make access fault-tolerant - show error message; show top-level link on breadcrumbs again

git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2796 fd906abe-77d9-0310-91a1-e0d9ade77398

integrator/browser/bscw.py

@@ -78,11 +78,12 @@ class ItemView(BaseView):
     @property
     def breadCrumbs(self):
         parents = list(self.context.parents)
-        for p in reversed(parents[:-1]):
+        #for p in reversed(parents[:-1]):
+        for p in reversed(parents):
             view = ItemView(p, self.request, self.parentView)
             yield dict(url=view.url, title=view.title)
-        #if parents:
-        #    yield dict(url=self.url, title=self.title)
+        if parents:
+            yield dict(url=self.url, title=self.title)
 
 
 class BSCWView(BaseView):
@@ -100,6 +101,8 @@ class BSCWView(BaseView):
 
     @Lazy
     def itemMacro(self):
+        if self.remoteProxy is None:
+            return None
         typeName = self.remoteProxy.itemType.lower()
         return self.viewTemplate.macros.get(typeName, self.defaultMacro)
 
@@ -115,6 +118,8 @@ class BSCWView(BaseView):
 
     @Lazy
     def item(self):
+        if self.remoteProxy is None:
+            return None
         return self.itemView(self.remoteProxy, self.request, self)
 
     def content(self):

integrator/bscw.py

@@ -22,10 +22,11 @@ Access to objects in a BSCW repository.
 $Id$
 """
 
+import logging
 import os
 from datetime import datetime
 from time import strptime
-from xmlrpclib import ServerProxy
+from xmlrpclib import ServerProxy, Fault
 from zope import component
 from zope.app.file.image import getImageInfo
 from zope.cachedescriptors.property import Lazy
@@ -83,13 +84,25 @@ class BSCWConnection(object):
             self.baseURL, self.rootId = url.rsplit('/', 1)
 
     def getItem(self, address, nested=True):
-        return self.server.get_attributes(address, standardAttributes, 1, nested)
+        try:
+            item = self.server.get_attributes(address, standardAttributes, 1, nested)
+        except Fault, excp:
+            logging.getLogger('cybertools.integrator.bscw').warn(str(excp))
+            item = None
+        except Exception, excp:
+            logging.getLogger('cybertools.integrator.bscw').error(str(excp))
+            item = None
+        return item
 
     def getProxy(self, item=None, address=None, parentPath='', nested=True):
         if item is None:
             if address is None:
                 address = self.rootId
-            item = self.getItem(address, nested=nested)[0]
+            items = self.getItem(address, nested=nested)
+            if items:
+                item = items[0]
+            else:
+                return None
         address = item['id']
         itemType = item['__class__'].split('.')[-1]
         internalPath = '/'.join((parentPath, address)).strip('/')
@@ -220,7 +233,15 @@ class File(BSCWProxyBase, File):
     contentType = None
 
     def getData(self, num=None):
-        return self.server.get_document()
+        try:
+            data = self.server.get_document()
+        except Fault, excp:
+            logging.getLogger('cybertools.integrator.bscw').warn(str(excp))
+            item = None
+        except Exception, excp:
+            logging.getLogger('cybertools.integrator.bscw').error(str(excp))
+            item = None
+        return data
     data = property(getData)
 
     def getSize(self):