koa-connect/examples/logger.js

Use Connect/Express middleware in Koa

const Koa = require('koa')
const connect = require('connect')
const c2k = require('..')

const app = new Koa()
app.use(c2k(connect.logger('dev')))

app.use((ctx) => {
  ctx.body = 'koa'
})

app.listen(3000)