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.m0k.org/>.\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 \r
  50         private void Download()\r
  51         {\r
  52             Functions.RssReader rssRead = new Functions.RssReader();\r
  53 \r
  54             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
  55 \r
  56             if (File.Exists(tempPath))\r
  57                 File.Delete(tempPath);\r
  58 \r
  59             string hbUpdate = rssRead.downloadFile();\r
  60 \r
  61             WebClient wcDownload = new WebClient();\r
  62                 try\r
  63                 {\r
  64                     webRequest = (HttpWebRequest)WebRequest.Create(hbUpdate);\r
  65                     webRequest.Credentials = CredentialCache.DefaultCredentials;\r
  66                     webResponse = (HttpWebResponse)webRequest.GetResponse();\r
  67                     Int64 fileSize = webResponse.ContentLength;\r
  68 \r
  69                     responceStream = wcDownload.OpenRead(hbUpdate);\r
  70                     loacalStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);\r
  71 \r
  72                     int bytesSize = 0;\r
  73                     byte[] downBuffer = new byte[2048];\r
  74 \r
  75                     long flength = 0;\r
  76                     while ((bytesSize = responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)\r
  77                     {\r
  78                         loacalStream.Write(downBuffer, 0, bytesSize);\r
  79                         flength = loacalStream.Length;\r
  80                         this.Invoke(new UpdateProgessCallback(this.UpdateProgress), new object[] { loacalStream.Length, fileSize });\r
  81                     }\r
  82 \r
  83                     responceStream.Close();\r
  84                     loacalStream.Close();\r
  85 \r
  86                     if (flength != fileSize)\r
  87                         this.Invoke(new DownloadFailedCallback(this.downloadFailed));\r
  88                     else\r
  89                         this.Invoke(new DownloadCompleteCallback(this.downloadComplete));\r
  90                 }\r
  91                 catch (Exception)\r
  92                 {\r
  93                     // Do Nothing \r
  94                 }\r
  95         }\r
  96 \r
  97         private void UpdateProgress(Int64 BytesRead, Int64 TotalBytes)\r
  98         {\r
  99             try\r
 100             {\r
 101                 long p = (BytesRead * 100) / TotalBytes;\r
 102                 progress = int.Parse(p.ToString());\r
 103                 progress_download.Value = progress;\r
 104                 lblProgress.Text = (BytesRead / 1024) + "k of " + (TotalBytes / 1024) + "k ";\r
 105             }\r
 106             catch (Exception exc)\r
 107             {\r
 108                 MessageBox.Show("Integer Convertion Error On Download \n" + exc.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);\r
 109             }\r
 110         }\r
 111 \r
 112         private void downloadComplete()\r
 113         {\r
 114             lblProgress.Text = "Download Complete";\r
 115             btn_cancel.Text = "Close";\r
 116 \r
 117             string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");\r
 118 \r
 119             Process startInstall = Process.Start(tempPath);\r
 120             this.Close();\r
 121             Application.Exit();\r
 122         }\r
 123 \r
 124         private void downloadFailed()\r
 125         {\r
 126             lblProgress.Text = "Download Failed";\r
 127             btn_cancel.Text = "Close";\r
 128         }\r
 129 \r
 130         private void btn_cancel_Click(object sender, EventArgs e)\r
 131         {\r
 132             try\r
 133             {\r
 134                 webResponse.Close();\r
 135                 responceStream.Close();\r
 136                 loacalStream.Close();\r
 137                 downloadThread.Abort();\r
 138                 progress_download.Value = 0;\r
 139                 lblProgress.Text = "Download Stopped";\r
 140                 this.Close();\r
 141             }\r
 142             catch (Exception)\r
 143             {\r
 144                 // Do nothing\r
 145             }\r
 146         }\r
 147     }\r
 148 }