Web-services: do not allow to call methods that starts with '_' (=private methods). Add a warning: if a method returns a None value

bzr revid: hda@tinyerp.com-20100309142807-bom0jqwyndkacoo8

bin/osv/osv.py

@@ -115,7 +115,12 @@ class osv_pool(netsvc.Service):
         cr = db.cursor()
         try:
             try:
+                if method.startswith('_'):
+                    raise except_osv('Method Error', 'Private method %s can not be calleble.' % (method,))
                 res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
+                if res is None:
+                    self.logger.notifyChannel("web-services", netsvc.LOG_WARNING,
+                    'Method can not return a None value (crash in XML-RPC)')
                 cr.commit()
             except Exception:
                 cr.rollback()