gitnexus-explorer

1/**2 * GitNexus reverse proxy — serves production web UI + proxies /api/* to backend.3 * Zero dependencies, Node.js built-ins only.4 *5 * Usage: node proxy.mjs <dist-dir> [port]6 *   dist-dir: path to gitnexus-web/dist (production build)7 *   port: listen port (default: 8888)8 *9 * Environment:10 *   API_PORT: GitNexus serve backend port (default: 4747)11 */12import http from 'node:http';13import fs from 'node:fs';14import path from 'node:path';15 16const API_PORT = parseInt(process.env.API_PORT || '4747');17const DIST_DIR = process.argv[2] || './dist';18const PORT = parseInt(process.argv[3] || '8888');19 20const MIME = {21  '.html': 'text/html',22  '.js': 'application/javascript',23  '.css': 'text/css',24  '.json': 'application/json',25  '.png': 'image/png',26  '.svg': 'image/svg+xml',27  '.ico': 'image/x-icon',28  '.woff2': 'font/woff2',29  '.woff': 'font/woff',30  '.wasm': 'application/wasm',31  '.ttf': 'font/ttf',32  '.map': 'application/json',33};34 35function proxyToApi(req, res) {36  const opts = {37    hostname: '127.0.0.1',38    port: API_PORT,39    path: req.url,40    method: req.method,41    headers: { ...req.headers, host: `127.0.0.1:${API_PORT}` },42  };43  const proxy = http.request(opts, (upstream) => {44    res.writeHead(upstream.statusCode, upstream.headers);45    upstream.pipe(res, { end: true });46  });47  proxy.on('error', () => {48    res.writeHead(502, { 'Content-Type': 'text/plain' });49    res.end('GitNexus backend unavailable — is `npx gitnexus serve` running?');50  });51  req.pipe(proxy, { end: true });52}53 54function serveStatic(req, res) {55  const urlPath = req.url.split('?')[0];56  let filePath = path.join(DIST_DIR, urlPath === '/' ? 'index.html' : urlPath);57 58  // SPA fallback: if file doesn't exist and isn't a static asset, serve index.html59  if (!fs.existsSync(filePath) && !path.extname(filePath)) {60    filePath = path.join(DIST_DIR, 'index.html');61  }62 63  const ext = path.extname(filePath);64  const mime = MIME[ext] || 'application/octet-stream';65 66  try {67    const data = fs.readFileSync(filePath);68    res.writeHead(200, {69      'Content-Type': mime,70      'Cache-Control': ext === '.html' ? 'no-cache' : 'public, max-age=86400',71    });72    res.end(data);73  } catch {74    res.writeHead(404, { 'Content-Type': 'text/plain' });75    res.end('Not found');76  }77}78 79const server = http.createServer((req, res) => {80  if (req.url.startsWith('/api')) {81    proxyToApi(req, res);82  } else {83    serveStatic(req, res);84  }85});86 87server.listen(PORT, () => {88  console.log(`GitNexus proxy listening on http://localhost:${PORT}`);89  console.log(`  Web UI: http://localhost:${PORT}/`);90  console.log(`  API:    http://localhost:${PORT}/api/repos`);91  console.log(`  Backend: http://127.0.0.1:${API_PORT}`);92});93