如何虚拟域名重定向

RewriteEngine On
RewriteCond %{HTTP_HOST} ^old-domain\.com$ [NC]
RewriteRule ^(.*)$ http://new-domain.com/$1 [R=301,L]

server {
    server_name old-domain.com;
    return 301 $scheme://new-domain.com$request_uri;
}

<?php
if ($_SERVER['HTTP_HOST'] == 'old-domain.com') {
    header('Location: http://new-domain.com' . $_SERVER['REQUEST_URI'], true, 301);
    exit();
}
?>

const http = require('http');
const url = require('url');

const server = http.createServer((req, res) => {
    const parsedUrl = url.parse(req.url);
    if (req.headers.host === 'old-domain.com') {
        res.writeHead(301, { 'Location': `http://new-domain.com${parsedUrl.path}` });
        res.end();
    } else {
        // 处理其他请求
    }
});

server.listen(80);