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author | Adam Frisby | 2008-05-01 15:46:46 +0000 |
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committer | Adam Frisby | 2008-05-01 15:46:46 +0000 |
commit | 5da028f6ef904857c52f56db6cb91494a1064a12 (patch) | |
tree | 6fbc8a4403c603c7aab3a58734b3a714e442aa19 /OpenSim/Framework/Communications | |
parent | * Cleaned namespaces of entire solution. OpenSim directories now correspond w... (diff) | |
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* Removing duplicate files that somehow got undeleted from TortoiseSVN. Fixed.
Diffstat (limited to '')
-rw-r--r-- | OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs | 183 | ||||
-rw-r--r-- | OpenSim/Framework/Communications/RestClient/RestClient.cs | 395 |
2 files changed, 0 insertions, 578 deletions
diff --git a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs deleted file mode 100644 index 728e25b..0000000 --- a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs +++ /dev/null | |||
@@ -1,183 +0,0 @@ | |||
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 OpenSim 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.Threading; | ||
30 | |||
31 | namespace OpenSim.Framework.Communications | ||
32 | { | ||
33 | internal class SimpleAsyncResult : IAsyncResult | ||
34 | { | ||
35 | private readonly AsyncCallback m_callback; | ||
36 | |||
37 | /// <summary> | ||
38 | /// Is process completed? | ||
39 | /// </summary> | ||
40 | /// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks> | ||
41 | private byte m_completed; | ||
42 | |||
43 | /// <summary> | ||
44 | /// Did process complete synchroneously? | ||
45 | /// </summary> | ||
46 | /// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about | ||
47 | /// booleans and VolatileRead as m_completed | ||
48 | /// </remarks> | ||
49 | private byte m_completedSynchronously; | ||
50 | |||
51 | private readonly object m_asyncState; | ||
52 | private ManualResetEvent m_waitHandle; | ||
53 | private Exception m_exception; | ||
54 | |||
55 | internal SimpleAsyncResult(AsyncCallback cb, object state) | ||
56 | { | ||
57 | m_callback = cb; | ||
58 | m_asyncState = state; | ||
59 | m_completed = 0; | ||
60 | m_completedSynchronously = 1; | ||
61 | } | ||
62 | |||
63 | #region IAsyncResult Members | ||
64 | |||
65 | public object AsyncState | ||
66 | { | ||
67 | get { return m_asyncState; } | ||
68 | } | ||
69 | |||
70 | public WaitHandle AsyncWaitHandle | ||
71 | { | ||
72 | get | ||
73 | { | ||
74 | if (m_waitHandle == null) | ||
75 | { | ||
76 | bool done = IsCompleted; | ||
77 | ManualResetEvent mre = new ManualResetEvent(done); | ||
78 | if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null) | ||
79 | { | ||
80 | mre.Close(); | ||
81 | } | ||
82 | else | ||
83 | { | ||
84 | if (!done && IsCompleted) | ||
85 | { | ||
86 | m_waitHandle.Set(); | ||
87 | } | ||
88 | } | ||
89 | } | ||
90 | return m_waitHandle; | ||
91 | } | ||
92 | } | ||
93 | |||
94 | |||
95 | public bool CompletedSynchronously | ||
96 | { | ||
97 | get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; } | ||
98 | } | ||
99 | |||
100 | |||
101 | public bool IsCompleted | ||
102 | { | ||
103 | get { return Thread.VolatileRead(ref m_completed) == 1; } | ||
104 | } | ||
105 | |||
106 | #endregion | ||
107 | |||
108 | #region class Methods | ||
109 | |||
110 | internal void SetAsCompleted(bool completedSynchronously) | ||
111 | { | ||
112 | m_completed = 1; | ||
113 | if (completedSynchronously) | ||
114 | m_completedSynchronously = 1; | ||
115 | else | ||
116 | m_completedSynchronously = 0; | ||
117 | |||
118 | SignalCompletion(); | ||
119 | } | ||
120 | |||
121 | internal void HandleException(Exception e, bool completedSynchronously) | ||
122 | { | ||
123 | m_completed = 1; | ||
124 | if (completedSynchronously) | ||
125 | m_completedSynchronously = 1; | ||
126 | else | ||
127 | m_completedSynchronously = 0; | ||
