HTTPDOWNLOADER for updater application block for .Net2.0

updater application block for .Net2.0已经发布了，但是我使用了一下，因为是使用后台更新的缘故，所以速度特别慢。30M的东西差不多要花费30分钟，简直无法忍受，弄了个httpdownloader，在这里共享给大家。
你需要Enterprise Libary 2006

HttpDownloader
  1using System;
  2using System.IO;
  3using System.Net;
  4using System.Threading;
  5using System.Security.Permissions;
  6using Microsoft.ApplicationBlocks.Updater;
  7using Microsoft.ApplicationBlocks.Updater.Configuration;
  8using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
  9namespace x.HttpDownloader
 10{
 11    /**//// <summary>
 12    /// Implements a HTTP downloader for the updater application block V2.0.
 13    /// </summary>
 14    /// <remarks>
 15    /// The <c>HttpDownloader</c> class can be used to download application updates via HTTP. It supports synchronous and asynchronous
 16    /// operation as well as progress reporting. In addition, the progress reporting is not at the file level, it is at the byte level.
 17    /// </remarks>
 18    [ConfigurationElementType(typeof(HttpDownloaderProviderData))]
 19    public sealed class HttpDownloader : IDownloader
 20    {
 21        /**//// <summary>
 22        /// The thread to perform the download.
 23        /// </summary>
 24        private Thread _downloaderThread;
 25
 26        /**//// <summary>
 27        /// Contains configuration settings for the HTTP downloader.
 28        /// </summary>
 29        //private HttpDownloaderProviderData _configuration;
 30
 31        /**//// <summary>
 32        /// The configuration name for this downloader.
 33        /// </summary>
 34        private const string CONFIGURATION_NAME = "downloaders";
 35
 36        /**//// <summary>
 37        /// The download provider name.
 38        /// </summary>
 39        private const string DOWNLOAD_PROVIDER_NAME = "HTTPDownloader";
 40
 41        /**//// <summary>
 42        /// A synchronisation object.
 43        /// </summary>
 44        private readonly object LOCK = new object();
 45
 46        /**//// <summary>
 47        /// Gets the configuration name for the HTTP downloader.
 48        /// </summary>
 49        public string ConfigurationName
 50        {
 51            get
 52            {
 53                return CONFIGURATION_NAME;
 54            }
 55            set
 56            {
 57                //nothing to do
 58            }
 59        }
 60    
 61        /**//// <summary>
 62        /// Initialises the HTTP downloader.
 63        /// </summary>
 64        //public void Initialize(ConfigurationView configurationView)
 65        //{
 66        //    UpdaterConfigurationView updaterConfigurationView = (UpdaterConfigurationView) configurationView;
 67        //    _configuration = (HttpDownloaderProviderData) updaterConfigurationView.GetDownloadProviderData(DOWNLOAD_PROVIDER_NAME);
 68        //}
 69
 70        /**//// <summary>
 71        /// Downloads the specified task synchronously via HTTP. If <paramref name="maxWaitTime"/> is surpassed prior to the download
 72        /// completing, a download error is raised.
 73        /// </summary>
 74        [FileIOPermission(SecurityAction.Demand)]
 75        public void Download(UpdaterTask task, TimeSpan maxWaitTime)
 76        {
 77            try
 78            {
 79                OnDownloadStarted(new TaskEventArgs(task));
 80                //this object is used to perform the downloading on a separate thread
 81                AsyncDownloader downloader = new AsyncDownloader(task, new OnDownloadProgressEventHandler(OnDownloadProgress), new OnDownloadTotalSizeCalculationStartedEventHandler(OnDownloadTotalSizeCalculationStarted), new OnDownloadTotalSizeCalculationProgressEventHandler(OnDownloadTotalSizeCalculationProgress), new OnDownloadTotalSizeCalculationCompletedEventHandler(OnDownloadTotalSizeCalculationCompleted), new OnDownloadCompletedEventHandler(OnDownloadCompleted));
 82                CreateDownloaderThread(downloader);
 83                _downloaderThread.Start();
 84                //DateTime endTime = DateTime.Now + maxWaitTime;
 85                double endTime = Environment.TickCount + maxWaitTime.TotalMilliseconds;
 86                while ((endTime > Environment.TickCount) && !downloader.IsComplete)
 87                {
 88                    Thread.Sleep(100);
 89                }
 90
 91                if (!downloader.IsComplete)
 92                {
 93                    //abort the thread if it didn't complete
 94                    _downloaderThread.Abort();
 95                    throw new ApplicationUpdaterException("Download surpassed time out of " + maxWaitTime);
 96                }
 97                else if (downloader.Exception != null)
 98                {
 99                    //raise the error event if the downloader thread erred out
100                    OnDownloadError(new DownloadTaskErrorEventArgs(task, downloader.Exception));
101                }
102            }
103            catch (Exception e)
104            {
105                OnDownloadError(new DownloadTaskErrorEventArgs(task, e));
106            }
107        }
108
109        /**//// <summary>
110        /// Downloads the specified task asynchronously via HTTP.
