niconamacomment.js

var http = require('http');
var https = require('https');
var parseString = require('xml2js').parseString;
var net = require('net');

var nicoLogin = function() {
    var buf = new Buffer('mail=hoge&password=pass');
    var options = {
        host: 'secure.nicovideo.jp',
        path: '/secure/login?site=niconico',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Content-Length': buf.length
        },
        method: 'POST'
    }
    var req = https.request(options, function (res) {
        var cookies = res.headers['set-cookie'];
        var cookie = '';
        for (var i = cookies.length; i--;) {
            if (cookies[i].indexOf('user_session_') + 1) {
                return getPlayerStatus(cookies[i]);
            }
        }
    });
    req.write(buf);
    req.end();
}();

function getPlayerStatus(cookie) {
    var options = {
        host: 'watch.live.nicovideo.jp',
        path: '/api/getplayerstatus?v=lv197261141', // lv~のところは適宜変更
        headers: { cookie: cookie }
    };
    var req = http.request(options, function (res) {
        var strRes = '';
        res.on('data', function (data) {
            strRes += data.toString();
        });
        res.on('end', function () {
            parseString(strRes, function (err, result) {
                var ms = result.getplayerstatus.ms[0];
                getComment(ms.port[0], ms.addr[0], ms.thread[0]);
            });
        });
    }).end();
}

function getComment(port, addr, threadId) {
    var socket = new net.Socket();
    socket.connect(port, addr, function () {
        socket.write('<thread thread="' + threadId + '" version="20061206" res_from="-1"/>\0');
    });
    socket.on('data', function (data) {
        parseString(data.toString(), function (err, result) {
            if (result.chat) {
                console.log(result.chat._); //コメ出力
            }
        });
    });
}