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From "Paolo Nacci (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TIKA-1022) DWG Custom properties not extracted
Date Fri, 09 Nov 2012 18:06:13 GMT
Paolo Nacci created TIKA-1022:
---------------------------------

             Summary: DWG Custom properties not extracted
                 Key: TIKA-1022
                 URL: https://issues.apache.org/jira/browse/TIKA-1022
             Project: Tika
          Issue Type: Bug
          Components: metadata
    Affects Versions: 1.2, 1.1, 1.0, 1.3
            Reporter: Paolo Nacci


Based on some code I provided some time ago (Alfresco forum), Derek Hulley opened ALF-2262,
Nick Burch opened TIKA-413 issue and code has been committed to TIKA (0.8).

With sample dwg provided TIKA (0.8 to 1.2) is correctly working but with attached file returns
no custom metadata (my original "C" returns correct custom metadata, dwg is "2010" format).

Tested tika-app.1.0.jar and tika-app.1.2.jar and tika 1.3 snapshot.
All versions could be impacted by this bug. 

I found failing code in skipToCustomProperties() of DWGParser.java, lines 320-321: 
if(padding[0] == 0 && padding[1] == 0 &&
  padding[2] == 0 && padding[3] == 0) {

padding[0] byte is not always 0 (attached file has 0x2) and probably there is no need to check
those bytes.

--- T:/Temp/DWGPa-revBASE.svn000.tmp.java	mar lug  3 05:14:39 2012
+++ C:/Users/paolon/Documents/Tika/tika-parsers/src/main/java/org/apache/tika/parser/dwg/DWGParser.java
ven nov  9 19:04:26 2012
@@ -317,13 +317,7 @@
 
     private int skipToCustomProperties(InputStream stream) 
             throws IOException, TikaException {
-       // There should be 4 zero bytes next
-       byte[] padding = new byte[4];
-       IOUtils.readFully(stream, padding);
-       if(padding[0] == 0 && padding[1] == 0 &&
-             padding[2] == 0 && padding[3] == 0) {
-          // Looks hopeful, skip on
-          padding = new byte[CUSTOM_PROPERTIES_SKIP];
+          byte[] padding = new byte[CUSTOM_PROPERTIES_SKIP];
           IOUtils.readFully(stream, padding);
           
           // We should now have the count
@@ -337,10 +331,6 @@
              // No properties / count is too high to trust
              return 0;
           }
-       } else {
-          // No padding. That probably means no custom props
-          return 0;
-       }
     }
 
 }


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