完整代码
1.requestHandles.js
function start(response){
    console.log("start has been request");
    function sleep(mis){
        var start = new Date().getTime();
        while(new Date().getTime()-start<mis)
        {}
    }
    sleep(10000);
    response.writeHead(200,{"Content-Type":"text/plain"});
    response.write("hello this is  start");
    response.end();
}

function upload(response){
    console.log("upload has been request");
    response.writeHead(200,{"Content-Type":"text/plain"});
    response.write("hello upload");
    response.end(); 
}
exports.start = start;
exports.upload = upload;

2.server.js

var http = require("http");
var url = require("url");
function start(route,handles){
    function onRequest(request,response){
        var pathname = url.parse(request.url).pathname;
        route(pathname,handles,response);
    }
    http.createServer(onRequest).listen(8080);
    console.log("server has been work");
}
exports.start = start;

3.router.js

function route(pathname,handles,response){
    console.log(pathname+" has been request!");
    if(typeof handles[pathname] == "function"){
        handles[pathname](response);
    }
    else{
        console.log("404");
    }
}
exports.route = route;

index.js

var server = require("./server");
var router = require("./router");
var requestHandles = require("./requestHandles");
var handles = [];
handles["/"] = requestHandles.start;
handles["/start"] = requestHandles.start;
handles["/upload"] = requestHandles.upload;
server.start(router.route,handles);