var http = require('http')
var querystring = require('querystring')
var postData = querystring.stringify({
	'content':'i just want to test',
	'cid':348
})
var options ={
	hostname:'www.immoc.com',
	port:80,
	path:'/course/docomment',
	method:'POST',
	headers:{
		'Accept':'application/json, text/javascript, */*; q=0.01',
		'Accept-Encoding':'gzip, deflate',
		'Accept-Language':'zh-CN,zh;q=0.8',
		'Connection':'keep-alive',
		'Content-Length':postData.length,
		'Content-Type':'application/x-www-form-urlencoded; charset=UTF-8',
		'Cookie':'这里放的我的cookie',
		'Host':'www.imooc.com',
		'Origin':'http://www.imooc.com',
		'Referer':'http://www.imooc.com/comment/348',
		'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36',
		'X-Requested-With':'XMLHttpRequest'
	}
}

var req = http.request(options,function(res){
	console.log('Status: '+res.statusCode)
	console.log('headers: '+JSON.stringify(res.headers))
	
	res.on('data',function(chunk){
		console.log(Buffer.isBuffer(chunk))
		console.log(typeof chunk)
	})
	res.on('end',function(){
		console.log('评论完毕！')
	})
})
req.on('error',function(e){
		console.log('Error: '+e.message)
	})

req.write(postData)
req.end()

状态码 409