Filters/FilterRPM.cs

   1 //
   2 // FilterRPM.cs
   3 //
   4 // Copyright (C) 2006 Debajyoti Bera <dbera.web@gmail.com>
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.IO;
  29 using System.Text;
  30 using System.Collections;
  31 using System.Diagnostics;
  32 using System.Xml;
  33
  34 using Beagle.Daemon;
  35 using Beagle.Util;
  36
  37 namespace Beagle.Filters {
  38         public class FilterRPM : Beagle.Daemon.Filter {
  39
  40                 private class RpmPropertyInfo {
  41                         public string property_name;
  42                         public bool is_keyword;
  43
  44                         public RpmPropertyInfo (string property_name, bool is_keyword)
  45                         {
  46                                 this.property_name = property_name;
  47                                 this.is_keyword = is_keyword;
  48                         }
  49                 }
  50
  51                 private static Hashtable hash_property_list;
  52                 static FilterRPM ()
  53                 {
  54                     hash_property_list = new Hashtable ();
  55
  56                     // mapping between rpm tagname and beagle property name
  57                     hash_property_list ["Name"]          = new RpmPropertyInfo ("dc:title", false);
  58                     hash_property_list ["Version"]       = new RpmPropertyInfo ("fixme:version", true);
  59                     hash_property_list ["Release"]       = new RpmPropertyInfo ("fixme:release", true);
  60                     hash_property_list ["Summary"]       = new RpmPropertyInfo ("dc:subject", false);
  61                     hash_property_list ["Description"]   = new RpmPropertyInfo ("dc:description", false);
  62                     hash_property_list ["License"]       = new RpmPropertyInfo ("dc:rights", false);
  63                     hash_property_list ["Group"]         = new RpmPropertyInfo ("fixme:group", false);
  64                     hash_property_list ["Url"]           = new RpmPropertyInfo ("dc:source", true);
  65                     hash_property_list ["Os"]            = new RpmPropertyInfo ("fixme:os", false);
  66                     hash_property_list ["Arch"]          = new RpmPropertyInfo ("fixme:arch", false);
  67                     hash_property_list ["Changelogtext"] = new RpmPropertyInfo ("fixme:changelog", false);
  68                 }
  69
  70                 public FilterRPM ()
  71                 {
  72                         AddSupportedFlavor (FilterFlavor.NewFromMimeType ("application/x-rpm"));
  73                 }
  74
  75                 protected override void DoPullProperties ()
  76                 {
  77                         Process pc = new Process ();
  78                         pc.StartInfo.FileName = "rpm";
  79                         pc.StartInfo.Arguments = " -qp --queryformat '[%{*:xml}\n]' \"" + FileInfo.FullName+"\"";
  80                         pc.StartInfo.RedirectStandardInput = false;
  81                         pc.StartInfo.RedirectStandardOutput = true;
  82                         pc.StartInfo.RedirectStandardError = true;
  83                         pc.StartInfo.UseShellExecute = false;
  84
  85                         try {
  86                                 pc.Start ();
  87                         } catch (System.ComponentModel.Win32Exception) {
  88                                 Log.Warn ("Error: 'rpm' command not found or unable to run");
  89                                 Error ();
  90                                 return;
  91                         }
  92
  93                         StreamReader pout = pc.StandardOutput;
  94                         XmlTextReader reader = new XmlTextReader (pout);
  95                         reader.WhitespaceHandling = WhitespaceHandling.None;
  96
  97                         try {
  98                                 ParseRpmTags (reader);
  99                         } catch (XmlException) {
 100                                 Logger.Log.Debug ("FilterRPM: Error parsing output of rpmquery!");
 101                                 Error ();
 102                         }
 103                         Finished ();
 104                 }
 105
 106                 private void ParseRpmTags (XmlTextReader reader)
 107                 {
 108                         RpmPropertyInfo prop_info = null;
 109
 110                         reader.Read ();
 111                         while (reader.Read ()) {
 112                                 if (reader.IsEmptyElement || ! reader.IsStartElement ())
 113                                         continue;
 114                                 else if (reader.Name != "rpmTag") {
 115                                         reader.Skip ();
 116                                         continue;
 117                                 }
 118                                 string attr_name = reader ["name"];
 119                                 //Logger.Log.Debug ("Read element:" + reader.Name + " - " + attr_name);
 120
 121                                 // store basenames values as Text - they are like the "text"-content of rpm files
 122                                 if (attr_name == "Basenames") {
 123                                         ReadStringValues (reader, true, null);
 124                                         continue;
 125                                 }
 126
 127                                 prop_info = (RpmPropertyInfo) hash_property_list [attr_name];
 128                                 if (prop_info != null)
 129                                         ReadStringValues (reader, false, prop_info);
 130                         }
 131                 }
 132
 133                 private void ReadStringValues (XmlTextReader reader, bool store_as_text, RpmPropertyInfo prop_info)
 134                 {
 135                         reader.ReadStartElement ();
 136
 137                         while (reader.IsStartElement ()) {
 138                                 //Logger.Log.Debug ("        Reading value for:" + reader.Name);
 139                                 if (reader.IsEmptyElement)
 140                                         reader.Skip ();
 141
 142                                 string content = HtmlAgilityPack.HtmlEntity.DeEntitize (reader.ReadInnerXml ());
 143                                 //Logger.Log.Debug (prop_info.property_name
 144                                 //      + (prop_info.is_keyword ? " (keyword)" : " (text)")
 145                                 //      + " = [" + content + "]");
 146
 147                                 if (store_as_text) {
 148                                         AppendText (content);
 149                                         AppendWhiteSpace ();
 150                                         continue;
 151                                 }
 152
 153                                 if (prop_info.is_keyword)
 154                                         AddProperty (Beagle.Property.New (prop_info.property_name, content));
 155                                 else
 156                                         AddProperty (Beagle.Property.NewUnsearched (prop_info.property_name, content));
 157                         }
 158
 159                         //Logger.Log.Debug ("    Done reading values. Now at " +
 160                         //      (reader.IsStartElement () ? "" : "/") + reader.Name);
 161                 }
 162         }
 163 }