nodejs发送post请求

var http = require('http');
var querystring =require('querystring');
var post_data = querystring.stringify({
                        'wifi_name':'user',
                        'code':'123456'
                });
var options = {
                   hostname:'www.myserver.com',     //此处不能写协议，如 ： http://,https://  否则会报错
                   port:80,
                   path:'/user/bundle',
                   method:'POST',
                   headers: {
                        'Content-Type':'application/x-www-form-urlencoded',
                        'Content-Length': post_data.length
                   }
               };
var req = http.request(options,function(res){
                        console.log('STATUS:'+res.statusCode);
                        console.log('HEADERS:'+JSON.stringify(res.headers));
                        res.setEncoding('utf8');
                        res.on('data',function(chunk){
                                console.log('BODY:'+chunk);
                        });
           });
// write data to request body
req.write(post_data);
req.end();

若options里面的hostname 写了协议，会产生如下报错：

events.js:72

        throw er;  // Unhandled 'error' event 

                   ^

Error: getaddrinfo ENOTFOUND

详细内容可以参考：    http://stackoverflow.com/questions/17690803/node-js-getaddrinfo-enotfound