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 using System;\r
   8 using System.Windows.Forms;\r
   9 using System.Net;\r
  10 using System.IO;\r
  11 using System.Threading;\r
  12 using System.Diagnostics;\r
  13 \r
  14 namespace Handbrake\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 Boolean _killThread;\r
  25         private delegate void UpdateProgessCallback(Int64 bytesRead, Int64 totalBytes);\r
  26         private delegate void DownloadCompleteCallback();\r
  27         private delegate void DownloadFailedCallback();\r
  28 \r
  29 \r
  30         public frmDownload(string filename)\r
  31         {\r
  32             InitializeComponent();\r
  33 \r
  34             _downloadThread = new Thread(Download);\r
  35             _downloadThread.Start(filename);\r
  36         }\r
  37 \r
  38         private void Download(object file)\r
  39         {\r
  40             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
  41             string hbUpdate = (string)file;\r
  42             WebClient wcDownload = new WebClient();\r
  43 \r
  44             try\r
  45             {\r
  46                 if (File.Exists(tempPath))\r
  47                     File.Delete(tempPath);\r
  48 \r
  49                 _webRequest = (HttpWebRequest)WebRequest.Create(hbUpdate);\r
  50                 _webRequest.Credentials = CredentialCache.DefaultCredentials;\r
  51                 _webResponse = (HttpWebResponse)_webRequest.GetResponse();\r
  52                 Int64 fileSize = _webResponse.ContentLength;\r
  53 \r
  54                 _responceStream = wcDownload.OpenRead(hbUpdate);\r
  55                 _loacalStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);\r
  56 \r
  57                 int bytesSize;\r
  58                 byte[] downBuffer = new byte[2048];\r
  59 \r
  60                 long flength = 0;\r
  61                 while ((bytesSize = _responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)\r
  62                 {\r
  63                     if (_killThread)\r
  64                         return;\r
  65                     _loacalStream.Write(downBuffer, 0, bytesSize);\r
  66                     flength = _loacalStream.Length;\r
  67                     Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { _loacalStream.Length, fileSize });\r
  68                 }\r
  69 \r
  70                 _responceStream.Close();\r
  71                 _loacalStream.Close();\r
  72 \r
  73                 if (flength != fileSize)\r
  74                     Invoke(new DownloadFailedCallback(this.DownloadFailed));\r
  75                 else\r
  76                     Invoke(new DownloadCompleteCallback(this.DownloadComplete));\r
  77             }\r
  78             catch\r
  79             {\r
  80                 // Do Nothing \r
  81             }\r
  82         }\r
  83 \r
  84         private void UpdateProgress(Int64 bytesRead, Int64 totalBytes)\r
  85         {\r
  86             long p = (bytesRead * 100) / totalBytes;\r
  87             int.TryParse(p.ToString(), out _progress);\r
  88             progress_download.Value = _progress;\r
  89             lblProgress.Text = (bytesRead / 1024) + "k of " + (totalBytes / 1024) + "k ";\r
  90         }\r
  91 \r
  92         private void DownloadComplete()\r
  93         {\r
  94             lblProgress.Text = "Download Complete";\r
  95             btn_cancel.Text = "Close";\r
  96 \r
  97             Process.Start(Path.Combine(Path.GetTempPath(), "handbrake-setup.exe"));\r
  98             this.Close();\r
  99             Application.Exit();\r
 100         }\r
 101 \r
 102         private void DownloadFailed()\r
 103         {\r
 104             lblProgress.Text = "Download Failed";\r
 105             btn_cancel.Text = "Close";\r
 106         }\r
 107 \r
 108         private void btn_cancel_Click(object sender, EventArgs e)\r
 109         {\r
 110             _killThread = true;\r
 111             lblProgress.Text = "Cancelling ...";\r
 112             if (_webResponse != null) _webResponse.Close();\r
 113             if (_responceStream != null) _responceStream.Close();\r
 114             if (_loacalStream != null) _loacalStream.Close();\r
 115             this.Close();\r
 116         }\r
 117     }\r
 118 }