const Koa = require('koa');
const etag = require('@koa/etag');
const conditional = require('koa-conditional-get');
const compress = require('koa-compress');

const app = new Koa();

// must be used before `conditional` and `etag`
app.use(compress());

// etag works together with conditional-get
app.use(conditional());
app.use(etag());

app.use(function (ctx) {
  ctx.body = 'Hello World';
});

app.listen(3000);

console.log('listening on port 3000');