开门见山看需求：
搭建一个静态服务器，具备路由功能，结构如下
- sample->test.html
- index.js
- README.md
index.js代码如下：
var http = require('http')
var fs = require('fs')
var path = require('path')
var url = require('url')
//载入require模板
//创建服务器
var server= http.createServer(function(request,response){
setTimeout(function(){
response.setHeader('Content-Type','text/html; charset=utf-8')
response.writeHead(200, 'haha')
var pathObj = url.parse(request.url,true)
console.log(pathObj)
console.log(request.url)
//解析路由
switch(pathObj.pathname){
case '/getTemperature': //url有/getTemperature后缀返回数据
var ret
if(pathObj.query.city == 'Fujian'){
ret = {
city: 'Fujian',
temperature: '25'
}
}else{
ret = {
city: pathObj.query.city,
temperature: '我啷个晓得'
}
}
response.end(JSON.stringify(ret))
break;
case '/user/123': //url有/user/123后缀返回README文件
response.end( fs.readFileSync(__dirname + '/README.md') )
break;
//默认返回静态文件
default: response.end(fs.readFileSync(__dirname+'/sample'+'/test.html'))
}}),2000})
console.log('open http://localhost:8080')
server.listen(8080)
输入http://localhost:8080/getTemperature?city=Fujian 得到{city:Fujian,teperature:25}
输入http://localhost:8080/getTemperature?city=Beijing 得到{city:Beijing,teperature:我啷个晓得}
输入http://localhost:8080/user/123 返回README文件
输入http://localhost:8080 默认返回sample中test文件
如此一来，具备路由功能的简单的服务器就完成了。
