一：效果
打开两个浏览器页面，
第一个浏览器页面输入：http://localhost:8888/upload
第一个浏览器页面输入：http://localhost:8888/start
然后，依次点击进入页面。
隔10秒后，两个页面会依次打开
二：环境
windows7、nodejs
三：代码
1.目录
2.运行文件 index.js
1 var server = require("./server01");
2 var router = require('./router');
3 var requestHandlers = require('./requestHandlers');
4
5 var handle = {}
6 handle["/"] = requestHandlers.start;
7 handle["/start"] = requestHandlers.start;
8 handle["/upload"] = requestHandlers.upload;
9 server.start(router.route, handle);
3.路由文件 router.js
1 function route(handle, pathname){
2 console.log('About to route a request for ' + pathname );
3 if(typeof handle[pathname] === 'function' ){
4 return handle[pathname]();
5 }else{
6 console.log('No request handler found for ' + pathname);
7 return '404 not found';
8 }
9 }
10
11 exports.route = route;
4.server01.js
1 var http = require("http");
2 var url = require('url');
3
4 function start(route, handle){
5 function onRequest(req, res){
6 console.log('Star : ');
7 var pathname = url.parse(req.url).pathname;
8
9 console.log('Request for \'' + pathname + '\' received');
10
11 var content = route(handle, pathname);
12
13 res.writeHead(200, {'Content-Type' : 'text/plain'});
14 res.end(content);
15 }
16
17 http.createServer(onRequest).listen(8888,'127.0.0.1');
18 }
19
20 exports.start = start;
4.requestHandlers.js
1 function start(){
2 console.log(" Request Handler 'start' was called ");
3 function sleep(milliSeconds){
4 var startTime = new Date().getTime();
5 while(new Date().getTime() < startTime + milliSeconds);
6 }
7 sleep(10000);
8 return "hello Start";
9 }
10
11 function upload(){
12 console.log(" Request Handler 'upload' was called ");
13 return "hello Upload";
14 }
15
16 exports.start = start ;
17 exports.upload = upload ;
来源：https://www.cnblogs.com/maduar/p/4564497.html