Do not swallow exceptions.

At start of opcua-http-gw the code sends None as default values, make sure to filter this (wip).

bt5/erp5_opcua/SkinTemplateItem/portal_skins/erp5_opcua/ERP5Site_handleOPCUARequest.py

@@ -32,17 +32,19 @@ elif http_method == "POST":
   # assume write request
   try:
     data = context.REQUEST.data
-  except AttributeError:
+  except AttributeError as e:
     log("Warning: 'data' is missing from request.")
+    raise e
   else:
     data = json.loads(data)
     if 'node' in data.keys():
       # log only set requests for now
       node_id = data['node']
       node_value = data['val']
-      log("Set '%s' =  '%s' to %s as %s" %(node_id, node_value, default_opcua_document, node_id))
-      # set to  "ERP5 OPCUA Document"
-      node_dict = default_opcua_document.getNodeDict()
-      node_dict[node_id] = convertNodeValue(node_id, node_value)
-      default_opcua_document.setNodeDict(node_dict)
-      log("Changed = %s" %default_opcua_document.getNodeDict())
+      # set to  "ERP5 OPCUA Document" but only if it's not a None value
+      if node_value is not None and node_value != "None":
+        log("Set '%s' =  '%s' to %s as %s" %(node_id, node_value, default_opcua_document, node_id))
+        node_dict = default_opcua_document.getNodeDict()
+        node_dict[node_id] = convertNodeValue(node_id, node_value)
+        default_opcua_document.setNodeDict(node_dict)
+        log("Changed = %s" %default_opcua_document.getNodeDict())