http2-proxy

import http2 from 'http2'; import proxy from 'http2-proxy'; import finalhandler from 'finalhandler'; const port = 8000; const targetHostname = 'localhost'; const targetPort = 9001; // Ensure a backend server is running on this port for testing const defaultWebHandler = (err, req, res) => { if (err) { console.error('HTTP proxy error:', err.message); // Log error message for clarity if (!res.headersSent) { finalhandler(req, res)(err); } else { // If headers already sent, just end the response to prevent further errors res.end(); } } }; const defaultWsHandler = (err, req, socket, head) => { if (err) { console.error('WebSocket proxy error:', err.message); socket.destroy(); } }; const server = http2.createServer({ allowHTTP1: true }); server.on('request', (req, res) => { proxy.web(req, res, { hostname: targetHostname, port: targetPort, // Optional: Add custom headers to the request sent to the target onReq: (proxyReq, options) => { options.headers['x-forwarded-for'] = req.socket.remoteAddress; options.headers['x-custom-proxy-header'] = 'http2-proxy-example'; }, // Optional: Modify the response from the target before sending to client onRes: (req, res, proxyRes) => { res.setHeader('x-proxied-by', 'http2-proxy'); res.writeHead(proxyRes.statusCode, proxyRes.headers); proxyRes.pipe(res); } }, defaultWebHandler); }); server.on('upgrade', (req, socket, head) => { proxy.ws(req, socket, head, { hostname: targetHostname, port: targetPort }, defaultWsHandler); }); server.listen(port, () => { console.log(`Proxy server listening on port ${port}`); console.log(`Proxying HTTP and WebSocket requests to ${targetHostname}:${targetPort}`); });