"))
Request.UserAgent = entry.Value;
else
Request.Headers[entry.Key] = entry.Value;
// Encode outbound data
if (OutboundBody.Length > 0)
{
byte[] data = Util.UTF8.GetBytes(OutboundBody);
Request.ContentLength = data.Length;
Stream bstream = Request.GetRequestStream();
bstream.Write(data, 0, data.Length);
bstream.Close();
}
Request.Timeout = HttpTimeout;
// execute the request
response = (HttpWebResponse) Request.GetResponse();
Stream resStream = response.GetResponseStream();
do
{
// fill the buffer with data
count = resStream.Read(buf, 0, buf.Length);
// make sure we read some data
if (count != 0)
{
// translate from bytes to ASCII text
tempString = Util.UTF8.GetString(buf, 0, count);
// continue building the string
sb.Append(tempString);
}
} while (count > 0); // any more data to read?
ResponseBody = sb.ToString();
}
catch (Exception e)
{
if (e is WebException && ((WebException)e).Status == WebExceptionStatus.ProtocolError)
{
HttpWebResponse webRsp = (HttpWebResponse)((WebException)e).Response;
Status = (int)webRsp.StatusCode;
ResponseBody = webRsp.StatusDescription;
}
else
{
Status = (int)OSHttpStatusCode.ClientErrorJoker;
ResponseBody = e.Message;
}
_finished = true;
return;
}
finally
{
if (response != null)
response.Close();
}
Status = (int)OSHttpStatusCode.SuccessOk;
_finished = true;
}
public void Stop()
{
try
{
httpThread.Abort();
}
catch (Exception)
{
}
}
}
}
|