建立连接后成功，进入成功回调，但是onSocketOpen和onSocketMessage都不打印，求解，代码如下:

onLoad: function (options) {

    wx.connectSocket({

        url: ‘ws://xxx.xx.xxx:80xx/xxx/websocket/’,

        data: {},

        header: {

            ‘content-type’: ‘application/json’

        },

        method: ‘GET’,

        success: function (socketRes) {

            console.log('connect success: ', socketRes);

        },

        fail: function (err) {

            console.log('connect error: ', err)

        }

    });

    wx.onSocketOpen(function (res) {

        console.log(‘WebSocket连接已打开！’)

    })

    wx.onSocketMessage(function (res) {

        console.log(‘收到服务器内容：’ + res.data)

    })

}