http-proxy-middleware

import express from 'express'; import { createProxyMiddleware, Options } from 'http-proxy-middleware'; const app = express(); const port = 3000; // Configuration for the proxy middleware const apiProxyOptions: Options = { target: 'http://jsonplaceholder.typicode.com', // target host changeOrigin: true, // needed for virtual hosted sites ws: true, // proxy websockets pathRewrite: { '^/api': '', // rewrite path: remove `/api` prefix when forwarding to target }, onProxyReq: (proxyReq, req, res) => { // Optional: Log proxy request details or modify headers console.log(`[Proxy] Proxying request: ${req.method} ${req.url} -> ${proxyReq.path}`); }, onProxyRes: (proxyRes, req, res) => { // Optional: Log proxy response details or modify response headers console.log(`[Proxy] Received response for: ${req.url} with status: ${proxyRes.statusCode}`); }, onError: (err, req, res, target) => { console.error(`[Proxy Error] ${err.message}`); res.status(500).send('Proxy Error'); } }; // Apply the proxy middleware to '/api' route app.use('/api', createProxyMiddleware(apiProxyOptions)); // Basic route for the main application app.get('/', (req, res) => { res.send('Hello from the main application!'); }); app.listen(port, () => { console.log(`Server listening at http://localhost:${port}`); console.log(`Try accessing http://localhost:${port}/api/todos/1`); }); // To run this: // 1. npm init -y // 2. npm install express http-proxy-middleware @types/express @types/http-proxy-middleware typescript ts-node // 3. Add "start": "ts-node app.ts" to package.json scripts // 4. npm start