Filters/FilterOle.cs

   1 //
   2 // FilterOle.cs
   3 //
   4 // Copyright (C) 2004 Novell, Inc.
   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
  28 using System;
  29 using System.Collections;
  30 using System.IO;
  31 using System.Text;
  32 using Gsf;
  33
  34 using Beagle.Daemon;
  35 using Beagle.Util;
  36
  37 namespace Beagle.Filters {
  38
  39         public abstract class FilterOle : Beagle.Daemon.Filter {
  40
  41                 public FilterOle ()
  42                 {
  43                 }
  44
  45                 protected virtual void ExtractMetaData (Gsf.Input sum_stream,
  46                                                         Gsf.Input doc_stream)
  47                 {
  48                 }
  49
  50                 protected virtual void OpenStorage (FileInfo info) {}
  51
  52                 protected Infile file;
  53                 protected DocMetaData sumMeta = null;
  54                 protected DocMetaData docSumMeta = null;
  55                 protected string FileName;
  56
  57                 override protected void DoOpen (FileInfo info)
  58                 {
  59                         try {
  60                                 Gsf.Global.Init ();
  61
  62                                 Input input = new InputStdio (info.FullName);
  63
  64                                 if (input != null) {
  65                                         Input uncompressed_input = input.Uncompress();
  66                                         input.Dispose ();
  67                                         file = new InfileMSOle (uncompressed_input);
  68                                         uncompressed_input.Dispose ();
  69                                 }
  70
  71                                 if (input == null || file == null) {
  72                                         Logger.Log.Error ("Unable to open [{0}] ",info.FullName);
  73                                         Console.WriteLine ("input/file is null");
  74                                         Error ();
  75                                         return;
  76                                 }
  77
  78                                 OpenStorage (info);
  79                         } catch (Exception e) {
  80                                 Logger.Log.Error ("Unable to open "+info.FullName);
  81                                 Console.WriteLine ("{0}", e.Message);
  82                                 Error ();
  83                                 return;
  84                         }
  85                 }
  86
  87                 void PullMetaData (Gsf.Input sum_stream, Gsf.Input doc_stream)
  88                 {
  89
  90                         DocProp prop = null;
  91
  92                         sumMeta = new DocMetaData ();
  93                         if (sum_stream != null)
  94                                 Msole.MetadataRead (sum_stream, sumMeta);
  95                         else
  96                                 Logger.Log.Warn ("SummaryInformationStream not found in {0}", FileName);
  97
  98                         docSumMeta = new DocMetaData ();
  99                         if (doc_stream != null)
 100                                 Msole.MetadataRead (doc_stream, docSumMeta);
 101                         else
 102                                 Logger.Log.Warn ("DocumentSummaryInformationStream not found in {0}", FileName);
 103
 104                         if (sumMeta != null) {
 105                                 prop = sumMeta.Lookup ("dc:title");
 106                                 if (prop != null)
 107                                         AddProperty (Beagle.Property.New ("dc:title", prop.Val as string));
 108
 109                                 prop = sumMeta.Lookup ("dc:subject");
 110                                 if (prop != null)
 111                                         AddProperty (Beagle.Property.New ("dc:subject", prop.Val as string));
 112
 113                                 prop = sumMeta.Lookup ("dc:description");
 114                                 if (prop != null)
 115                                         AddProperty (Beagle.Property.New ("dc:description", prop.Val as string));
 116
 117                                 prop = sumMeta.Lookup ("gsf:keywords");
 118                                 if (prop != null)
 119                                         AddProperty (Beagle.Property.New ("fixme:keywords", prop.Val as string));
 120
 121                                 prop = sumMeta.Lookup ("gsf:creator");
 122                                 if (prop != null)
 123                                         AddProperty (Beagle.Property.New ("fixme:author", prop.Val as string));
 124
 125                                 prop = sumMeta.Lookup ("gsf:last-saved-by");
 126                                 if (prop != null)
 127                                         AddProperty (Beagle.Property.New ("fixme:last-saved-by", prop.Val as string));
 128
 129                                 prop = sumMeta.Lookup ("gsf:generator");
 130                                 if (prop != null)
 131                                         AddProperty (Beagle.Property.New ("fixme:generator", prop.Val as string));
 132
 133                                 prop = sumMeta.Lookup ("gsf:template");
 134                                 if (prop != null)
 135                                         AddProperty (Beagle.Property.New ("fixme:template", prop.Val as string));
 136                         }
 137
 138                         if (docSumMeta != null) {
 139                                 prop = docSumMeta.Lookup ("gsf:company");
 140                                 if (prop != null)
 141                                         AddProperty (Beagle.Property.New ("fixme:company", prop.Val as string));
 142
 143                                 prop = docSumMeta.Lookup ("gsf:category");
 144                                 if (prop != null)
 145                                         AddProperty (Beagle.Property.New ("fixme:category", prop.Val as string));
 146                         }
 147
 148                         ExtractMetaData (sum_stream, doc_stream);
 149
 150                         if (sumMeta != null)
 151                                 sumMeta.Dispose ();
 152
 153                         if (docSumMeta != null)
 154                                 docSumMeta.Dispose ();
 155                 }
 156
 157                 override protected void DoPullProperties ()
 158                 {
 159                         Input sum_stream = null;
 160                         Input doc_stream = null;
 161
 162                         if (file == null) {
 163                                 Finished ();
 164                                 return;
 165                         }
 166
 167                         try {
 168                                 sum_stream = file.ChildByName ("\u0005SummaryInformation");
 169                                 doc_stream = file.ChildByName ("\u0005DocumentSummaryInformation");
 170
 171                                 PullMetaData (sum_stream, doc_stream);
 172                         } catch (Exception e) {
 173                                 Logger.Log.Error (e, "Exception occurred duing DoPullProperties.");
 174                                 Error ();
 175                         } finally {
 176                                 if (sum_stream != null)
 177                                         sum_stream.Dispose ();
 178                                 if (doc_stream != null)
 179                                         doc_stream.Dispose ();
 180                         }
 181                 }
 182
 183                 override protected void DoClose ()
 184                 {
 185                         if (file != null)
 186                                 file.Dispose ();
 187
 188                         Log.Debug ("File should be closed now or very shortly.");
 189
 190                         // FIXME: Uncomment this when Shutdown() is available in gsf#
 191                         // Gsf.Global.Shutdown ();
 192                 }
 193
 194                 // FIXME: These are utility functions and can be useful
 195                 // outside this filter as well.
 196                 public static uint GetInt32 (byte [] data, int offset) {
 197                         return (uint)(data[offset] + (data[offset + 1] << 8) + (data[offset + 2] << 16) + (data[offset + 3] << 24));
 198                 }
 199                 public static ushort GetInt16 (byte [] data, int offset) {
 200                         return (ushort)(data[offset] + (data[offset + 1] << 8));
 201                 }
 202
 203         }
 204 }