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.Collections.Generic;\r
   9 using System.ComponentModel;\r
  10 using System.Data;\r
  11 using System.Drawing;\r
  12 using System.Text;\r
  13 using System.Windows.Forms;\r
  14 using System.Net;\r
  15 using System.IO;\r
  16 using System.Threading;\r
  17 using System.Diagnostics;\r
  18 \r
  19 namespace Handbrake\r
  20 {\r
  21     public partial class frmDownload : Form\r
  22     {\r
  23         private Thread downloadThread;\r
  24         private Stream responceStream;\r
  25         private Stream loacalStream;\r
  26         private HttpWebRequest webRequest;\r
  27         private HttpWebResponse webResponse;\r
  28         private static int progress;\r
  29         private delegate void UpdateProgessCallback(Int64 BytesRead, Int64 TotalBytes);\r
  30         private delegate void DownloadCompleteCallback();\r
  31         private delegate void DownloadFailedCallback();\r
  32 \r
  33 \r
  34         public frmDownload()\r
  35         {\r
  36             InitializeComponent();\r
  37 \r
  38             try\r
  39             {\r
  40                 downloadThread = new Thread(Download);\r
  41                 downloadThread.Start();\r
  42             }\r
  43             catch (Exception exc)\r
  44             {\r
  45                 MessageBox.Show("An error occured on the Download Thread \n" + exc.ToString(),"Error",MessageBoxButtons.OK, MessageBoxIcon.Error);\r
  46             }\r
  47         }\r
  48 \r
  49         private void Download()\r
  50         {\r
  51             Functions.AppcastReader rssRead = new Functions.AppcastReader();\r
  52 \r
  53             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
  54 \r
  55             if (File.Exists(tempPath))\r
  56                 File.Delete(tempPath);\r
  57 \r
  58             string hbUpdate = rssRead.downloadFile();\r
  59 \r
  60             WebClient wcDownload = new WebClient();\r
  61                 try\r
  62                 {\r
  63                     webRequest = (HttpWebRequest)WebRequest.Create(hbUpdate);\r
  64                     webRequest.Credentials = CredentialCache.DefaultCredentials;\r
  65                     webResponse = (HttpWebResponse)webRequest.GetResponse();\r
  66                     Int64 fileSize = webResponse.ContentLength;\r
  67 \r
  68                     responceStream = wcDownload.OpenRead(hbUpdate);\r
  69                     loacalStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);\r
  70 \r
  71                     int bytesSize = 0;\r
  72                     byte[] downBuffer = new byte[2048];\r
  73 \r
  74                     long flength = 0;\r
  75                     while ((bytesSize = responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)\r
  76                     {\r
  77                         loacalStream.Write(downBuffer, 0, bytesSize);\r
  78                         flength = loacalStream.Length;\r
  79                         this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { loacalStream.Length, fileSize });\r
  80                     }\r
  81 \r
  82                     responceStream.Close();\r
  83                     loacalStream.Close();\r
  84 \r
  85                     if (flength != fileSize)\r
  86                         this.Invoke(new DownloadFailedCallback(this.downloadFailed));\r
  87                     else\r
  88                         this.Invoke(new DownloadCompleteCallback(this.downloadComplete));\r
  89                 }\r
  90                 catch (Exception)\r
  91                 {\r
  92                     // Do Nothing \r
  93                 }\r
  94         }\r
  95 \r
  96         private void UpdateProgress(Int64 BytesRead, Int64 TotalBytes)\r
  97         {\r
  98             try\r
  99             {\r
 100                 long p = (BytesRead * 100) / TotalBytes;\r
 101                 progress = int.Parse(p.ToString());\r
 102                 progress_download.Value = progress;\r
 103                 lblProgress.Text = (BytesRead / 1024) + "k of " + (TotalBytes / 1024) + "k ";\r
 104             }\r
 105             catch (Exception exc)\r
 106             {\r
 107                 MessageBox.Show("Integer Convertion Error On Download \n" + exc.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);\r
 108             }\r
 109         }\r
 110 \r
 111         private void downloadComplete()\r
 112         {\r
 113             lblProgress.Text = "Download Complete";\r
 114             btn_cancel.Text = "Close";\r
 115 \r
 116             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
 117 \r
 118             Process startInstall = Process.Start(tempPath);\r
 119             this.Close();\r
 120             Application.Exit();\r
 121         }\r
 122 \r
 123         private void downloadFailed()\r
 124         {\r
 125             lblProgress.Text = "Download Failed";\r
 126             btn_cancel.Text = "Close";\r
 127         }\r
 128 \r
 129         private void btn_cancel_Click(object sender, EventArgs e)\r
 130         {\r
 131             try\r
 132             {\r
 133                 webResponse.Close();\r
 134                 responceStream.Close();\r
 135                 loacalStream.Close();\r
 136                 downloadThread.Abort();\r
 137                 progress_download.Value = 0;\r
 138                 lblProgress.Text = "Download Stopped";\r
 139                 this.Close();\r
 140             }\r
 141             catch (Exception)\r
 142             {\r
 143                 // Do nothing\r
 144             }\r
 145         }\r
 146     }\r
 147 }