111        /// </summary>
112        [FileIOPermission(SecurityAction.Demand)]
113        public void BeginDownload(UpdaterTask task)
114        {
115            try
116            {
117                OnDownloadStarted(new TaskEventArgs(task));
118                //this object is used to perform the downloading on a separate thread
119                AsyncDownloader downloader = new AsyncDownloader(task, new OnDownloadProgressEventHandler(OnDownloadProgress), new OnDownloadTotalSizeCalculationStartedEventHandler(OnDownloadTotalSizeCalculationStarted), new OnDownloadTotalSizeCalculationProgressEventHandler(OnDownloadTotalSizeCalculationProgress), new OnDownloadTotalSizeCalculationCompletedEventHandler(OnDownloadTotalSizeCalculationCompleted), new OnDownloadCompletedEventHandler(OnDownloadCompleted));
120                CreateDownloaderThread(downloader);
121                _downloaderThread.Start();
122            }
123            catch (Exception e)
124            {
125                OnDownloadError(new DownloadTaskErrorEventArgs(task, e));
126            }
127        }
128
129        /**//// <summary>
130        /// Cancels an asynchronous HTTP download operation.
131        /// </summary>
132        public bool CancelDownload(UpdaterTask task)
133        {
134            _downloaderThread.Abort();
135            return true;
136        }
137
138        /**//// <summary>
139        /// Creates the downloader thread.
140        /// </summary>
141        private void CreateDownloaderThread(AsyncDownloader downloader)
142        {
143            _downloaderThread = new Thread(new ThreadStart(downloader.Download));
144            _downloaderThread.Name = "Downloader";
145            _downloaderThread.IsBackground = true;
146        }
147
148        /**//// <summary>
149        /// Delegate for handling the <see cref="DownloadTotalSizeCalculationStarted"/> event.
150        /// </summary>
151        public delegate void DownloadTotalSizeCalculationStartedEventHandler(object sender, TaskEventArgs e);
152
153        /**//// <summary>
154        /// Delegate for handling the <see cref="DownloadTotalSizeCalculationCompleted"/> event.
155        /// </summary>
156        public delegate void DownloadTotalSizeCalculationProgressEventHandler(object sender, DownloadTotalSizeCalculationProgressEventArgs e);
157
158        /**//// <summary>
159        /// Delegate for handling the <see cref="DownloadTotalSizeCalculationCompleted"/> event.
160        /// </summary>
161        public delegate void DownloadTotalSizeCalculationCompletedEventHandler(object sender, TaskEventArgs e);
162
163        /**//// <summary>
164        /// Fired when the HTTP downloader begins calculating file sizes for the files to be downloaded.
165        /// </summary>
166        /// <remarks>
167        /// This event has to be <c>static</c> because the client is unable to obtain a reference to the <c>HttpDownloader</c> instance (updater design flaw).
168        /// </remarks>
169        public static event DownloadTotalSizeCalculationStartedEventHandler DownloadTotalSizeCalculationStarted;
170
171        /**//// <summary>
172        /// Fired when the HTTP downloader has progress information for file size calculations.
173        /// </summary>
174        /// <remarks>
175        /// This event has to be <c>static</c> because the client is unable to obtain a reference to the <c>HttpDownloader</c> instance (updater design flaw).
176        /// </remarks>
177        public static event DownloadTotalSizeCalculationProgressEventHandler DownloadTotalSizeCalculationProgress;
178
179        /**//// <summary>
180        /// Fires when the HTTP downloader has finished calculating file sizes.
181        /// </summary>
182        /// <remarks>
183        /// This event has to be <c>static</c> because the client is unable to obtain a reference to the <c>HttpDownloader</c> instance (updater design flaw).
184        /// </remarks>
185        public static event DownloadTotalSizeCalculationCompletedEventHandler DownloadTotalSizeCalculationCompleted;
186
187        /**//// <summary>
188        /// Fired when the HTTP downloader begins downloading files.
