Node Express listen和http createServer区别

• 两种实现效果相同
• 通过http创建，可以在express基础上使用更多http功能
• 通过http创建，更便于扩展至https服务器

express:

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

//app.configure, app.use etc

app.listen(80);

http:

var express = require('express'), http = require('http');
var app = express();
var server = http.createServer(app);

//app.configure, app.use etc

server.listen(80);