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Give Google unique snippets and FAQ rich results, and keep robots/sitemap from being cached as HTML. Co-authored-by: Cursor <cursoragent@cursor.com>
106 lines
3.3 KiB
JavaScript
106 lines
3.3 KiB
JavaScript
import { createReadStream, existsSync, statSync } from 'node:fs';
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import { createServer } from 'node:http';
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import { extname, join, resolve, sep } from 'node:path';
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import { fileURLToPath } from 'node:url';
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const root = resolve(fileURLToPath(new URL('./dist', import.meta.url)));
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const port = Number(process.env.PORT) || 3000;
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const host = process.env.HOST || '0.0.0.0';
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const MIME = {
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'.css': 'text/css; charset=utf-8',
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'.html': 'text/html; charset=utf-8',
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'.ico': 'image/x-icon',
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'.js': 'text/javascript; charset=utf-8',
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'.json': 'application/json; charset=utf-8',
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'.map': 'application/json; charset=utf-8',
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'.png': 'image/png',
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'.svg': 'image/svg+xml',
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'.txt': 'text/plain; charset=utf-8',
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'.webp': 'image/webp',
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'.woff': 'font/woff',
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'.woff2': 'font/woff2',
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'.xml': 'application/xml; charset=utf-8',
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};
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const SPA_ROUTES = new Set(['/', '/docs', '/contribute', '/community']);
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function requestPath(urlPath) {
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const decoded = decodeURIComponent((urlPath ?? '/').split('?')[0] || '/');
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if (decoded.length > 1 && decoded.endsWith('/')) return decoded.slice(0, -1) || '/';
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return decoded || '/';
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}
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function isSpaRoute(urlPath) {
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return SPA_ROUTES.has(requestPath(urlPath));
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}
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function fileUnderRoot(urlPath) {
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const decoded = decodeURIComponent((urlPath ?? '/').split('?')[0] || '/');
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const relative = decoded.replace(/^\/+/, '').replaceAll('/', sep);
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const resolved = resolve(root, relative);
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const prefix = root.endsWith(sep) ? root : root + sep;
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if (resolved !== root && !resolved.startsWith(prefix)) return null;
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return resolved;
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}
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function send(res, status, body, type = 'text/plain; charset=utf-8') {
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res.writeHead(status, { 'Content-Type': type, 'Cache-Control': 'no-cache' });
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res.end(body);
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}
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const server = createServer((req, res) => {
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if (req.method === 'GET' && (req.url === '/healthz' || req.url?.startsWith('/healthz?'))) {
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send(res, 200, 'ok');
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return;
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}
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if (req.method !== 'GET' && req.method !== 'HEAD') {
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send(res, 405, 'Method not allowed');
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return;
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}
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const candidate = fileUnderRoot(req.url ?? '/');
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if (!candidate) {
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send(res, 400, 'Bad request');
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return;
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}
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let file = candidate;
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let status = 200;
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if (existsSync(file) && statSync(file).isDirectory()) {
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const nested = join(file, 'index.html');
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file = existsSync(nested) ? nested : join(root, 'index.html');
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} else if (!existsSync(file)) {
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const notFound = join(root, '404.html');
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file = existsSync(notFound) && !isSpaRoute(req.url ?? '/') ? notFound : join(root, 'index.html');
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if (!isSpaRoute(req.url ?? '/')) status = 404;
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}
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if (!existsSync(file)) {
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send(res, 500, 'dist/ missing — run npm run build before start');
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return;
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}
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const type = MIME[extname(file).toLowerCase()] ?? 'application/octet-stream';
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const headers = { 'Content-Type': type };
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const base = file.replace(/\\/g, '/');
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if (base.endsWith('/robots.txt') || base.endsWith('/sitemap.xml')) {
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headers['Cache-Control'] = 'public, max-age=300';
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}
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res.writeHead(status, headers);
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if (req.method === 'HEAD') {
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res.end();
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return;
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}
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createReadStream(file).pipe(res);
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});
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if (!existsSync(join(root, 'index.html'))) {
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console.error('dist/index.html missing — run npm run build before start');
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process.exit(1);
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}
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server.listen(port, host, () => {
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console.log(`LexAI website listening on http://${host}:${port}`);
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});
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