nodejs get/request

灌水评论示例：

var http = require('http');
var querystring = require('querystring');

var postData = querystring.stringify({
    content: '不错不错',
    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',
        '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=791e8f39-5d06-433a-831f-909fa85acdd3; imooc_isnew_ct=1452475309; IMCDNS=0; loginstate=1; apsid=A0NWQzM2RkMzM2NDk0NWFkOTc5NmQzYzBkNTUyMGMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMjc0Njc4MAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADBlY2Y5ZjJiZGNjZTFlZTJmMjkwZTE2Y2M4YWE4MWE49QOTVvUDk1Y%3DZD; PHPSESSID=1uunfnq1rdhup7tudcre36l8h1; jwplayer.qualityLabel=高清; cvde=569454113f947-13; Hm_lvt_f0cfcccd7b1393990c78efdeebff3968=1452475311,1452561427; Hm_lpvt_f0cfcccd7b1393990c78efdeebff3968=1452579983; imooc_isnew=2',
        '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; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.99 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();