na-get-lib/NaGet.Net/Downloader.cs

   1 using System;\r
   2 using System.Net;\r
   3 using System.IO;\r
   4 using System.Collections;\r
   5 using System.Threading;\r
   6 using NaGet.SubCommands;\r
   7 \r
   8 namespace NaGet.Net\r
   9 {\r
  10 \r
  11 /// <summary>\r
  12 /// ダウンロードイベントオブジェクト\r
  13 /// </summary>\r
  14 public class DownloadEventArgs : NaGetEventArgs\r
  15 {\r
  16         /// <summary>\r
  17         /// イベントの種類\r
  18         /// </summary>\r
  19         public DownloadEventType Type;\r
  20 \r
  21         /// <summary>\r
  22         /// ダウンロード済みのバイト数\r
  23         /// </summary>\r
  24         public long DownloadSize;\r
  25 \r
  26         /// <summary>\r
  27         /// ダウンロードする総バイト数\r
  28         /// </summary>\r
  29         public long MaxSize;\r
  30         \r
  31         /// <summary>\r
  32         /// コンストラクタ\r
  33         /// </summary>\r
  34         /// <param name="type">イベントの種類</param>\r
  35         /// <param name="msg">イベントメッセージ</param>\r
  36         /// <param name="pos">ダウンロード済みのバイト数</param>\r
  37         /// <param name="max">ダウンロードする総バイト数</param>\r
  38         public DownloadEventArgs(DownloadEventType type, string msg, long pos, long max)\r
  39         {\r
  40                 Type = type;\r
  41                 DownloadSize = pos;\r
  42                 MaxSize = max;\r
  43                 \r
  44                 TaskMessage = msg;\r
  45                 TaskProgressPercent = (max > 0)? (100.0f * pos / max) : -1;\r
  46         }\r
  47 }\r
  48 \r
  49 /// <summary>\r
  50 /// DownloadEventArgsでのイベントの種類\r
  51 /// </summary>\r
  52 public enum DownloadEventType {\r
  53         INITED,\r
  54         CONNECTED,\r
  55         STARTED,\r
  56         DOWNLOADING,\r
  57         ERROR,\r
  58         COMPLETED\r
  59 }\r
  60 \r
  61 /// <summary>\r
  62 /// ダウンロード処理を行うクラス\r
  63 /// </summary>\r
  64 public class Downloader : NaGetTask\r
  65 {\r
  66         /// <summary>\r
  67         /// デフォルトで使うプロキシ\r
  68         /// </summary>\r
  69         public static IWebProxy DefaultProxy = WebRequest.GetSystemWebProxy();\r
  70         \r
  71         /// <summary>\r
  72         /// 通信に使うプロキシ\r
  73         /// </summary>\r
  74         public IWebProxy Proxy;\r
  75         \r
  76         /// <summary>\r
  77         /// イベントハンドラ\r
  78         /// </summary>\r
  79         public event EventHandler<DownloadEventArgs> DownloadEventRaised;\r
  80         \r
  81         /// <summary>\r
  82         /// アクセスURL\r
  83         /// </summary>\r
  84         protected string url;\r
  85         \r
  86         /// <summary>\r
  87         /// 保存先\r
  88         /// </summary>\r
  89         protected string filepath;\r
  90         \r
  91         /// <summary>\r
  92         /// リクエストオブジェクト\r
  93         /// </summary>\r
  94         protected WebRequest request;\r
  95         \r
  96         /// <summary>\r
  97         /// レスポンスオブジェクト。応答がくるまではnullである。\r
  98         /// </summary>\r
  99         protected WebResponse response;\r
 100         \r
 101         /// <summary>\r
 102         /// ダウンロード要求時のキャッシュレベル。デフォルトではキャッシュ無視\r
 103         /// </summary>\r
 104         public System.Net.Cache.RequestCacheLevel CacheLevel = System.Net.Cache.RequestCacheLevel.NoCacheNoStore;\r
 105         \r
 106         private bool cancelCalled = false;\r
 107         \r
 108         private bool done = false;\r
 109         \r
 110         /// <summary>\r
 111         /// ダウンロード時にHTTPヘッダなどから取得した本来のファイル名\r
 112         /// </summary>\r
 113         private string downloadedFileName = null;\r
 114         \r
 115         /// <summary>\r
 116         /// ダウンロード時にHTTPヘッダなどから取得した本来のファイル名\r
 117         /// </summary>\r
 118         public string DownloadedFileName {\r
 119                 get { return downloadedFileName; }\r
 120         }\r
 121         \r
 122         /* ダウンロードの処理時間計測器 */\r
 123         private System.Diagnostics.Stopwatch stopwatch;\r
 124 \r
 125         /// <summary>\r
 126         /// ダウンロードを行う\r
 127         /// </summary>\r
 128         /// <param name="url">ダウンロードするリソースのURL</param>\r
 129         /// <param name="filepath">保存先ファイルパス</param>\r
 130         public void Download(string url, string filepath)\r
 131         {\r
 132                 this.url = url;\r
 133                 this.filepath = filepath;\r
 134                 \r
 135                 try {\r
 136                         Run();\r
 137                 } catch (NotSupportedException e) {\r
 138                         throw new NotSupportedException("Not supported download location for downloader.", e);\r
 139                 }\r
 140         }\r
 141         \r
 142         public override bool Done {\r
 143                 get { return done; }\r
 144         }\r
 145         \r
 146         public override bool Running {\r
 147                 get { return request != null && (!done); }\r
 148         }\r
 149 \r
 150         public override void Run()\r
 151         {\r
 152                 RaiseDownloadEvent(DownloadEventType.INITED, 0, -1);\r
 153                 \r
 154                 try {\r
 155                         request = WebRequest.Create(url);\r
 156                         request.Proxy = (Proxy == null)? DefaultProxy : Proxy;\r
 157                         request.CachePolicy = new System.Net.Cache.RequestCachePolicy(CacheLevel);\r
 158                         \r
 159                         if (cancelCalled) {\r
 160                                 throw new NaGetTaskCanceledException(string.Empty);\r
