// app.js
const http = require('http');
const fs = require('fs');
let server = http.createServer();
server.on('request', (req, res)=>{
if(req.url === '/'){
fs.readFile('./index.html', (err, data)=>{
res.writeHead(200,{'content-type':'text/html;charset=utf-8'});
res.end(data);
})
}else if(req.url === '/test' && req.method ==='GET'){
res.writeHead(200,{'content-type':'application/octet-stream'});
setInterval(function() {
res.write(''+ Date.Now()+ '^_^');
},1000);
}
req.on('data', (data)=>{
console.log(data.toString());
})
});
server.listen(9999, ()=>{
console.log('服务器9999 已开启');
})
<!-- index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
<Meta charset="UTF-8">
<Meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<span id='info'></span>
<button id='btn'>点我发</button>
</body>
<script>
var info = document.querySelector('#info');
document.querySelector('#btn').onclick = function(){
var xhr = new XMLHttpRequest();
xhr.open('get', '/test');
xhr.send();
xhr.onreadystatechange = function(){
console.log(xhr.readyState); //1,2,3,4
console.log(xhr.responseText);
var arr = xhr.responseText.split('^_^')
console.log(arr[arr.length-2]);
info.innerText = arr[arr.length-2];
}
}
</script>
</html>
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