189        /// </summary>
190        public event DownloadTaskStartedEventHandler DownloadStarted;
191
192        /**//// <summary>
193        /// Fired whenever the HTTP downloader has progress information to report about the current downloads.
194        /// </summary>
195        public event DownloadTaskProgressEventHandler DownloadProgress;
196
197        /**//// <summary>
198        /// Fired when the HTTP downloader has finished downloading.
199        /// </summary>
200        public event DownloadTaskCompletedEventHandler DownloadCompleted;
201
202        /**//// <summary>
203        /// Fired when an error occurs in the HTTP downloader whilst attempting to download updates.
204        /// </summary>
205        public event DownloadTaskErrorEventHandler DownloadError;
206
207        /**//// <summary>
208        /// Used to invoke the <see cref="OnDownloadTotalSizeCalculationStarted"/> method.
209        /// </summary>
210        internal delegate void OnDownloadTotalSizeCalculationStartedEventHandler(TaskEventArgs e);
211
212        /**//// <summary>
213        /// Fires the <see cref="DownloadTotalSizeCalculationStarted"/> method.
214        /// </summary>
215        private void OnDownloadTotalSizeCalculationStarted(TaskEventArgs e)
216        {
217            if (DownloadTotalSizeCalculationStarted != null)
218            {
219                DownloadTotalSizeCalculationStarted(this, e);
220            }
221        }
222
223        /**//// <summary>
224        /// Used to invoke the <see cref="OnDownloadTotalSizeCalculationProgress"/> method.
225        /// </summary>
226        internal delegate void OnDownloadTotalSizeCalculationProgressEventHandler(DownloadTotalSizeCalculationProgressEventArgs e);
227
228        /**//// <summary>
229        /// Fires the <see cref="DownloadTotalSizeCalculationProgress"/> method.
230        /// </summary>
231        private void OnDownloadTotalSizeCalculationProgress(DownloadTotalSizeCalculationProgressEventArgs e)
232        {
233            if (DownloadTotalSizeCalculationProgress != null)
234            {
235                DownloadTotalSizeCalculationProgress(this, e);
236            }
237        }
238
239        /**//// <summary>
240        /// Used to invoke the <see cref="OnDownloadTotalSizeCalculationCompleted"/> method.
241        /// </summary>
242        internal delegate void OnDownloadTotalSizeCalculationCompletedEventHandler(TaskEventArgs e);
243
244        /**//// <summary>
245        /// Fires the <see cref="DownloadTotalSizeCalculationCompleted"/> method.
246        /// </summary>
247        private void OnDownloadTotalSizeCalculationCompleted(TaskEventArgs e)
248        {
249            if (DownloadTotalSizeCalculationCompleted != null)
250            {
251                DownloadTotalSizeCalculationCompleted(this, e);
252            }
253        }
254  
255        /**//// <summary>
256        /// Fires the <see cref="DownloadStarted"/> method.
257        /// </summary>
258        private void OnDownloadStarted(TaskEventArgs e)
259        {
260            if (DownloadStarted != null)
261            {
262                DownloadStarted(this, e);
263            }
264        }
265 
266        /**//// <summary>
267        /// Used to invoke the <see cref="OnDownloadProgress"/> method.
268        /// </summary>
269        internal delegate void OnDownloadProgressEventHandler(DownloadTaskProgressEventArgs e);
270
271        /**//// <summary>
272        /// Fires the <see cref="DownloadProgress"/> method.
273        /// </summary>
274        private void OnDownloadProgress(DownloadTaskProgressEventArgs e)
275        {
276            lock (LOCK)
277            {
278                if (DownloadProgress != null)
279                {
280                    DownloadProgress(this, e);
281                }
282            }
283        }
284
285        /**//// <summary>
286        /// Used to invoke the <see cref="OnDownloadCompleted"/> method.
287        /// </summary>
288        internal delegate void OnDownloadCompletedEventHandler(TaskEventArgs e);
289    
290        /**//// <summary>
291        /// Fires the <see cref="DownloadCompleted"/> method.
292        /// </summary>
293        private void OnDownloadCompleted(TaskEventArgs e)
294        {
295            if (DownloadCompleted != null)
296            {
297                DownloadCompleted(this, e);
298            }
299        }
300
301        /**//// <summary>
302        /// Fires the <see cref="DownloadError"/> method.
