my.request({
    url: 'https://gofly.sopans.com/visitors_online',
    method: 'GET',
    success: function(res) {
      my.alert({content: 'success'});
    },
    fail: function(res) {
      my.alert({content: 'fail'});
    },
    complete: function(res) {
      my.hideLoading();
      my.alert({content: 'complete'});
    }
  });