websocket handshake unexpected response code 404问题

Html页面websocket客户端出现websocket handshake unexpected response code 404问题，一般是地址错误。在new WebSocket()里需要带上部署的服务名。

websocket = new WebSocket("ws://localhost:8080/access-web/websocket"); 其中access-web是服务名

//连接发生错误的回调方法
websocket.onerror = function () {
setMessageInnerHTML("WebSocket连接发生错误");
};

//连接成功建立的回调方法
websocket.onopen = function () {
setMessageInnerHTML("WebSocket连接成功");
}

//接收到消息的回调方法
websocket.onmessage = function (event) {
setMessageInnerHTML(event.data);
}

//连接关闭的回调方法
websocket.onclose = function () {
setMessageInnerHTML("WebSocket连接关闭");
}

//监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
window.onbeforeunload = function () {
closeWebSocket();
}

//将消息显示在网页上
function setMessageInnerHTML(innerHTML) {
document.getElementById('message').innerHTML += innerHTML + '<br/>';
}

//关闭WebSocket连接
function closeWebSocket() {
websocket.close();
}

//发送消息
function send() {
var message = document.getElementById('text').value;
websocket.send(message);
}
</script>

转载于:https://www.cnblogs.com/shuanglin/p/8986125.html

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