express 框架的 hello world 例子

app.js

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

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

var server = app.listen(3000);

// 浏览器访问 http://127.0.0.1:3000/hello.txt
// 响应报文
/*
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/html; charset=utf-8
Content-Length: 11
ETag: W/"b-4a17b156"
Date: Fri, 07 Nov 2014 14:11:43 GMT
Connection: keep-alive

Hello World
*/