128 | m_exception = e; | ||
129 | |||
130 | SignalCompletion(); | ||
131 | } | ||
132 | |||
133 | private void SignalCompletion() | ||
134 | { | ||
135 | if (m_waitHandle != null) m_waitHandle.Set(); | ||
136 | |||
137 | if (m_callback != null) m_callback(this); | ||
138 | } | ||
139 | |||
140 | public void EndInvoke() | ||
141 | { | ||
142 | // This method assumes that only 1 thread calls EndInvoke | ||
143 | if (!IsCompleted) | ||
144 | { | ||
145 | // If the operation isn't done, wait for it | ||
146 | AsyncWaitHandle.WaitOne(); | ||
147 | AsyncWaitHandle.Close(); | ||
148 | m_waitHandle = null; // Allow early GC | ||
149 | } | ||
150 | |||
151 | // Operation is done: if an exception occured, throw it | ||
152 | if (m_exception != null) throw m_exception; | ||
153 | } | ||
154 | |||
155 | #endregion | ||
156 | } | ||
157 | |||
158 | internal class AsyncResult<T> : SimpleAsyncResult | ||
159 | { | ||
160 | private T m_result = default(T); | ||
161 | |||
162 | public AsyncResult(AsyncCallback asyncCallback, Object state) : | ||
163 | base(asyncCallback, state) | ||
164 | { | ||
165 | } | ||
166 | |||
167 | public void SetAsCompleted(T result, bool completedSynchronously) | ||
168 | { | ||
169 | // Save the asynchronous operation's result | ||
170 | m_result = result; | ||
171 | |||
172 | // Tell the base class that the operation completed | ||
173 | // sucessfully (no exception) | ||
174 | base.SetAsCompleted(completedSynchronously); | ||
175 | } | ||
176 | |||
177 | public new T EndInvoke() | ||
178 | { | ||
179 | base.EndInvoke(); | ||
180 | return m_result; | ||
181 | } | ||
182 | } | ||
183 | } | ||
diff --git a/OpenSim/Framework/Communications/RestClient/RestClient.cs b/OpenSim/Framework/Communications/RestClient/RestClient.cs deleted file mode 100644 index 6877690..0000000 --- a/OpenSim/Framework/Communications/RestClient/RestClient.cs +++ /dev/null | |||
@@ -1,395 +0,0 @@ | |||
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 OpenSim 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.Generic; | ||
30 | using System.IO; | ||
31 | using System.Net; | ||
32 | using System.Reflection; | ||
33 | using System.Text; | ||
34 | using System.Threading; | ||
35 | using System.Web; | ||
36 | using log4net; | ||
37 | |||
38 | namespace OpenSim.Framework.Communications | ||
39 | { | ||
40 | /// <summary> | ||
41 | /// Implementation of a generic REST client | ||
42 | /// </summary> | ||
43 | /// <remarks> | ||
44 | /// This class is a generic implementation of a REST (Representational State Transfer) web service. This | ||
45 | /// class is designed to execute both synchroneously and asynchroneously. | ||
46 | /// | ||
47 | /// Internally the implementation works as a two stage asynchroneous web-client. | ||
48 | /// When the request is initiated, RestClient will query asynchroneously for for a web-response, | ||
49 | /// sleeping until the initial response is returned by the server. Once the initial response is retrieved | ||
50 | /// the second stage of asynchroneous requests will be triggered, in an attempt to read of the response | ||
51 | /// object into a memorystream as a sequence of asynchroneous reads. | ||
52 | /// | ||
53 | /// The asynchronisity of RestClient is designed to move as much processing into the back-ground, allowing | ||
54 | /// other threads to execute, while it waits for a response from the web-service. RestClient it self, can be | ||
55 | /// invoked by the caller in either synchroneous mode or asynchroneous mode. | ||
56 | /// </remarks> | ||
57 | public class RestClient | ||
58 | { | ||
59 | private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); | ||
60 | |||
61 | private string realuri; | ||
62 | |||
63 | #region member variables | ||
64 | |||
65 | /// <summary> | ||
66 | /// The base Uri of the web-service e.g. http://www.google.com | ||
67 | /// </summary> | ||
