koa-proxies

import Koa from 'koa'; import proxy from 'koa-proxies'; import httpsProxyAgent from 'https-proxy-agent'; // Install if needed: npm i https-proxy-agent const app = new Koa(); // Example 1: Basic proxy for a fixed path app.use(proxy('/api', { target: 'http://localhost:3001', // Your target API server changeOrigin: true, // Changes the origin of the host header to the target URL rewrite: path => path.replace('/api', ''), // Rewrites the path from /api/users to /users logs: true // Enables logging of proxy requests to console })); // Example 2: Dynamic proxy with path parameters app.use(proxy('/users/:id', (params, ctx) => { return { target: 'https://jsonplaceholder.typicode.com', // A public API for testing changeOrigin: true, rewrite: () => `/users/${params.id}`, // Dynamically rewrite path based on URL parameter logs: (ctx, target) => { console.log(`[Proxy Log] ${ctx.method} ${ctx.path} -> ${target}`); }, // Example of using a proxy agent (install 'https-proxy-agent' if needed) // agent: new httpsProxyAgent('http://your.proxy.server:port') // Remove if not using a proxy agent }; })); app.listen(3000, () => { console.log('Koa proxy server listening on http://localhost:3000'); console.log('Try visiting http://localhost:3000/api/posts/1 (proxies to http://localhost:3001/posts/1)'); console.log('Or http://localhost:3000/users/1 (proxies to https://jsonplaceholder.typicode.com/users/1)'); });