win/C#/frmDownload.cs

   1 /*  frmDownload.cs $\r
   2         \r
   3            This file is part of the HandBrake source code.\r
   4            Homepage: <http://handbrake.fr>.\r
   5            It may be used under the terms of the GNU General Public License. */\r
   6 \r
   7 namespace Handbrake\r
   8 {\r
   9     using System;\r
  10     using System.Diagnostics;\r
  11     using System.IO;\r
  12     using System.Net;\r
  13     using System.Threading;\r
  14     using System.Windows.Forms;\r
  15 \r
  16     public partial class frmDownload : Form\r
  17     {\r
  18         private readonly Thread _downloadThread;\r
  19         private Stream _responceStream;\r
  20         private Stream _loacalStream;\r
  21         private HttpWebRequest _webRequest;\r
  22         private HttpWebResponse _webResponse;\r
  23         private static int _progress;\r
  24         private bool _killThread;\r
  25 \r
  26         private delegate void UpdateProgessCallback(long bytesRead, long totalBytes);\r
  27 \r
  28         private delegate void DownloadCompleteCallback();\r
  29 \r
  30         private delegate void DownloadFailedCallback();\r
  31 \r
  32 \r
  33         public frmDownload(string filename)\r
  34         {\r
  35             InitializeComponent();\r
  36 \r
  37             _downloadThread = new Thread(Download);\r
  38             _downloadThread.Start(filename);\r
  39         }\r
  40 \r
  41         private void Download(object file)\r
  42         {\r
  43             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
  44             string hbUpdate = (string) file;\r
  45             WebClient wcDownload = new WebClient();\r
  46 \r
  47             try\r
  48             {\r
  49                 if (File.Exists(tempPath))\r
  50                     File.Delete(tempPath);\r
  51 \r
  52                 _webRequest = (HttpWebRequest) WebRequest.Create(hbUpdate);\r
  53                 _webRequest.Credentials = CredentialCache.DefaultCredentials;\r
  54                 _webResponse = (HttpWebResponse) _webRequest.GetResponse();\r
  55                 long fileSize = _webResponse.ContentLength;\r
  56 \r
  57                 _responceStream = wcDownload.OpenRead(hbUpdate);\r
  58                 _loacalStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);\r
  59 \r
  60                 int bytesSize;\r
  61                 byte[] downBuffer = new byte[2048];\r
  62 \r
  63                 long flength = 0;\r
  64                 while ((bytesSize = _responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)\r
  65                 {\r
  66                     if (_killThread)\r
  67                         return;\r
  68                     _loacalStream.Write(downBuffer, 0, bytesSize);\r
  69                     flength = _loacalStream.Length;\r
  70                     Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] {_loacalStream.Length, fileSize});\r
  71                 }\r
  72 \r
  73                 _responceStream.Close();\r
  74                 _loacalStream.Close();\r
  75 \r
  76                 if (flength != fileSize)\r
  77                     Invoke(new DownloadFailedCallback(this.DownloadFailed));\r
  78                 else\r
  79                     Invoke(new DownloadCompleteCallback(this.DownloadComplete));\r
  80             }\r
  81             catch\r
  82             {\r
  83                 // Do Nothing \r
  84             }\r
  85         }\r
  86 \r
  87         private void UpdateProgress(long bytesRead, long totalBytes)\r
  88         {\r
  89             long p = (bytesRead*100)/totalBytes;\r
  90             int.TryParse(p.ToString(), out _progress);\r
  91             progress_download.Value = _progress;\r
  92             lblProgress.Text = (bytesRead/1024) + "k of " + (totalBytes/1024) + "k ";\r
  93         }\r
  94 \r
  95         private void DownloadComplete()\r
  96         {\r
  97             lblProgress.Text = "Download Complete";\r
  98             btn_cancel.Text = "Close";\r
  99 \r
 100             Process.Start(Path.Combine(Path.GetTempPath(), "handbrake-setup.exe"));\r
 101             this.Close();\r
 102             Application.Exit();\r
 103         }\r
 104 \r
 105         private void DownloadFailed()\r
 106         {\r
 107             lblProgress.Text = "Download Failed";\r
 108             btn_cancel.Text = "Close";\r
 109         }\r
 110 \r
 111         private void btn_cancel_Click(object sender, EventArgs e)\r
 112         {\r
 113             _killThread = true;\r
 114             lblProgress.Text = "Cancelling ...";\r
 115             if (_webResponse != null) _webResponse.Close();\r
 116             if (_responceStream != null) _responceStream.Close();\r
 117             if (_loacalStream != null) _loacalStream.Close();\r
 118             this.Close();\r
 119         }\r
 120     }\r
 121 }