68 | private string _url; | ||
69 | |||
70 | /// <summary> | ||
71 | /// Path elements of the query | ||
72 | /// </summary> | ||
73 | private List<string> _pathElements = new List<string>(); | ||
74 | |||
75 | /// <summary> | ||
76 | /// Parameter elements of the query, e.g. min=34 | ||
77 | /// </summary> | ||
78 | private Dictionary<string, string> _parameterElements = new Dictionary<string, string>(); | ||
79 | |||
80 | /// <summary> | ||
81 | /// Request method. E.g. GET, POST, PUT or DELETE | ||
82 | /// </summary> | ||
83 | private string _method; | ||
84 | |||
85 | /// <summary> | ||
86 | /// Temporary buffer used to store bytes temporarily as they come in from the server | ||
87 | /// </summary> | ||
88 | private byte[] _readbuf; | ||
89 | |||
90 | /// <summary> | ||
91 | /// MemoryStream representing the resultiong resource | ||
92 | /// </summary> | ||
93 | private Stream _resource; | ||
94 | |||
95 | /// <summary> | ||
96 | /// WebRequest object, held as a member variable | ||
97 | /// </summary> | ||
98 | private HttpWebRequest _request; | ||
99 | |||
100 | /// <summary> | ||
101 | /// WebResponse object, held as a member variable, so we can close it | ||
102 | /// </summary> | ||
103 | private HttpWebResponse _response; | ||
104 | |||
105 | /// <summary> | ||
106 | /// This flag will help block the main synchroneous method, in case we run in synchroneous mode | ||
107 | /// </summary> | ||
108 | public static ManualResetEvent _allDone = new ManualResetEvent(false); | ||
109 | |||
110 | /// <summary> | ||
111 | /// Default time out period | ||
112 | /// </summary> | ||
113 | private const int DefaultTimeout = 10*1000; // 10 seconds timeout | ||
114 | |||
115 | /// <summary> | ||
116 | /// Default Buffer size of a block requested from the web-server | ||
117 | /// </summary> | ||
118 | private const int BufferSize = 4096; // Read blocks of 4 KB. | ||
119 | |||
120 | |||
121 | /// <summary> | ||
122 | /// if an exception occours during async processing, we need to save it, so it can be | ||
123 | /// rethrown on the primary thread; | ||
124 | /// </summary> | ||
125 | private Exception _asyncException; | ||
126 | |||
127 | #endregion member variables | ||
128 | |||
129 | #region constructors | ||
130 | |||
131 | /// <summary> | ||
132 | /// Instantiate a new RestClient | ||
133 | /// </summary> | ||
134 | /// <param name="url">Web-service to query, e.g. http://osgrid.org:8003</param> | ||
135 | public RestClient(string url) | ||
136 | { | ||
137 | _url = url; | ||
138 | _readbuf = new byte[BufferSize]; | ||
139 | _resource = new MemoryStream(); | ||
140 | _request = null; | ||
141 | _response = null; | ||
142 | _lock = new object(); | ||
143 | } | ||
144 | |||
145 | private object _lock; | ||
146 | |||
147 | #endregion constructors | ||
148 | |||
149 | /// <summary> | ||
150 | /// Add a path element to the query, e.g. assets | ||
151 | /// </summary> | ||
152 | /// <param name="element">path entry</param> | ||
153 | public void AddResourcePath(string element) | ||
154 | { | ||
155 | if (isSlashed(element)) | ||
156 | _pathElements.Add(element.Substring(0, element.Length - 1)); | ||
157 | else | ||
158 | _pathElements.Add(element); | ||
159 | } | ||
160 | |||
161 | /// <summary> | ||
162 | /// Add a query parameter to the Url | ||
163 | /// </summary> | ||
164 | /// <param name="name">Name of the parameter, e.g. min</param> | ||
165 | /// <param name="value">Value of the parameter, e.g. 42</param> | ||
166 | public void AddQueryParameter(string name, string value) | ||
167 | { | ||
168 | _parameterElements.Add(HttpUtility.UrlEncode(name), HttpUtility.UrlEncode(value)); | ||
169 | } | ||
170 | |||
171 | /// <summary> | ||
172 | /// Add a query parameter to the Url | ||
173 | /// </summary> | ||
174 | /// <param name="name">Name of the parameter, e.g. min</param> | ||
175 | public void AddQueryParameter(string name) | ||
176 | { | ||
