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github.com-olahol-melody-websocket框架

事件驱动异步处理的 websocket 框架,类似 java 中的 netty 框架,以下是 demo:

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package main

import (
"net/http"

"github.com/gin-gonic/gin"
"github.com/olahol/melody"
)

func main() {
r := gin.Default()
m := melody.New()

r.GET("/", func(c *gin.Context) {
http.ServeFile(c.Writer, c.Request, "index.html")
})

r.GET("/channel/:name", func(c *gin.Context) {
http.ServeFile(c.Writer, c.Request, "chan.html")
})

r.GET("/channel/:name/ws", func(c *gin.Context) {
m.HandleRequest(c.Writer, c.Request)
})

m.HandleMessage(func(s *melody.Session, msg []byte) {
m.BroadcastFilter(msg, func(q *melody.Session) bool {
return q.Request.URL.Path == s.Request.URL.Path
})
})

r.Run(":5000")
}
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<html>
<head>
<title>Melody example: chatting</title>
</head>

<style>
#chat {
text-align: left;
background: #f1f1f1;
width: 500px;
min-height: 300px;
padding: 20px;
}
</style>

<body>
<center>
<h3>Chat</h3>
<pre id="chat"></pre>
<input placeholder="say something" id="text" type="text">
</center>

<script>
var url = "ws://" + window.location.host + "/ws";
var ws = new WebSocket(url);
var name = "Guest" + Math.floor(Math.random() * 1000);

var chat = document.getElementById("chat");
var text = document.getElementById("text");

var now = function () {
var iso = new Date().toISOString();
return iso.split("T")[1].split(".")[0];
};

ws.onmessage = function (msg) {
var line = now() + " " + msg.data + "\n";
chat.innerText += line;
};

text.onkeydown = function (e) {
if (e.keyCode === 13 && text.value !== "") {
ws.send("<" + name + "> " + text.value);
text.value = "";
}
};

</script>
</body>
</html>