koa-rewrite-75lb

import Koa from 'koa'; import rewrite from 'koa-rewrite'; import Router from '@koa/router'; const app = new Koa(); const router = new Router(); // Middleware order matters: rewrite before router app.use(rewrite(/^\/i(\d+)/, '/items/$1')); app.use(rewrite('/:src..:dst', '/commits/:src/to/:dst')); app.use(rewrite('/js/(.*)', '/public/assets/js/$1')); // Example: /js/main.js -> /public/assets/js/main.js router.get('/items/:id', (ctx) => { ctx.body = `Item ID: ${ctx.params.id}`; }); router.get('/commits/:src/to/:dst', (ctx) => { ctx.body = `Commits from ${ctx.params.src} to ${ctx.params.dst}`; }); router.get('/public/assets/js/:path*', (ctx) => { ctx.body = `Serving static JS file: /public/assets/js/${ctx.params.path}`; }); router.get('/', (ctx) => { ctx.body = 'Hello, Koa Rewrite!'; }); app.use(router.routes()).use(router.allowedMethods()); const PORT = process.env.PORT ?? 3000; app.listen(PORT, () => { console.log(`Koa server running on http://localhost:${PORT}`); console.log('Try:'); console.log(`- http://localhost:${PORT}/i123 (should rewrite to /items/123)`); console.log(`- http://localhost:${PORT}/foo..bar (should rewrite to /commits/foo/to/bar)`); console.log(`- http://localhost:${PORT}/js/vendor/library.js (should rewrite to /public/assets/js/vendor/library.js)`); });