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                         string str = null;
  92
  93                         sumMeta = new DocMetaData ();
  94                         if (sum_stream != null)
  95                                 Msole.MetadataRead (sum_stream, sumMeta);
  96                         else
  97                                 Logger.Log.Warn ("SummaryInformationStream not found in {0}", FileName);
  98
  99                         docSumMeta = new DocMetaData ();
 100                         if (doc_stream != null)
 101                                 Msole.MetadataRead (doc_stream, docSumMeta);
 102                         else
 103                                 Logger.Log.Warn ("DocumentSummaryInformationStream not found in {0}", FileName);
 104
 105                         if (sumMeta != null) {
 106                                 prop = sumMeta.Lookup ("dc:title");
 107                                 if (prop != null)
 108                                         str = prop.Val as string;
 109                                 if (str != null && str.Length > 0)
 110                                         AddProperty (Beagle.Property.New ("dc:title", str));
 111
 112                                 str = null;
 113                                 prop = sumMeta.Lookup ("dc:subject");
 114                                 if (prop != null)
 115                                         str = prop.Val as string;
 116                                 if (str != null && str.Length > 0)
 117                                         AddProperty (Beagle.Property.New ("dc:subject", str));
 118
 119                                 str = null;
 120                                 prop = sumMeta.Lookup ("dc:description");
 121                                 if (prop != null)
 122                                         str = prop.Val as string;
 123                                 if (str != null && str.Length > 0)
 124                                         AddProperty (Beagle.Property.New ("dc:description", str));
 125
 126                                 str = null;
 127                                 prop = sumMeta.Lookup ("gsf:keywords");
 128                                 if (prop != null)
 129                                         str = prop.Val as string;
 130                                 if (str != null && str.Length > 0)
 131                                         AddProperty (Beagle.Property.New ("fixme:keywords", str));
 132
 133                                 str = null;
 134                                 prop = sumMeta.Lookup ("gsf:creator");
 135                                 if (prop != null)
 136                                         str = prop.Val as string;
 137                                 if (str != null && str.Length > 0)
 138                                         AddProperty (Beagle.Property.New ("fixme:author", str));
 139
 140                                 str = null;
 141                                 prop = sumMeta.Lookup ("gsf:last-saved-by");
 142                                 if (prop != null)
 143                                         str = prop.Val as string;
 144                                 if (str != null && str.Length > 0)
 145                                         AddProperty (Beagle.Property.New ("fixme:last-saved-by", str));
 146
 147                                 str = null;
 148                                 prop = sumMeta.Lookup ("gsf:generator");
 149                                 if (prop != null)
 150                                         str = prop.Val as string;
 151                                 if (str != null && str.Length > 0)
 152                                         AddProperty (Beagle.Property.New ("fixme:generator", str));
 153
 154                                 str = null;
 155                                 prop = sumMeta.Lookup ("gsf:template");
 156                                 if (prop != null)
 157                                         str = prop.Val as string;
 158                                 if (str != null && str.Length > 0)
 159                                         AddProperty (Beagle.Property.New ("fixme:template", str));
 160                         }
 161
 162                         if (docSumMeta != null) {
 163                                 str = null;
 164                                 prop = docSumMeta.Lookup ("gsf:company");
 165                                 if (prop != null)
 166                                         str = prop.Val as string;
 167                                 if (str != null && str.Length > 0)
 168                                         AddProperty (Beagle.Property.New ("fixme:company", str));
 169
 170                                 str = null;
 171                                 prop = docSumMeta.Lookup ("gsf:category");
 172                                 if (prop != null)
 173                                         str = prop.Val as string;
 174                                 if (str != null && str.Length > 0)
 175                                         AddProperty (Beagle.Property.New ("fixme:category", str));
 176
 177                         }
 178
 179                         ExtractMetaData (sum_stream, doc_stream);
 180
 181                         if (sumMeta != null)
 182                                 sumMeta.Dispose ();
 183
 184                         if (docSumMeta != null)
 185                                 docSumMeta.Dispose ();
 186                 }
 187
 188                 override protected void DoPullProperties ()
 189                 {
 190                         Input sum_stream = null;
 191                         Input doc_stream = null;
 192
 193                         if (file == null) {
 194                                 Finished ();
 195                                 return;
 196                         }
 197
 198                         try {
 199                                 sum_stream = file.ChildByName ("\u0005SummaryInformation");
 200                                 doc_stream = file.ChildByName ("\u0005DocumentSummaryInformation");
 201
 202                                 PullMetaData (sum_stream, doc_stream);
 203                         } catch (Exception e) {
 204                                 Logger.Log.Error (e, "Exception occurred duing DoPullProperties.");
 205                                 Error ();
 206                         } finally {
 207                                 if (sum_stream != null)
 208                                         sum_stream.Dispose ();
 209                                 if (doc_stream != null)
 210                                         doc_stream.Dispose ();
 211                         }
 212                 }
 213
 214                 override protected void DoClose ()
 215                 {
 216                         if (file != null)
 217                                 file.Dispose ();
 218
 219                         Log.Debug ("File should be closed now or very shortly.");
 220
 221                         // FIXME: Uncomment this when Shutdown() is available in gsf#
 222                         // Gsf.Global.Shutdown ();
 223                 }
 224
 225                 // FIXME: These are utility functions and can be useful
 226                 // outside this filter as well.
 227                 public static uint GetInt32 (byte [] data, int offset) {
 228                         return (uint)(data[offset] + (data[offset + 1] << 8) + (data[offset + 2] << 16) + (data[offset + 3] << 24));
 229                 }
 230                 public static ushort GetInt16 (byte [] data, int offset) {
 231                         return (ushort)(data[offset] + (data[offset + 1] << 8));
 232                 }
 233
 234         }
 235 }