303        /// </summary>
304        private void OnDownloadError(DownloadTaskErrorEventArgs e)
305        {
306            if (DownloadError != null)
307            {
308                DownloadError(this, e);
309            }
310        }
311
312        /**//// <summary>
313        /// Performs the actual downloading of updated files.
314        /// </summary>
315        private class AsyncDownloader
316        {
317            /**//// <summary>
318            /// The task whose files will be downloaded.
319            /// </summary>
320            private UpdaterTask _task;
321
322            /**//// <summary>
323            /// Contains configuration settings.
324            /// </summary>
325            //private HttpDownloaderProviderData _configuration;
326
327            /**//// <summary>
328            /// Stores the last time a download progress report was issued.
329            /// </summary>
330            private DateTime _lastProgressReport;
331
332            /**//// <summary>
333            /// The delegate to invoke to report download progress.
334            /// </summary>
335            private OnDownloadProgressEventHandler _progressDelegate;
336
337            /**//// <summary>
338            /// The delegate to invoke to report that file size calculations have started.
339            /// </summary>
340            private OnDownloadTotalSizeCalculationStartedEventHandler _totalSizeStarted;
341
342            /**//// <summary>
343            /// The delegate to invoke to report file size calculations progress.
344            /// </summary>
345            private OnDownloadTotalSizeCalculationProgressEventHandler _totalSizeProgress;
346
347            /**//// <summary>
348            /// The delegate to invoke to report that file size calculations have completed.
349            /// </summary>
350            private OnDownloadTotalSizeCalculationCompletedEventHandler _totalSizeCompleted;
351
352            /**//// <summary>
353            /// The delegate to invoke to report that the download has completed.
354            /// </summary>
355            private OnDownloadCompletedEventHandler _downloadCompleted;
356
357            /**//// <summary>
358            /// The buffer used whilst downloading data.
359            /// </summary>
360            private byte[] _buffer;
361
362            /**//// <summary>
363            /// Set to <c>true</c> if the download completes successfully.
364            /// </summary>
365            private bool _isComplete;
366
367            /**//// <summary>
368            /// Any exception that occurred during the download.
369            /// </summary>
370            private Exception _exception;
371
372            /**//// <summary>
373            /// Synchronisation object.
374            /// </summary>
375            private readonly object LOCK;
376
377            /**//// <summary>
378            /// Gets or sets a value indicating whether the download completed successfully.
379            /// </summary>
380            internal bool IsComplete
381            {
382                get
383                {
384                    lock (LOCK)
385                    {
386                        return _isComplete;
387                    }
388                }
389                set
390                {
391                    lock (LOCK)
392                    {
393                        _isComplete = value;
394                    }
395                }
396            }
397
398            /**//// <summary>
399            /// Gets or sets an exception that occurred during the download process.
400            /// </summary>
401            internal Exception Exception
402            {
403                get
404                {
405                    lock (LOCK)
406                    {
407                        return _exception;
408                    }
409                }
410                set
411                {
412                    lock (LOCK)
413                    {
414                        _exception = value;
415                    }
416                }
417            }
418
419            /**//// <summary>
420            /// Constructs an <c>AsyncDownloader</c> instance.
421            /// </summary>
422            internal AsyncDownloader(UpdaterTask task, OnDownloadProgressEventHandler progressDelegate, OnDownloadTotalSizeCalculationStartedEventHandler totalSizeStarted, OnDownloadTotalSizeCalculationProgressEventHandler totalSizeProgress, OnDownloadTotalSizeCalculationCompletedEventHandler totalSizeCompleted, OnDownloadCompletedEventHandler downloadCompleted)
423            {
424                LOCK = new object();
425                _task = task;
426                //_configuration = configuration;
427                _progressDelegate = progressDelegate;
428                _totalSizeStarted = totalSizeStarted;
429                _totalSizeProgress = totalSizeProgress;
430                _totalSizeCompleted = totalSizeCompleted;
431                _downloadCompleted = downloadCompleted;
432                _buffer = new byte[1024];
433                _lastProgressReport = DateTime.MinValue;
434            }
435
436            /**//// <summary>
437            /// Performs the download operation.
