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 delegate void UpdateProgessCallback(Int64 BytesRead, Int64 TotalBytes);\r
  25         private delegate void DownloadCompleteCallback();\r
  26         private delegate void DownloadFailedCallback();\r
  27 \r
  28         private string file;\r
  29 \r
  30         public frmDownload(string filename)\r
  31         {\r
  32             InitializeComponent();\r
  33 \r
  34             file = filename;\r
  35             downloadThread = new Thread(Download);\r
  36             downloadThread.Start();\r
  37         }\r
  38 \r
  39         private void Download()\r
  40         {\r
  41             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
  42             string hbUpdate = file;\r
  43             WebClient wcDownload = new WebClient();\r
  44 \r
  45             try\r
  46             {\r
  47                 if (File.Exists(tempPath))\r
  48                     File.Delete(tempPath);\r
  49 \r
  50                 webRequest = (HttpWebRequest)WebRequest.Create(hbUpdate);\r
  51                 webRequest.Credentials = CredentialCache.DefaultCredentials;\r
  52                 webResponse = (HttpWebResponse)webRequest.GetResponse();\r
  53                 Int64 fileSize = webResponse.ContentLength;\r
  54 \r
  55                 responceStream = wcDownload.OpenRead(hbUpdate);\r
  56                 loacalStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);\r
  57 \r
  58                 int bytesSize;\r
  59                 byte[] downBuffer = new byte[2048];\r
  60 \r
  61                 long flength = 0;\r
  62                 while ((bytesSize = responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)\r
  63                 {\r
  64                     loacalStream.Write(downBuffer, 0, bytesSize);\r
  65                     flength = loacalStream.Length;\r
  66                     Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { loacalStream.Length, fileSize });\r
  67                 }\r
  68 \r
  69                 responceStream.Close();\r
  70                 loacalStream.Close();\r
  71 \r
  72                 if (flength != fileSize)\r
  73                     Invoke(new DownloadFailedCallback(this.downloadFailed));\r
  74                 else\r
  75                     Invoke(new DownloadCompleteCallback(this.downloadComplete));\r
  76             }\r
  77             catch (Exception)\r
  78             {\r
  79                 // Do Nothing \r
  80             }\r
  81         }\r
  82 \r
  83         private void UpdateProgress(Int64 BytesRead, Int64 TotalBytes)\r
  84         {\r
  85             try\r
  86             {\r
  87                 long p = (BytesRead * 100) / TotalBytes;\r
  88                 progress = int.Parse(p.ToString());\r
  89                 progress_download.Value = progress;\r
  90                 lblProgress.Text = (BytesRead / 1024) + "k of " + (TotalBytes / 1024) + "k ";\r
  91             }\r
  92             catch (Exception exc)\r
  93             {\r
  94                 MessageBox.Show("Integer Conversion Error On Download \n" + exc, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);\r
  95             }\r
  96         }\r
  97 \r
  98         private void downloadComplete()\r
  99         {\r
 100             lblProgress.Text = "\83_\83E\83\93\83\8d\81[\83h\8a®\97¹";\r
 101             btn_cancel.Text = "\95Â\82¶\82é";\r
 102 \r
 103             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
 104             Process.Start(tempPath);\r
 105             this.Close();\r
 106             Application.Exit();\r
 107         }\r
 108 \r
 109         private void downloadFailed()\r
 110         {\r
 111             lblProgress.Text = "\83_\83E\83\93\83\8d\81[\83h\8e¸\94s";\r
 112             btn_cancel.Text = "\95Â\82¶\82é";\r
 113         }\r
 114 \r
 115         private void btn_cancel_Click(object sender, EventArgs e)\r
 116         {\r
 117             try\r
 118             {\r
 119                 webResponse.Close();\r
 120                 responceStream.Close();\r
 121                 loacalStream.Close();\r
 122                 downloadThread.Abort();\r
 123                 progress_download.Value = 0;\r
 124                 lblProgress.Text = "\83_\83E\83\93\83\8d\81[\83h\92â\8e~";\r
 125                 this.Close();\r
 126             }\r
 127             catch (Exception)\r
 128             {\r
 129                 // Do nothing\r
 130             }\r
 131         }\r
 132     }\r
 133 }