var http = require('http');
var koa = require('..');
var app = koa();

// logger

function logger(next){
  return function *(){
    var start = new Date;
    yield next;
    var ms = new Date - start;
    console.log('%s %s - %s', this.method, this.url, ms);
  }
}

// sometimes it's useful to apply some
// ad-hoc logic to enable middleware, for
// example ignoring a logger on asset requests:

app.use(function(next){
  return function *(){
    if (/(\.js|\.css|\.ico)$/.test(this.path)) {
      yield next;
    } else {
      this.body = 'Hello World';
      yield logger(next);
      yield next;
    }
  }
});

app.listen(3000);