438            /// </summary>
439            internal void Download()
440            {
441                long totalBytes = 0;
442                long transferredBytes = 0;
443                WebProxy webProxy = WebProxy.GetDefaultProxy();
444
445                if (webProxy != null)
446                {
447                    //not sure why this isn't default behaviour but it isn't. This ensures the downloader works when used from behind a proxy that requires authentication (assuming
448                    //authentication information is set up in IE)
449                    webProxy.Credentials = CredentialCache.DefaultCredentials;
450                }
451
452                try
453                {
454                    _totalSizeStarted(new TaskEventArgs(_task));
455
456                    //first determine the total content length
457                    for (int i = 0; i < _task.Manifest.Files.Count; ++i)
458                    {
459                        FileManifest file = _task.Manifest.Files[i];
460                        string uri = GetUri(file);
461                        WebRequest webRequest = WebRequest.Create(uri);
462                        webRequest.Proxy = webProxy;
463                        webRequest.Method = "GET";
464                        WebResponse webResponse = webRequest.GetResponse();
465                        totalBytes += webResponse.ContentLength;
466                        webResponse.Close();
467                        _totalSizeProgress(new DownloadTotalSizeCalculationProgressEventArgs(_task.Manifest.Files.Count, i + 1));
468                    }
469
470                    _totalSizeCompleted(new TaskEventArgs(_task));
471
472                    //now download each file
473                    for (int i = 0; i < _task.Manifest.Files.Count; ++i)
474                    {
475                        FileManifest file = _task.Manifest.Files[i];
476                        string uri = GetUri(file);
477                        WebRequest webRequest = WebRequest.Create(uri);
478                        webRequest.Proxy = webProxy;
479                        WebResponse webResponse = webRequest.GetResponse();
480                        string outFile = Path.Combine(_task.DownloadFilesBase, file.Source);
481                        int read = 0;
482
483                        //make sure the destination directory exists
484                        if (!Directory.Exists(Path.GetDirectoryName(outFile)))
485                        {
486                            Directory.CreateDirectory(Path.GetDirectoryName(outFile));
487                        }
488
489                        using (Stream responseStream = webResponse.GetResponseStream())
490                        using (Stream fileStream = new FileStream(outFile, FileMode.Create, FileAccess.Write))
491                        {
492                            while ((read = responseStream.Read(_buffer, 0, _buffer.Length)) != 0)
493                            {
494                                transferredBytes += read;
495                                fileStream.Write(_buffer, 0, read);
496                                TimeSpan timeSinceLastProgressReport = DateTime.Now - _lastProgressReport;
497
498                                //if ((_configuration.DownloadProgressMaximumFrequency == 0) || (timeSinceLastProgressReport.TotalMilliseconds > _configuration.DownloadProgressMaximumFrequency))
499                                //{
500                                //    _lastProgressReport = DateTime.Now;
501                                //    _progressDelegate(new DownloadTaskProgressEventArgs(totalBytes, transferredBytes, _task.Manifest.Files.Count, i, _task));
502                                //}
503                            }
504
505                            //final progress report
506                            _progressDelegate(new DownloadTaskProgressEventArgs(totalBytes, transferredBytes, _task.Manifest.Files.Count, i, _task));
507                        }
508
509                        webResponse.Close();
510                    }
511                }
512                catch (Exception e)
513                {
514                    if (!(e is ThreadAbortException))
515                    {
516                        Exception = e;
517                    }
518                }
519
520                //fire the complete event if no error occurred
521                if (Exception == null)
522                {
523                    _downloadCompleted(new TaskEventArgs(_task));
524                }
525
526                //if the thread is aborted, this won't execute because the ThreadAbortException will continue propogating
527                IsComplete = true;
528            }
529
530            /**//// <summary>
531            /// Obtains a URI for the specified file.
532            /// </summary>
533            private string GetUri(FileManifest file)
534            {
535                return string.Format("{0}{1}", _task.Manifest.Files.Base, file.Source);
536            }
537        }
538    }
539}
540

HttpDownloaderProviderData
  1using System;
  2using System.Xml.Serialization;
  3using Microsoft.ApplicationBlocks.Updater.Configuration;
  4using Microsoft.ApplicationBlocks.Updater.Downloaders;
  5using Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ObjectBuilder;
  6using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
  7using System.Configuration;
  8using Microsoft.ApplicationBlocks.Updater;
  9namespace x.HttpDownloader
 10{
 11    /**//// <summary>
 12    /// Contains configuration for the <see cref="HttpDownloader"/>.
 13    /// </summary>
 14    //[XmlRoot("downloader", Namespace = ApplicationUpdaterSettings.ConfigurationNamespace)]
 15    [Assembler(typeof(HttpDownloaderAssembler))]
 16    public class HttpDownloaderProviderData : DownloaderProviderData
 17    {
 18        /**//// <summary>
 19        /// See <see cref="DownloadBufferSize"/>.
