Node/外部ファイル表示

var http = require("http");
var fs = require("fs");
var server = http.createServer();
server.on("request", function(req, res){
	fs.readFile("./sample.html", "utf-8", function(err, data){
		if(err){
			res.writeHead(404, {"Content-Type": "text/plain"});
			res.write("not found");
			return res.end();
		}
		res.writeHead(200, {"Content-Type": "text/html"});
		res.write(data);
		res.end();
	});
})
server.listen(2000);
console.log("server listening");