 161                         }\r
 162                         \r
 163                         try {\r
 164                                 response = request.GetResponse();\r
 165                         } catch (WebException e) {\r
 166                                 if (cancelCalled) { // キャンセル時\r
 167                                         throw new NaGetTaskCanceledException(string.Empty, e);\r
 168                                 } else {\r
 169                                         throw new WebException(e.Message, e);\r
 170                                 }\r
 171                         }\r
 172                         \r
 173                         if (cancelCalled) {\r
 174                                 throw new NaGetTaskCanceledException(string.Empty);\r
 175                         }\r
 176                         \r
 177                         try {\r
 178                                 downloadedFileName = getFileNameFromWebResponse(response);\r
 179                         } catch (Exception) {\r
 180                         }\r
 181                         \r
 182                         if (File.Exists(filepath)) { // ファイルが存在するとき削除\r
 183                                 File.Delete(filepath);\r
 184                         }\r
 185                         \r
 186                         RaiseDownloadEvent(DownloadEventType.CONNECTED, 0, -1);\r
 187                         \r
 188                         using (Stream stream = response.GetResponseStream() )\r
 189                         using (FileStream fs = new FileStream(filepath,\r
 190                                                     FileMode.Create,\r
 191                                                     FileAccess.Write) ) {\r
 192                                 try {\r
 193                                         File.SetAttributes(filepath, FileAttributes.Hidden);\r
 194                                         long contentLength = response.ContentLength;\r
 195         \r
 196                                         RaiseDownloadEvent(DownloadEventType.STARTED, 0, contentLength);\r
 197                                         \r
 198                                         stopwatch = new System.Diagnostics.Stopwatch();\r
 199                                         stopwatch.Start();\r
 200         \r
 201                                         Timer timer = new Timer(new TimerCallback(\r
 202                                                 delegate(object obj) {\r
 203                                                         try {\r
 204                                                                 RaiseDownloadEvent(DownloadEventType.DOWNLOADING, fs.Position, contentLength);\r
 205                                                         } catch (ObjectDisposedException) {\r
 206                                                         }\r
 207                                                 }), null, 0, 1000);\r
 208                                         \r
 209                                         try {\r
 210                                                 byte[] data = new byte[4096];\r
 211                                                 int size = 0;\r
 212                                                 while ((size = stream.Read(data,0,data.Length)) > 0) {\r
 213                                                         fs.Write(data, 0, size);\r
 214                                                         \r
 215                                                         if (cancelCalled) {\r
 216                                                                 throw new NaGetTaskCanceledException(string.Empty);\r
 217                                                         }\r
 218                                                 }\r
 219                                         } finally {\r
 220                                                 timer.Dispose();\r
 221                                         }\r
 222                                         \r
 223                                         File.SetAttributes(filepath, FileAttributes.Normal);\r
 224                                         \r
 225                                         RaiseDownloadEvent(DownloadEventType.COMPLETED, fs.Position, contentLength);\r
 226                                 } catch (IOException ex) {\r
 227                                         if (cancelCalled) {\r
 228                                                 throw new NaGetTaskCanceledException(string.Empty);\r
 229                                         } else {\r
 230                                                 RaiseDownloadEvent(DownloadEventType.ERROR, 0, 0);\r
 231                                                 throw new IOException(ex.Message, ex);\r
 232                                         }\r
 233                                 } finally {\r
 234                                         if (stopwatch != null) {\r
 235                                                 stopwatch.Stop();\r
 236                                                 stopwatch = null;\r
 237                                         }\r
 238                                 }\r
 239                         }\r
 240                         \r
 241                         // 更新日を補完\r
 242                         if (File.Exists(filepath)) {\r
 243                                 if (response is HttpWebResponse) {\r
 244                                         File.SetLastWriteTime(filepath, ((HttpWebResponse) response).LastModified);\r
