websocket的两个属性:readyState和bufferedAmount。
根据readyState属性可以判断webSocket的连接状态,该属性的值可以是下面几种:
0 :对应常量CONNECTING (numeric value 0),
正在建立连接连接,还没有完成。The connection has not yet been established.
1 :对应常量OPEN (numeric value 1),
连接成功建立,可以进行通信。The WebSocket connection is established and communication is possible.
2 :对应常量CLOSING (numeric value 2)
连接正在进行关闭握手,即将关闭。The connection is going through the closing handshake.
3 : 对应常量CLOSED (numeric value 3)
连接已经关闭或者根本没有建立。The connection has been closed or could not be opened.
例:
var socket = new WebSocket(url);
if(socket.readyState!=1){
alert("未连接。");
return;
}
根据bufferedAmount可以知道有多少字节的数据等待发送,若websocket已经调用了close方法则该属性将一直增长。
原文地址:https://www.cnblogs.com/ertingbo/p/9413243.html
时间: 2024-10-07 10:11:02