请教一下，wx.connectSocket还没有成功返回SocketTask，紧接着就调用socket.onOpen()、socket.onMessage()，
此时会报socket undefined的错误。这个问题应该怎么解决呢？
代码如下

  var socket = wx.connectSocket({
    //url: "adsasada",
    url: 'ws://127.0.0.1:8080/test',
    success: function (resConnect) {
      console.log("resConnect: ", resConnect);
    },
    fail: function (resConnectError) {
      console.log("resConnectError: ", resConnectError);
    }
  });

  socket.onOpen(function (resOpen) {     //  此时连接未成功建立，会提示socket undefined
    console.log("连接已打开：", resOpen)
  })
  socket.onMessage(function (resMessage) {
    console.log("socket接收到消息：", resMessage)
  })