avoid error on catalog reindex because of missing or corrupt ZIP files

resource.py

@@ -21,6 +21,7 @@ Definition of the Concept class.
 """
 
 from cStringIO import StringIO
+from logging import getLogger
 from persistent import Persistent
 from zope import component, schema
 from zope.app.container.btree import BTreeContainer
@@ -63,6 +64,8 @@ from loops import util
 from loops.versioning.util import getMaster
 from loops.view import TargetRelation
 
+logger = getLogger('loops.resource')
+
 _ = MessageFactory('loops')
 
 
@@ -602,7 +605,12 @@ def transformToText(obj, data=None, contentType=None):
         if rfa is None:
             if isinstance(data, unicode):
                 data = data.encode('UTF-8')
+            try:
                 return transform(StringIO(data))
+            except:
+                import traceback
+                logger.warn(traceback.format_exc())
+                return u''
         else:
             return transform(rfa)