koa路由

const Koa = require('koa')
const Router = require('koa-router')

const app = new Koa()

const user = new Router()
user.get('/', ctx => { // 路由是/user/...
  ctx.body = 'user'
})

const article = new Router()
article.get('/', ctx => { // 路由是/article/...
  ctx.body = 'article'
})

const router = new Router()
router.use('/user', user.routes());
router.use('/article', article.routes());

app.use(router.routes());

app.listen(3000, () => {
  console.log('server is starting at port 3000');
});