astro/examples/ssr/server/server.mjs

import { createServer } from 'http';
import fs from 'fs';
import mime from 'mime';
import { loadApp } from 'astro/app/node';
import { polyfill } from '@astrojs/webapi';
import { apiHandler } from './api.mjs';

polyfill(globalThis);

const clientRoot = new URL('../dist/client/', import.meta.url);
const serverRoot = new URL('../dist/server/', import.meta.url);
const app = await loadApp(serverRoot);

async function handle(req, res) {
	const route = app.match(req);

	if (route) {
		/** @type {Response} */
		const response = await app.render(req, route);
		const html = await response.text();
		res.writeHead(response.status, {
			'Content-Type': 'text/html; charset=utf-8',
			'Content-Length': Buffer.byteLength(html, 'utf-8'),
		});
		res.end(html);
	} else if (/^\/api\//.test(req.url)) {
		return apiHandler(req, res);
	} else {
		let local = new URL('.' + req.url, clientRoot);
		try {
			const data = await fs.promises.readFile(local);
			res.writeHead(200, {
				'Content-Type': mime.getType(req.url),
			});
			res.end(data);
		} catch {
			res.writeHead(404);
			res.end();
		}
	}
}

const server = createServer((req, res) => {
	handle(req, res).catch((err) => {
		console.error(err);
		res.writeHead(500, {
			'Content-Type': 'text/plain',
		});
		res.end(err.toString());
	});
});

server.listen(8085);
console.log('Serving at http://localhost:8085');

// Silence weird <time> warning
console.error = () => {};