http服务器端：

var http = require('http');var server = http.createServer();server.on('request', function(req, res) {  res.writeHead(200, {    'Content-Type': 'text/plain',    'Content-Control':'max-age=3600'  });  res.write('Hello Worldddd');  res.end(req.url);});server.listen(4000);

http客户端代码：

var http = require('http');var util = require('util');var options = {  host:'localhost',  port:4000,  path:'/system.txt',  method:'POST'}var request = http.request(options,function(response){  response.setEncoding('utf8')  response.on('data',function(data){    console.log(data);  })})request.end();

结果：