Page({
  data: {
    baseUrl:"https://gofly.sopans.com",
    visitors:[]
  },
  login(){
    my.alert({ title: 'You click reset' });
  },
  onLoad(){
    let _this=this;
    var baseUrl=this.data.baseUrl;
    my.request({
      url: baseUrl+'/visitors_online',
      method: 'GET',
      success: function(res) {
      },
      fail: function(res) {
        my.alert({content: 'fail'});
      },
      complete: function(res) {
        my.hideLoading();
        _this.setData({
          visitors: res.data.result.ws,
        });
      }
  });
  }
});

  <list>
    <list-item a:for="{{visitors}}" thumb="{{baseUrl+item.avator}}"
    onClick="onItemClick"
    upperSubtitle="新访客" >
    {{item.name}}
  </list-item>
  </list>