背景
使用的 golang.org/x/net/websocket 包，前端一发来消息就报错
if err = websocket.Message.Receive(ws, &msg); err != nil {
vlog.Error("接收消息错误：", err)
return
}
报错：
接收消息错误： EOF
排查
先排除了下网络问题，发现是OK的。
反复看了下代码,感觉没啥问题啊，于是搜了个demo。
https://www.cnblogs.com/lanyangsh/p/9190296.html
改了下：
package main
import (
"fmt"
"golang.org/x/net/websocket"
"log"
"net/http"
)
func Echo(ws *websocket.Conn) {
var err error
for {
var reply string
//websocket接受信息
if err = websocket.Message.Receive(ws, &reply); err != nil {
fmt.Println("receive failed:", err)
break
}
fmt.Println("reveived from client: " + reply)
msg := "received:" + reply
fmt.Println("send to client:" + msg)
//这里是发送消息
if err = websocket.Message.Send(ws, msg); err != nil {
fmt.Println("send failed:", err)
break
}
}
}
func main() {
//接受websocket的路由地址
http.Handle("/websocket", websocket.Handler(Echo))
if err := http.ListenAndServe(":1234", nil); err != nil {
log.Fatal("ListenAndServe:", err)
}
}
前端：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>go测试socket</title>
</head>
<body>
<script type="text/javascript">
var sock = null;
var wsuri = "ws://127.0.0.1:8635/turntable";
window.onload = function() {
console.log("onload");
sock = new WebSocket(wsuri);
sock.onopen = function() {
console.log("connected to " + wsuri);
}
sock.onclose = function(e) {
console.log("connection closed (" + e.code + ")");
}
sock.onmessage = function(e) {
console.log("message received: " + e.data);
}
};
function send() {
var msg = document.getElementById('message').value;
sock.send(msg);
};
</script>
<h1>WebSocket Echo Test</h1>
<form>
<p>
Message: <input id="message" type="text" value="Hello, world!">
</p>
</form>
<button onclick="send();">Send Message</button>
</body>
</html>
然后发现自己调用是好的。发给前端，让他本机调用，也是好的。
于是。。。前端发现是自己的定时器时间没写，所以一连就断开了。。。
总结
- 先排除基本问题，比如网络、防火墙。
- 写demo，验证问题在哪里。
- EOF是断开就会触发。