运行后能生成评论，但评论显示是乱码，求指教
var http = require('http');
var querystring = require('querystring');
var postData = querystring.stringify({
'content':'老师讲得真好，这是追评！',
'cid':348,
});
var options = {
hostname:'www.imooc.com',
port:80,
path:'/course/docomment',
method:'POST',
headers:{
'Accept':'application/json, text/javascript, */*; q=0.01',
'Accept-Encoding':'gzip,deflate,sdch',
'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':'imooc_uuid=bccbd401-fc48-47c0-8ac0-72fccc9681be; imooc_isnew_ct=1474427933; loginstate=1; apsid=gyYjE4MDEcd7b1393990c78efdeebff3968=1482889141',
'Host':'www.imooc.com',
'Origin':'http://www.imooc.com',
'Referer':'http://www.imooc.com/comment/348',
'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 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();
运行后也没有执行console.log('评论完毕！')
求指教，谢谢！
