check http response code, if unauthorized, login again

src/bin/bindctl/bindcmd.py

@@ -217,16 +217,24 @@ class BindCmdInterpreter(Cmd):
         for module_name in self.config_data.get_config_item_list():
             self._prepare_module_commands(self.config_data.get_module_spec(module_name))
 
+    def _send_message(self, url, body):
+        headers = {"cookie" : self.session_id}
+        self.conn.request('GET', url, body, headers)
+        res = self.conn.getresponse()
+        return res.status, res.read()
+
     def send_GET(self, url, body = None):
         '''Send GET request to cmdctl, session id is send with the name
         'cookie' in header.
         '''
-        headers = {"cookie" : self.session_id}
-        self.conn.request('GET', url, body, headers)
-        res = self.conn.getresponse()
-        reply_msg = res.read()
+        status, reply_msg = self._send_message(url, body)
+        if status == http.client.UNAUTHORIZED:
+            if self.login_to_cmdctl():
+                # successful, so try send again
+                status, reply_msg = self._send_message(url, body)
+            
         if reply_msg:
-           return json.loads(reply_msg.decode())
+            return json.loads(reply_msg.decode())
         else:
             return {}