nodejs学习笔记(1)

index.js:

var server=require("./server")var router=require("./router")server.start(router.route)

server.js:

//从nodejs获取http对象并赋值给本地变量httpvar http=require("http")//同上var url=require("url")// http.createServer(function(request,response){// console.log("ok")// response.writeHead(200,{"Content-Type":"text/plain"})// response.write("hello world") // response.end()// }).listen(8888)function start(route){ function onRequest(request,response){ var pathname=url.parse(request.url).pathname; console.log("request for "+pathname+"received") route(pathname) response.writeHead(200,{"Content-Type":"text/plain"}) response.write("hello world") response.end() } http.createServer(onRequest).listen(8888) console.log("server has started")}exports.start=start

router.js:

function route(pathname){ console.log("about to route a request for "+pathname)}exports.route=route;

总体分析:index.js  变量server，router 分别获取js模块。

server模块:获取nodejs对象http和url。定义一个start函数,唯一参数是一个函数route.函数内部也有一个函数onRequest.有两个参数，request,response(均为nodejs对象)。语句var pathname=url.parse(request.url).pathname--解析url

route(pathname)调用router.js。调用route(pathname)函数。response.writeHead(200,{"content-type":"text/plain"}).response.write("hello world").最后response.end()

心得:js匿名函数可以多加使用

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