aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Region/Environment/Modules/ScriptsHttpRequests.cs
blob: f8798dc6db0a26e54719e9237c7b3e417cc86216 (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
/*
* 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 OpenSim 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.Text;
using System.Threading;
using libsecondlife;
using Nini.Config;
using OpenSim.Region.Environment.Interfaces;
using OpenSim.Region.Environment.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
 * its 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 repsonse size?
 * Configurable
 * 
 * **************************************************/

namespace OpenSim.Region.Environment.Modules
{
    public class ScriptHTTPRequests : IRegionModule, IHttpRequests
    {
        private Scene m_scene;
        private Queue<HttpRequestClass> rpcQueue = new Queue<HttpRequestClass>();
        private object HttpListLock = new object();
        private string m_name = "HttpScriptRequests";
        private int httpTimeout = 300;

        // <request id, HttpRequestClass>
        private Dictionary<LLUUID, HttpRequestClass> m_pendingRequests;

        public ScriptHTTPRequests()
        {
        }

        public void Initialise(Scene scene, IConfigSource config)
        {
            m_scene = scene;

            m_scene.RegisterModuleInterface<IHttpRequests>(this);

            m_pendingRequests = new Dictionary<LLUUID, HttpRequestClass>();
        }

        public void PostInitialise()
        {
        }

        public void Close()
        {
        }

        public string Name
        {
            get { return m_name; }
        }

        public bool IsSharedModule
        {
            get { return true; }
        }

        public LLUUID MakeHttpRequest(string url, string parameters, string body)
        {
            return LLUUID.Zero;
        }

        public LLUUID StartHttpRequest(uint localID, LLUUID itemID, string url, List<string> parameters, string body)
        {
            LLUUID reqID = LLUUID.Random();
            HttpRequestClass htc = new HttpRequestClass();

            // Parameters are expected in {key, value, ... , key, value}
            if (parameters != null)
            {
                string[] parms = parameters.ToArray();
                for (int i = 0; i < parms.Length/2; i += 2)
                {
                    switch (Int32.Parse(parms[i]))
                    {
                        case HttpRequestClass.HTTP_METHOD:

                            htc.httpMethod = parms[i + 1];
                            break;

                        case HttpRequestClass.HTTP_MIMETYPE:

                            htc.httpMIMEType = parms[i + 1];
                            break;

                        case HttpRequestClass.HTTP_BODY_MAXLENGTH:

                            // TODO implement me
                            break;

                        case HttpRequestClass.HTTP_VERIFY_CERT:

                            // TODO implement me
                            break;
                    }
                }
            }

            htc.localID = localID;
            htc.itemID = itemID;
            htc.url = url;
            htc.reqID = reqID;
            htc.httpTimeout = httpTimeout;
            htc.outbound_body = body;

            lock (HttpListLock)
            {
                m_pendingRequests.Add(reqID, htc);
            }

            htc.process();

            return reqID;
        }

        public void StopHttpRequest(uint m_localID, LLUUID m_itemID)
        {
            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
        * finsihed.  I thought about setting up a queue for this, but
        * it will need some refactoring and this works 'enough' right now
        */

        public HttpRequestClass GetNextCompletedRequest()
        {
            lock (HttpListLock)
            {
                foreach (LLUUID luid in m_pendingRequests.Keys)
                {
                    HttpRequestClass tmpReq;

                    if (m_pendingRequests.TryGetValue(luid, out tmpReq))
                    {
                        if (tmpReq.finished)
                        {
                            m_pendingRequests.Remove(luid);
                            return tmpReq;
                        }
                    }
                }
            }
            return null;
        }
    }

    //
    // HTTP REAQUEST
    // This class was originally in LSLLongCmdHandler
    //
    // TODO: setter/getter methods, maybe pass some in
    // constructor
    //

    public class HttpRequestClass
    {
        // Constants for parameters
        public const int HTTP_METHOD = 0;
        public const int HTTP_MIMETYPE = 1;
        public const int HTTP_BODY_MAXLENGTH = 2;
        public const int HTTP_VERIFY_CERT = 3;

        // Parameter members and default values
        public string httpMethod = "GET";
        public string httpMIMEType = "text/plain;charset=utf-8";
        public int httpBodyMaxLen = 2048; // not implemented
        public bool httpVerifyCert = true; // not implemented

        // Request info
        public uint localID;
        public LLUUID itemID;
        public LLUUID reqID;
        public int httpTimeout;
        public string url;
        public string outbound_body;
        public DateTime next;
        public int status;
        public bool finished;
        public List<string> response_metadata;
        public string response_body;
        public HttpWebRequest request;
        private Thread httpThread;

        public void process()
        {
            httpThread = new Thread(SendRequest);
            httpThread.Name = "HttpRequestThread";
            httpThread.Priority = ThreadPriority.BelowNormal;
            httpThread.IsBackground = true;
            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;

                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 = Encoding.ASCII.GetString(buf, 0, count);

                        // continue building the string
                        sb.Append(tempString);
                    }
                } while (count > 0); // any more data to read?

                response_body = sb.ToString();
            }
            catch (Exception e)
            {
                status = 499;
                response_body = e.Message;
                finished = true;
                return;
            }

            status = 200;
            finished = true;
        }

        public void Stop()
        {
            try
            {
                httpThread.Abort();
            }
            catch (Exception)
            {
            }
        }
    }
}