177 | _parameterElements.Add(HttpUtility.UrlEncode(name), null); | ||
178 | } | ||
179 | |||
180 | /// <summary> | ||
181 | /// Web-Request method, e.g. GET, PUT, POST, DELETE | ||
182 | /// </summary> | ||
183 | public string RequestMethod | ||
184 | { | ||
185 | get { return _method; } | ||
186 | set { _method = value; } | ||
187 | } | ||
188 | |||
189 | /// <summary> | ||
190 | /// True if string contains a trailing slash '/' | ||
191 | /// </summary> | ||
192 | /// <param name="s">string to be examined</param> | ||
193 | /// <returns>true if slash is present</returns> | ||
194 | private bool isSlashed(string s) | ||
195 | { | ||
196 | return s.Substring(s.Length - 1, 1) == "/"; | ||
197 | } | ||
198 | |||
199 | /// <summary> | ||
200 | /// Build a Uri based on the initial Url, path elements and parameters | ||
201 | /// </summary> | ||
202 | /// <returns>fully constructed Uri</returns> | ||
203 | private Uri buildUri() | ||
204 | { | ||
205 | StringBuilder sb = new StringBuilder(); | ||
206 | sb.Append(_url); | ||
207 | |||
208 | foreach (string e in _pathElements) | ||
209 | { | ||
210 | sb.Append("/"); | ||
211 | sb.Append(e); | ||
212 | } | ||
213 | |||
214 | bool firstElement = true; | ||
215 | foreach (KeyValuePair<string, string> kv in _parameterElements) | ||
216 | { | ||
217 | if (firstElement) | ||
218 | { | ||
219 | sb.Append("?"); | ||
220 | firstElement = false; | ||
221 | } | ||
222 | else | ||
223 | sb.Append("&"); | ||
224 | |||
225 | sb.Append(kv.Key); | ||
226 | if (kv.Value != null && kv.Value.Length != 0) | ||
227 | { | ||
228 | sb.Append("="); | ||
229 | sb.Append(kv.Value); | ||
230 | } | ||
231 | } | ||
232 | realuri = sb.ToString(); | ||
233 | //m_log.InfoFormat("[REST CLIENT]: RestURL: {0}", realuri); | ||
234 | return new Uri(sb.ToString()); | ||
235 | } | ||
236 | |||
237 | #region Async communications with server | ||
238 | |||
239 | /// <summary> | ||
240 | /// Async method, invoked when a block of data has been received from the service | ||
241 | /// </summary> | ||
242 | /// <param name="ar"></param> | ||
243 | private void StreamIsReadyDelegate(IAsyncResult ar) | ||
244 | { | ||
245 | try | ||
246 | { | ||
247 | Stream s = (Stream) ar.AsyncState; | ||
248 | int read = s.EndRead(ar); | ||
249 | |||
250 | if (read > 0) | ||
251 | { | ||
252 | _resource.Write(_readbuf, 0, read); | ||
253 | IAsyncResult asynchronousResult = | ||
254 | s.BeginRead(_readbuf, 0, BufferSize, new AsyncCallback(StreamIsReadyDelegate), s); | ||
255 | |||
256 | // TODO! Implement timeout, without killing the server | ||
257 | //ThreadPool.RegisterWaitForSingleObject(asynchronousResult.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), _request, DefaultTimeout, true); | ||
258 | } | ||
259 | else | ||
260 | { | ||
261 | s.Close(); | ||
262 | _allDone.Set(); | ||
263 | } | ||
264 | } | ||
265 | catch (Exception e) | ||
266 | { | ||
267 | _allDone.Set(); | ||
268 | _asyncException = e; | ||
269 | } | ||
270 | } | ||
271 | |||
272 | #endregion Async communications with server | ||
273 | |||
274 | /// <summary> | ||
275 | /// Perform synchroneous request | ||
276 | /// </summary> | ||
277 | public Stream Request() | ||
278 | { | ||
279 | lock (_lock) | ||
280 | { | ||
281 | _request = (HttpWebRequest) WebRequest.Create(buildUri()); | ||
282 | _request.KeepAlive = false; | ||
283 | _request.ContentType = "application/xml"; | ||
284 | _request.Timeout = 200000; | ||
285 | _asyncException = null; | ||
286 | |||
287 | // IAsyncResult responseAsyncResult = _request.BeginGetResponse(new AsyncCallback(ResponseIsReadyDelegate), _request); | ||
288 | _response = (HttpWebResponse) _request.GetResponse(); | ||
289 | Stream src = _response.GetResponseStream(); | ||
290 | int length = src.Read(_readbuf, 0, BufferSize); | ||
291 | while (length > 0) | ||
292 | { | ||
293 | _resource.Write(_readbuf, 0, length); | ||
