init commit

server.js

@@ -0,0 +1,65 @@
+import http from 'http';
+import https from 'https';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const PORT = 3000;
+
+const MIME = {
+  '.html': 'text/html',
+  '.js':   'application/javascript',
+  '.css':  'text/css',
+  '.json': 'application/json',
+};
+
+function proxyOnvista(req, res) {
+  const url = new URL(req.url, `http://localhost:${PORT}`);
+
+  // Forward all query params as-is to onvista
+  const upstream = `https://api.onvista.de/api/v1/bonds/finder/configuration_query?${url.searchParams.toString()}`;
+
+  const options = {
+    headers: {
+      'User-Agent': 'Mozilla/5.0',
+      'Accept': 'application/json',
+    }
+  };
+
+  https.get(upstream, options, upRes => {
+    let body = '';
+    upRes.on('data', chunk => body += chunk);
+    upRes.on('end', () => {
+      res.writeHead(upRes.statusCode, {
+        'Content-Type': 'application/json',
+        'Access-Control-Allow-Origin': '*',
+      });
+      res.end(body);
+    });
+  }).on('error', err => {
+    res.writeHead(502, { 'Content-Type': 'application/json' });
+    res.end(JSON.stringify({ error: err.message }));
+  });
+}
+
+function serveStatic(req, res) {
+  const filePath = path.join(__dirname, 'static', req.url === '/' ? 'index.html' : req.url);
+  const ext = path.extname(filePath);
+
+  fs.readFile(filePath, (err, data) => {
+    if (err) { res.writeHead(404); res.end('Not found'); return; }
+    res.writeHead(200, { 'Content-Type': MIME[ext] || 'text/plain' });
+    res.end(data);
+  });
+}
+
+const server = http.createServer((req, res) => {
+  if (req.url.startsWith('/api/bonds')) {
+    proxyOnvista(req, res);
+  } else {
+    serveStatic(req, res);
+  }
+});
+
+server.listen(PORT, () => console.log(`Bond Sniffer running at http://localhost:${PORT}`));