小程序使用websocket

var wsApi = "wss://域名/wss";
Page({
    data: {},
//本地服务器地址
    onLoad: function (options) {
        let self = this
        let st = wx.connectSocket({
        url: wsApi,
        header:{
            'content-type': 'application/json'
        },
        })
        st.onOpen(function(openRes){
            var uid = 'uid2';
            st.send(uid);
        })
        this.ws = st // 其他地方可以访问到socket
        st.onMessage(function(msg){
        console.log('msg: ', msg)
        let data = JSON.parse(msg.data).data
        if (!!data) {
            self.setData({
            msgList: [...self.data.msgList, data]
            })
        }
        })
        st.onClose()
  },
});