后端node代碼:
var?ws?=?require("nodejs-websocket")
var?port=3000;
//?Scream?server?example:?"hi"?->?"HI!!!"
var?server?=?ws.createServer(function?(conn)?{
console.log("New?connection")
conn.on("text",?function?(str)?{
console.log(str)
conn.sendText(str.toUpperCase()+"!!!")
})
conn.on("close",?function?(code,?reason)?{
console.log("Connection?closed")
})
conn.on("error",?function?(err)?{
console.log("handdle?error");
console.log(err);
})
//?setInterval(()?=>?{
//?????conn.sendText('123')
//?},?2000);
}).listen(port);
console.log("websocket?server?listening?on?port?"+port);
前端html代碼：
websocket
echo?test
發(fā)送
var?websocket=new?WebSocket("ws://localhost:3000");
websocket.onopen=function(){
document.getElementById("recv").innerHTML="connected";
}
websocket.onclose=function(){
console.log("websocket?close");
}
websocket.onmessage=function(e){
console.log(e.data);
document.getElementById("recv").innerHTML=e.data;
}
document.getElementById("sendBtn").onclick=function(){
var?txt=document.getElementById("sendText").value;
websocket.send(txt);
}
node先下載一個(gè)nodejs-websocket包，然后運(yùn)行js文件，
然后前端文件點(diǎn)擊發(fā)送消息，后端就可以接收實(shí)時(shí)返回
