Web 服务器框架

表达

var express = require('express');
var app = express();

app.get('/', function (req, res) {
  res.send('Hello World!');
});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!');
});

还

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

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

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

app.listen(3000);