 20        /// </summary>
 21        private int _downloadBufferSize;
 22
 23        /**//// <summary>
 24        /// See <see cref="DownloadProgressMaximumFrequency"/>
 25        /// </summary>
 26        private int _downloadProgressMaximumProgress;
 27
 28        /**//// <summary>
 29        /// The minimum value that can be assigned to <see cref="DownloadBufferSize"/>.
 30        /// </summary>
 31        private const int DOWNLOAD_BUFFER_SIZE_MIN = 256;
 32
 33        /**//// <summary>
 34        /// The maximum value that can be assigned to <see cref="DownloadBufferSize"/>.
 35        /// </summary>
 36        private const int DOWNLOAD_BUFFER_SIZE_MAX = 10240;
 37
 38        /**//// <summary>
 39        /// The minimum value that can be assigned to <see cref="DownloadProgressMaximumFrequency"/>.
 40        /// </summary>
 41        private const int DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MIN = 0;
 42        
 43        /**//// <summary>
 44        /// The maximum value that can be assigned to <see cref="DownloadProgressMaximumFrequency"/>.
 45        /// </summary>
 46        private const int DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MAX = 5000;
 47
 48        /**//// <summary>
 49        /// Gets or sets the buffer size, in bytes, used whilst downloading files.
 50        /// </summary>
 51        /// <remarks>
 52        /// The HTTP downloader reports progress each time it fills the download buffer. Therefore, larger buffer sizes will result
 53        /// in fewer progress reports.
 54        /// </remarks>
 55        //[ConfigurationProperty(_downloadBufferSize, IsRequired = false)]
 56        public int DownloadBufferSize
 57        {
 58            get
 59            {
 60                return _downloadBufferSize;
 61            }
 62            set
 63            {
 64                if ((value < DOWNLOAD_BUFFER_SIZE_MIN) || (value > DOWNLOAD_BUFFER_SIZE_MAX))
 65                {
 66                    throw new ArgumentException(string.Format("DownloadBufferSize must be between {0} and {1}", DOWNLOAD_BUFFER_SIZE_MIN, DOWNLOAD_BUFFER_SIZE_MAX));
 67                }
 68
 69                _downloadBufferSize = value;
 70            }
 71        }
 72
 73        /**//// <summary>
 74        /// Gets or sets the maximum frequency, in milliseconds, that progress will be reported by the HTTP downloader.
 75        /// </summary>
 76        /// <remarks>
 77        /// <para>
 78        /// This property allows you to limit the number of progress reports issued by the HTTP downloader. The downloader will ensure that
 79        /// the amount of time specified by this property has elapsed prior to issuing another progress report. If enough time has not elapsed
 80        /// then the downloader will not issue a progress report at that time.
 81        /// </para>
 82        /// <para>
 83        /// Setting this property to <c>0</c> ensures that the downloader always reports progress, regardless of the amount of time that has
 84        /// elapsed since the last progress report.
 85        /// </para>
 86        /// </remarks>
 87        //[XmlElement("downloadProgressMaximumFrequency")]
 88        public int DownloadProgressMaximumFrequency
 89        {
 90            get
 91            {
 92                return _downloadProgressMaximumProgress;
 93            }
 94            set
 95            {
 96                if ((value < DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MIN) || (value > DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MAX))
 97                {
 98                    throw new ArgumentException(string.Format("DownloadProgressMaximumFrequency must be between {0} and {1}", DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MIN, DOWNLOAD_PROGRESS_MAXIMUM_FREQUENCY_MAX));
 99                }
100
101                _downloadProgressMaximumProgress = value;
102            }
103        }
104
105        /**//// <summary>
106        /// Default constructor.
107        /// </summary>
108        public HttpDownloaderProviderData()
109        {
110            DownloadBufferSize = 1024;
111        }
112    }
113
114    public class HttpDownloaderAssembler : IAssembler<Microsoft.ApplicationBlocks.Updater.IDownloader, DownloaderProviderData>
115    {
116        public IDownloader Assemble(Microsoft.Practices.ObjectBuilder.IBuilderContext context, DownloaderProviderData objectConfiguration, IConfigurationSource configurationSource, ConfigurationReflectionCache reflectionCache)
117        {
118            HttpDownloaderProviderData bitsData = (HttpDownloaderProviderData)objectConfiguration;
119            return new HttpDownloader();
120        }
121    }
122}
123