javascript 的socket 报出的“200”错误，怎么解决

Question

WebSocket connection to 'ws://127.0.0.1:8020/' failed: Error during WebSocket handshake: Unexpected response code: 200
握手信息200是错误？？？不是很懂

以下是出事故的代码：
connect : function(url) {

// Websocket initialization
if (this.ws != undefined) {
  this.ws.close();
  delete this.ws;
}
this.ws = new WebSocket(url);      //<==there is a error O~O
this.ws.binaryType = "arraybuffer";

this.ws.onopen = () => {
  log("Connected to " + url);
};

Answer 1

response code 200说明正常，，，

http状态返回代码 1xx（临时响应）
http状态返回代码 2xx （成功）
http状态返回代码 3xx （重定向）
http状态返回代码 4xx（请求错误）
http状态返回代码 5xx（服务器错误）