出错啦，求解！！
代码：
var http = require('http')
var querystring = require('querystring')
var postData = querystring.stringify({
'content':'嗨呀下期再见吧',
"id":409472,
"uid":3021479
})
var options = {
hostname:'www.imooc.com',
port:80,
path:'/course/getcomment?mid=8837&page=1&r=0.9355340755338122',
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-Type":'application/x-www-form-urlencoded;charset=UTF-8',
'Cookie':'imooc_uuid=f6590fcb-6b94-4c4e-858a-36095af0fac1; imooc_isnew_ct=1490406066; loginstate=1; apsid=ExMDhjZDQ1Y2U5YjYxMDQ1NjFlNzRjYTkwZTNhNjgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMzAyMTQ3OQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAxNzY2MDU3ODk4QHFxLmNvbQAAAAAAAAAAAAAAAAAAADgwNDNiNGYyZmM0ZDU5YTg4OThhZjg1NTZlNzg4OTMzCXPWWAlz1lg%3DYz; last_login_username=1766057898%40qq.com; PHPSESSID=r2tekrtmou9arre4brbelr84b2; IMCDNS=0; Hm_lvt_f0cfcccd7b1393990c78efdeebff3968=1490789466,1491053729,1491056707,1491096295; Hm_lpvt_f0cfcccd7b1393990c78efdeebff3968=1491121852; imooc_isnew=2; cvde=58e052d379ca0-165',
'Host':'www.imooc.com',
'Referer':'http://www.imooc.com/video/8837',
'User-Agent':'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.110 Mobile Safari/537.36',
'X-Requested-With':'XMLHttpRequest'
}
}
var req = http.request(options, function (res) {
console.log('Status: ' + res.statusCode)
console.log('Status: ' + JSON.stringify(res.headers))
res.on('data', function (chunk) {
console.log(Buffer.isBuffer(chunk));
console.log(typeof chunk);
})
res.on('end',function () {
console.log('评论成功');
})
res.on('error', function (r) {
console.log('Error: '+ r.message);
})
})
req.write(postData)
req.end()
错误：
