~~~ const Koa = require('koa'); const logger = require('koa-logger'); const session = require('koa-session'); const app = new Koa(); app.keys=['Hi Luke']; app.use(logger()); app.use(session(app)); app.use(ctx=>{ if(ctx.path==='/favicon.ico') return; let n = ctx.session.views || 0; ctx.session.views =++n; ctx.body = n+'views' }) app.listen(8080) ~~~