 245                                 } else if (response is FtpWebResponse) {\r
 246                                         File.SetLastWriteTime(filepath, ((FtpWebResponse) response).LastModified);\r
 247                                 }\r
 248                         }\r
 249                 } finally {\r
 250                         if (response != null) {\r
 251                                 response.Close();\r
 252                         }\r
 253                         \r
 254                         request = null;\r
 255                         done = true;\r
 256                 }\r
 257         }\r
 258         \r
 259         protected void RaiseDownloadEvent(DownloadEventType type, long pos, long max)\r
 260         {\r
 261                 if (DownloadEventRaised != null) {\r
 262                         DownloadEventArgs e = new DownloadEventArgs(type, string.Empty, pos, max);\r
 263                         \r
 264                         switch (e.Type) {\r
 265                                 case DownloadEventType.CONNECTED:\r
 266                                         e.TaskMessage = "接続しました";\r
 267                                         break;\r
 268                                 case DownloadEventType.STARTED:\r
 269                                 case DownloadEventType.DOWNLOADING:\r
 270                                 case DownloadEventType.COMPLETED:\r
 271                                         if (e.TaskProgressPercent >= 0) {\r
 272                                                 e.TaskMessage = string.Format("{0} bytes ({1} %)", e.DownloadSize, (int) e.TaskProgressPercent);\r
 273                                         } else {\r
 274                                                 e.TaskMessage = string.Format("{0} bytes", e.DownloadSize);\r
 275                                         }\r
 276                                         \r
 277                                         \r
 278                                         if (stopwatch != null && stopwatch.IsRunning && stopwatch.ElapsedMilliseconds > 3000) {\r
 279                                                 long bpers = e.DownloadSize * 1000 / stopwatch.ElapsedMilliseconds;\r
 280                                                 if ((e.TaskProgressPercent >= 0) && (bpers > 0)) {\r
 281                                                         TimeSpan rest = TimeSpan.FromSeconds((max - e.DownloadSize) / bpers);\r
 282                                                         e.TaskMessage += string.Format(" 推定残り時間:{0} ({1}/s)", rest, NaGet.Utils.FormatSize(bpers));\r
 283                                                 } else {\r
 284                                                         e.TaskMessage += string.Format(" ({0}/s)", NaGet.Utils.FormatSize(bpers));\r
 285                                                 }\r
 286                                         }\r
 287                                         \r
 288                                         break;\r
 289                         }\r
 290                         \r
 291                         DownloadEventRaised(this, e);\r
 292                 }\r
 293         }\r
 294         \r
 295         public override bool Cancelable {\r
 296                 get { return !(this.Done || cancelCalled); }\r
 297         }\r
 298         \r
 299         public override bool Cancel()\r
 300         {\r
 301                 if (this.Done || cancelCalled) {\r
 302                         return false;\r
 303                 }\r
 304                 \r
 305                 cancelCalled = true;\r
 306                 if (request != null) {\r
 307                         try {\r
 308                                 request.Abort();\r
 309                         } catch (WebException) {\r
 310                         }\r
 311                 }\r
 312                 return true;\r
 313         }\r
 314         \r
 315         /// <summary>\r
 316         /// Webレスポンスからダウンロードしたファイルの名前を取得\r
 317         /// </summary>\r
 318         /// <param name="response"></param>\r
 319         /// <returns></returns>\r
 320         private string getFileNameFromWebResponse(WebResponse response)\r
 321         {\r
 322                 if (response is HttpWebResponse) {\r
 323                         string contentDisposition = ((HttpWebResponse) response).Headers["Content-Disposition"];\r
 324                         \r
 325                         // TODO check license for http://www.atmarkit.co.jp/fdotnet/dotnettips/618downnoname/downnoname.html\r
 326                         if (! string.IsNullOrEmpty(contentDisposition)) {\r
 327                                 System.Text.RegularExpressions.Regex re = new System.Text.RegularExpressions.Regex(\r
 328                                         @"filename\s*=\s*(?:""(?<filename>[^""]*)""|(?<filename>[^;]*))",\r
 329                                         System.Text.RegularExpressions.RegexOptions.IgnoreCase);\r
 330                                 \r
 331                                 System.Text.RegularExpressions.Match m = re.Match(contentDisposition);\r
 332                                 if (m.Success) {\r
 333                                         return m.Groups["filename"].Value;\r
 334                                 }\r
 335                         }\r
 336                 }\r
 337                 \r
 338                 return NaGet.Utils.Url2filename(response.ResponseUri.ToString());\r
 339         }\r
 340 }\r
 341 \r
 342 }\r
 343 \r
 344 \r