server.js
var http = require("http");
var url = require("url");
function start(route){//route.js 的route方法
 //服务实现
 function onRequest(request,response){
 var pathname = url.parse(request.url.).pathname;
 route(pathname); //
 
 response.writeHead(200,{"Content-Type":"text/plain"});
 response.write("只是一个练手罢了");
 response.end();
 }
 //创建服务
 http.createServer(onRequest).listen(8888);//端口号8888
 console.log("服务启动");//后台输出,表示服务启动成功
}
exports.start = start; //将start方法暴露出去
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route.js
function route(pathname){
 console.log("请求路径是:" + pathname); //后台查看请求路劲 区分请求的地址
}
exports.route = route;
========================================
index.js
var server = require("./server");
var router = require("./route");
server.start(router.route);//传递給start的是router的route方法