Labyricorn
e02d49a739
- Record user evidence for directory fallback to complete GC1 (10/10 checks passed) - Expand Format Specification 0.1 to Revision 0.2 with normative shared contracts - Author JSON Schema Draft-07 at schema/xzbt-0.1.schema.json - Implement zero-dependency semantic validator at tools/validate-exhibit.mjs - Create 12-case conformance fixture suite and automated test runner (12/12 passing) - Update implementation status, verification gates, and gap closure decisions - Add devlog entry covering stall recovery and Phase 0 current state
90 lines
2.8 KiB
JavaScript
90 lines
2.8 KiB
JavaScript
/**
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* Dependency-free local development server for XZBT.
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*
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* It deliberately binds only to loopback. It is not part of the distributed
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* XZBT artifact and cannot establish direct-file Phase 0 feasibility results.
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*/
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import { createReadStream, statSync } from 'node:fs';
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import { createServer } from 'node:http';
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import { extname, normalize, resolve, sep } from 'node:path';
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import { fileURLToPath } from 'node:url';
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const root = resolve(fileURLToPath(new URL('..', import.meta.url)));
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const host = '127.0.0.1';
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const loopbackAddresses = ['127.0.0.1', '::1'];
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const port = Number.parseInt(process.env.XZBT_DEV_PORT ?? '5173', 10);
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if (!Number.isInteger(port) || port < 1 || port > 65535) {
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throw new Error('XZBT_DEV_PORT must be an integer from 1 through 65535.');
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}
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const mimeTypes = new Map([
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['.css', 'text/css; charset=utf-8'],
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['.html', 'text/html; charset=utf-8'],
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['.js', 'text/javascript; charset=utf-8'],
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['.json', 'application/json; charset=utf-8'],
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['.mjs', 'text/javascript; charset=utf-8'],
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['.xzbt', 'application/json; charset=utf-8'],
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]);
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function requestedPath(requestUrl) {
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const pathname = new URL(requestUrl, `http://${host}:${port}`).pathname;
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const decodedPath = decodeURIComponent(pathname);
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if (decodedPath.includes('\0')) return null;
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if (decodedPath.split('/').some((segment) => segment.startsWith('.'))) return null;
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const relativePath = decodedPath === '/'
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? 'prototypes/phase0/XZBT-phase0-probe.html'
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: decodedPath.replace(/^\/+/, '');
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const candidate = resolve(root, normalize(relativePath));
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return candidate === root || candidate.startsWith(`${root}${sep}`) ? candidate : null;
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}
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function handleRequest(request, response) {
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if (!['GET', 'HEAD'].includes(request.method ?? '')) {
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response.writeHead(405, { Allow: 'GET, HEAD' }).end();
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return;
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}
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let path;
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try {
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path = requestedPath(request.url ?? '/');
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} catch {
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response.writeHead(400).end('Malformed request path.');
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return;
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}
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if (!path) {
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response.writeHead(403).end('Path is outside the XZBT workspace.');
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return;
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}
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let stats;
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try {
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stats = statSync(path);
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} catch {
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response.writeHead(404).end('Not found.');
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return;
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}
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if (!stats.isFile()) {
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response.writeHead(404).end('Not found.');
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return;
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}
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response.writeHead(200, {
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'Content-Length': stats.size,
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'Content-Type': mimeTypes.get(extname(path).toLowerCase()) ?? 'application/octet-stream',
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'Cache-Control': 'no-store',
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'X-Content-Type-Options': 'nosniff',
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});
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if (request.method === 'HEAD') response.end();
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else createReadStream(path).pipe(response);
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}
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for (const address of loopbackAddresses) {
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const server = createServer(handleRequest);
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server.listen(port, address, () => {
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console.log(`XZBT development server: http://${address}:${port}/`);
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});
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}
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console.log(`Serving workspace root: ${root}`);
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