详解用Node.js实现Restful风格webservice

var express = require('express') //加载模块 
var app = express() //实例化之 
 
var map = {"1":{id:1,name:"test"},"2":{id:2,name:"test"}} //定义一个集合资源，key为字符串完全是模仿java MAP<T,E>，否则谁会这么去写个hash啊！ 
 
app.get('/devices',function(req, res){ //Restful Get方法,查找整个集合资源 
  res.set({'Content-Type':'text/json','Encodeing':'utf8'}); 
  res.send(map) 
}) 
app.get('/devices/:id',function(req, res){ //Restful Get方法,查找一个单一资源 
  res.set({'Content-Type':'text/json','Encodeing':'utf8'}); 
  res.send(map[req.param('id')]) 
  //console.log(req.param('id')) 
}) 
app.post('/devices/', express.bodyParser(), function(req, res){ //Restful Post方法,创建一个单一资源 
  res.set({'Content-Type':'text/json','Encodeing':'utf8'}); 
  map[req.body.id] = req.body 
  res.send({status:"suess",url:"/devices/"+req.body.id}) //id 一般由数据库产生 
}) 
app.put('/devices/:id', express.bodyParser(), function(req, res){ //Restful Put方法,更新一个单一资源 
  res.set({'Content-Type':'text/json','Encodeing':'utf8'}); 
  map[req.body.id] = req.body 
  res.send({status:"suess",url:"/devices/"+req.param('id'),device:req.body}); 
}) 
app.delete('/devices/:id',function(req, res){ //Restful Delete方法,删除一个单一资源 
  res.set({'Content-Type':'text/json','Encodeing':'utf8'}); 
  delete map[req.param('id')] 
  res.send({status:"suess",url:"/devices/"+req.param('id')}) 
  console.log(map) 
}) 
app.listen(8888); //监听8888端口，没办法，总不好抢了tomcat的8080吧！ 

{ get:  
  [ { path: '/', 
    method: 'get', 
    callbacks: [Object], 
    keys: [], 
    regexp: /^\/\/?$/i }, 
  { path: '/user/:id', 
    method: 'get', 
    callbacks: [Object], 
    keys: [{ name: 'id', optional: false }], 
    regexp: /^\/user\/(?:([^\/]+?))\/?$/i } ], 
delete:  
  [ { path: '/user/:id', 
    method: 'delete', 
    callbacks: [Object], 
    keys: [Object], 
    regexp: /^\/user\/(?:([^\/]+?))\/?$/i } ] } 

var routes = require('./routes') 
app.use(app.router);//保留原来的 
routes(app);//这个是新加的,将前者作为默认路由