The user must only be able to close the connection if it is defined

slapos/libnetworkcache/__init__.py

@@ -131,8 +131,11 @@ class NetworkcacheClient(object):
 
   def close(self):
     ''' It must be called to close the HTTP Connection. '''
-    self.shacache_connection.close()
-    self.shadir_connection.close()
+    if hasattr(self, 'shacache_connection'):
+      self.shacache_connection.close()
+
+    if hasattr(self, 'shadir_connection'):
+      self.shadir_connection.close()
 
 class FileNotFound(Exception):
     pass