win/C#/Functions/AppcastReader.cs

   1 /*  RssReader.cs $\r
   2     This file is part of the HandBrake source code.\r
   3     Homepage: <http://handbrake.fr>.\r
   4     It may be used under the terms of the GNU General Public License. */\r
   5 \r
   6 namespace Handbrake.Functions\r
   7 {\r
   8     using System;\r
   9     using System.IO;\r
  10     using System.Text.RegularExpressions;\r
  11     using System.Xml;\r
  12 \r
  13     /// <summary>\r
  14     /// Appcast Reader - Used for parsing HandBrakes update file\r
  15     /// </summary>\r
  16     public class AppcastReader\r
  17     {\r
  18         /// <summary>\r
  19         /// Gets Information about an update to HandBrake\r
  20         /// </summary>\r
  21         public Uri DescriptionUrl { get; private set; }\r
  22 \r
  23         /// <summary>\r
  24         /// Gets HandBrake's version from the appcast.xml file.\r
  25         /// </summary>\r
  26         public string Version { get; private set; }\r
  27 \r
  28         /// <summary>\r
  29         /// Gets HandBrake's Build from the appcast.xml file.\r
  30         /// </summary>\r
  31         public string Build { get; private set; }\r
  32 \r
  33         /// <summary>\r
  34         /// Gets the URL for update file.\r
  35         /// </summary>\r
  36         public string DownloadFile { get; private set; }\r
  37 \r
  38         /// <summary>\r
  39         /// Get the build information from the required appcasts. Run before accessing the public vars.\r
  40         /// </summary>\r
  41         /// <param name="input">\r
  42         /// The input.\r
  43         /// </param>\r
  44         public void GetInfo(string input)\r
  45         {\r
  46             try\r
  47             {\r
  48                 // Get the correct Appcast and set input.\r
  49                 XmlNode nodeItem = ReadRss(new XmlTextReader(new StringReader(input)));\r
  50                 string result = nodeItem.InnerXml;\r
  51 \r
  52                 // Regular Expressions\r
  53                 Match ver = Regex.Match(result, @"sparkle:version=""([0-9]*)\""");\r
  54                 Match verShort = Regex.Match(result, @"sparkle:shortVersionString=""(([svn]*)([0-9.\s]*))\""");\r
  55 \r
  56                 this.Build = ver.ToString().Replace("sparkle:version=", string.Empty).Replace("\"", string.Empty);\r
  57                 this.Version = verShort.ToString().Replace("sparkle:shortVersionString=", string.Empty).Replace("\"", \r
  58                                                                                                                 string.\r
  59                                                                                                                     Empty);\r
  60                 this.DownloadFile = nodeItem["windows"].InnerText;\r
  61                 this.DescriptionUrl = new Uri(nodeItem["sparkle:releaseNotesLink"].InnerText);\r
  62             }\r
  63             catch (Exception)\r
  64             {\r
  65                 return;\r
  66             }\r
  67         }\r
  68 \r
  69         /// <summary>\r
  70         /// Read the RSS file.\r
  71         /// </summary>\r
  72         /// <param name="rssReader">\r
  73         /// The RSS reader\r
  74         /// </param>\r
  75         /// <returns>\r
  76         /// The read rss.\r
  77         /// </returns>\r
  78         private static XmlNode ReadRss(XmlReader rssReader)\r
  79         {\r
  80             XmlNode nodeItem = null;\r
  81             XmlNode nodeChannel = null;\r
  82             XmlNode nodeRss = null;\r
  83 \r
  84             XmlDocument rssDoc = new XmlDocument();\r
  85             rssDoc.Load(rssReader);\r
  86 \r
  87             foreach (XmlNode t in rssDoc.ChildNodes)\r
  88             {\r
  89                 if (t.Name == "rss")\r
  90                 {\r
  91                     nodeRss = t;\r
  92                 }\r
  93             }\r
  94 \r
  95             if (nodeRss != null)\r
  96             {\r
  97                 foreach (XmlNode t in nodeRss.ChildNodes)\r
  98                 {\r
  99                     if (t.Name == "channel")\r
 100                     {\r
 101                         nodeChannel = t;\r
 102                     }\r
 103                 }\r
 104             }\r
 105 \r
 106             if (nodeChannel != null)\r
 107             {\r
 108                 foreach (XmlNode t in nodeChannel.ChildNodes)\r
 109                 {\r
 110                     if (t.Name == "item")\r
 111                     {\r
 112                         nodeItem = t;\r
 113                     }\r
 114                 }\r
 115             }\r
 116 \r
 117             return nodeItem;\r
 118         }\r
 119     }\r
 120 }