js写文件

var fs = require('fs'); fs.open("test.txt","w",0644,function(e,fd){    if(e)throw e;    fs.write(fd,"first fs!",0,'utf8',function(e){        if(e)throw e;        fs.closeSync(fd);    })});

var http = require('http');http.createServer(function (req, res) {  res.writeHead(200, {'Content-Type': 'text/plain'});  res.end('Hello World\n');}).listen(1337, '127.0.0.1');console.log('Server running at http://127.0.0.1:1337/');