294 | length = src.Read(_readbuf, 0, BufferSize); | ||
295 | } | ||
296 | |||
297 | |||
298 | // TODO! Implement timeout, without killing the server | ||
299 | // this line implements the timeout, if there is a timeout, the callback fires and the request becomes aborted | ||
300 | //ThreadPool.RegisterWaitForSingleObject(responseAsyncResult.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), _request, DefaultTimeout, true); | ||
301 | |||
302 | // _allDone.WaitOne(); | ||
303 | if (_response != null) | ||
304 | _response.Close(); | ||
305 | if (_asyncException != null) | ||
306 | throw _asyncException; | ||
307 | |||
308 | if (_resource != null) | ||
309 | { | ||
310 | _resource.Flush(); | ||
311 | _resource.Seek(0, SeekOrigin.Begin); | ||
312 | } | ||
313 | |||
314 | return _resource; | ||
315 | } | ||
316 | } | ||
317 | |||
318 | public Stream Request(Stream src) | ||
319 | { | ||
320 | _request = (HttpWebRequest) WebRequest.Create(buildUri()); | ||
321 | _request.KeepAlive = false; | ||
322 | _request.ContentType = "application/xml"; | ||
323 | _request.Timeout = 900000; | ||
324 | _request.Method = RequestMethod; | ||
325 | _asyncException = null; | ||
326 | _request.ContentLength = src.Length; | ||
327 | |||
328 | m_log.InfoFormat("[REST]: Request Length {0}", _request.ContentLength); | ||
329 | m_log.InfoFormat("[REST]: Sending Web Request {0}", buildUri()); | ||
330 | src.Seek(0, SeekOrigin.Begin); | ||
331 | m_log.Info("[REST]: Seek is ok"); | ||
332 | Stream dst = _request.GetRequestStream(); | ||
333 | m_log.Info("[REST]: GetRequestStream is ok"); | ||
334 | |||
335 | byte[] buf = new byte[1024]; | ||
336 | int length = src.Read(buf, 0, 1024); | ||
337 | m_log.Info("[REST]: First Read is ok"); | ||
338 | while (length > 0) | ||
339 | { | ||
340 | dst.Write(buf, 0, length); | ||
341 | length = src.Read(buf, 0, 1024); | ||
342 | } | ||
343 | |||
344 | _response = (HttpWebResponse) _request.GetResponse(); | ||
345 | |||
346 | // IAsyncResult responseAsyncResult = _request.BeginGetResponse(new AsyncCallback(ResponseIsReadyDelegate), _request); | ||
347 | |||
348 | // TODO! Implement timeout, without killing the server | ||
349 | // this line implements the timeout, if there is a timeout, the callback fires and the request becomes aborted | ||
350 | //ThreadPool.RegisterWaitForSingleObject(responseAsyncResult.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback), _request, DefaultTimeout, true); | ||
351 | |||
352 | return null; | ||
353 | } | ||
354 | |||
355 | #region Async Invocation | ||
356 | |||
357 | public IAsyncResult BeginRequest(AsyncCallback callback, object state) | ||
358 | { | ||
359 | /// <summary> | ||
360 | /// In case, we are invoked asynchroneously this object will keep track of the state | ||
361 | /// </summary> | ||
362 | AsyncResult<Stream> ar = new AsyncResult<Stream>(callback, state); | ||
363 | ThreadPool.QueueUserWorkItem(RequestHelper, ar); | ||
364 | return ar; | ||
365 | } | ||
366 | |||
367 | public Stream EndRequest(IAsyncResult asyncResult) | ||
368 | { | ||
369 | AsyncResult<Stream> ar = (AsyncResult<Stream>) asyncResult; | ||
370 | |||
371 | // Wait for operation to complete, then return result or | ||
372 | // throw exception | ||
373 | return ar.EndInvoke(); | ||
374 | } | ||
375 | |||
376 | private void RequestHelper(Object asyncResult) | ||
377 | { | ||
378 | // We know that it's really an AsyncResult<DateTime> object | ||
379 | AsyncResult<Stream> ar = (AsyncResult<Stream>) asyncResult; | ||
380 | try | ||
381 | { | ||
382 | // Perform the operation; if sucessful set the result | ||
383 | Stream s = Request(); | ||
384 | ar.SetAsCompleted(s, false); | ||
385 | } | ||
386 | catch (Exception e) | ||
387 | { | ||
388 | // If operation fails, set the exception | ||
389 | ar.HandleException(e, false); | ||
390 | } | ||
391 | } | ||
392 | |||
393 | #endregion Async Invocation | ||
394 | } | ||
395 | } | ||