public function index()
 {
     $wechatauth = new WechatAuth(C('WEIXIN.APPID'), C('WEIXIN.SECRET'), C(''));
     $access_token = $wechatauth->getAccessToken();
     $result = $wechatauth->getServerIp($access_token);
     if (isset($result['errcode'])) {
         $this->error($result['errmsg']);
     }
     slog($result);
     $this->assign('ip', $result['ip_list']);
     $this->display();
 }