一个简单的node.js界面实现方法

// filename:myServer.js// a simple http servervar fs = require('fs'), url = require('url'), path = require('path'), http = require('http');//从命令行参数获取root目录，默认是当前目录var root = path.resolve(process.argv[2] || '.');console.log('Static root dir: ' + root);//创建服务器var server = http.createServer(function (request, response) { //获取URL的路径 var pathname = url.parse(request.url).pathname, //获取对应的本地文件的路径 filepath = path.join(root, pathname); //获取文件状态 fs.stat(filepath, function (err, stats) { if (!err && stats.isFile()) {  console.log('200 ' + request.url);  //发送响应  response.writeHead(200);  //将文件流导向response  fs.createReadStream(filepath).pipe(response); } else {  console.log('404 ' + request.url);  response.writeHead(404);  response.end('404 Not Found'); } });});server.listen(8081);console.log('Server is running at http://127.0.0.1:8081/');