nodejs-websocket的基本使用
nodejs-websocket是nodejs的websocket模块
服务端：
var ws = require('nodejs-websocket');
var wsPort = 3000;
var peers = [];
var server = ws.createServer(function(conn){
peers.push(conn);
// 事件名称为text(读取字符串时，就叫做text)，读取客户端传来的字符串
var count = 1;
conn.on('text', function(str) {
// 在控制台输出前端传来的消息
console.log(str);
//向前端回复消息
//conn.sendText('服务器端收到客户端端发来的消息了！' + count++);
//群发
for(let i=0,len=peers.length;i<len;i++){
if(peers[i]!=conn){
peers[i].sendText('转发客户端的消息：'+str);
}
}
});
conn.on('close',(code, reason)=>{
console.log("Connection closed")
});
conn.on("error", function (code, reason) {
console.log("异常关闭")
});
});
server.listen(wsPort,'0.0.0.0',()=>{
console.log('websocket服务启动-使用端口',wsPort);
});客户端：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
url:<input />
<button onclick="svc_connectPlatform()"> connect</button><br/>
<br/>
<input />
<button > send</button>
<script>
var url = document.getElementById("url");
var sendbtn = document.getElementById("sendbtn");
var inputmsg = document.getElementById("msg");
sendbtn.onclick = function(){
svc_send(inputmsg.value);
}
function svc_connectPlatform() {
//alert("");
var wsServer = url.value.trim();
try {
svc_websocket = new WebSocket(wsServer);
} catch (evt) {
console.log("new WebSocket error:" + evt.data);
svc_websocket = null;
if (typeof(connCb) != "undefined" && connCb != null)
connCb("-1", "connect error!");
return;
}
//alert("");
svc_websocket.onopen = svc_onOpen;
svc_websocket.onclose = svc_onClose;
svc_websocket.onmessage = svc_onMessage;
svc_websocket.onerror = svc_onError;
}
function svc_onOpen(evt) {
console.log("Connected to WebSocket server.");
}
function svc_onClose(evt) {
console.log("Disconnected");
}
function svc_onMessage(evt) {
console.log('Retrieved data from server: ' + evt.data);
}
function svc_onError(evt) {
console.log('Error occured: ' + evt.data);
}
function svc_send(msg) {
if (svc_websocket.readyState == WebSocket.OPEN) {
svc_websocket.send(msg);
} else {
console.log("send failed. websocket not open. please check.");
}
}
</script>
</body>
</html>