nodejs 使用nodejs-websocket模块实现点对点实时通讯
1、首先安装好nodejs-websocket
npm install nodejs-websocket --save -g
2、编写服务端
var ws = require("nodejs-websocket")
var AllUserData = new Array()
// Scream server example: "hi" -> "HI!!!"
var server = ws.createServer(function (conn) {
console.log("New connection")
conn.on("text", function (str) {
console.log("Received "+str)
AllUserData.push({
'id':str,
'ws':conn
})
conn.sendText(str.toUpperCase()+"!!!")
})
conn.on("close", function (code, reason) {
console.log("Connection closed")
// 当用户退出的时候捕捉到退出的用户
for (var i=0 in AllUserData) {
if (AllUserData[i].ws == conn) {
console.log(AllUserData[i])
}
}
})
}).listen(8001)3、简易客户端
<!DOCTYPE html>
<html>
<head>
<title>django-websocket</title>
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script type="text/javascript">//<![CDATA[
$(function () {
$('#connect_websocket').click(function () {
if (window.s) {
window.s.close()
}
/*创建socket连接*/
var socket = new WebSocket("ws://127.0.0.1:8001");
socket.onopen = function () {
console.log('WebSocket open');//成功连接上Websocket
};
socket.onmessage = function (e) {
console.log('message: ' + e.data);//打印出服务端返回过来的数据
$('#messagecontainer').prepend('<p>' + e.data + '</p>');
};
// Call onopen directly if socket is already open
if (socket.readyState == WebSocket.OPEN) socket.onopen();
window.s = socket;
});
$('#send_message').click(function () {
//如果未连接到websocket
if (!window.s) {
alert("websocket未连接.");
} else {
window.s.send($('#message').val());//通过websocket发送数据
}
});
$('#close_websocket').click(function () {
if (window.s) {
window.s.close();//关闭websocket
console.log('websocket已关闭');
}
});
});
//]]></script>
</head>
<body>
<br>
<input type="text" id="message" value="user1"/>
<button type="button" id="connect_websocket">连接 websocket</button>
<button type="button" id="send_message">发送 message</button>
<button type="button" id="close_websocket">关闭 websocket</button>
<h1>Received Messages</h1>
<div id="messagecontainer">
</div>
</body>
</html>总结
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