var fs = require('fs'), https = require('https');

var dom = ['google.com', 'youtube.com', 'facebook.com', 'whoisxmlapi.com'];
var srv = 'www.whoisxmlapi.com', url = '/BulkWhoisLookup/bulkServices/';
var username = 'Your bulk whois api username';
var pass = 'Your bulk whois api password';
var file = 'bulk.csv';

function api(path, data, callback)
{
    var baseData = {
        password: pass,
        username: username,
        outputFormat: 'json'
    };

    var body = '';
    var opts = {
        host: srv,
        path: url + path,
        method:'POST',
        headers: {'Content-Type': 'application/json'}
    };

    https.request(opts, function(response) {
        response.on('data', function(chunk) {
            body += chunk;
        });
        response.on('end', function() {
            callback(body);
        });
    }).end(JSON.stringify(Object.assign({}, baseData, data)));
}

// This will save whois record info for all domains as 'bulk.csv' in current
// directory.

api('bulkWhois', {domains:dom}, function(body) {
    var id = {
        requestId: JSON.parse(body).requestId,
        startIndex: dom.length + 1
    };
    var timer = setInterval(function() {
        api('getRecords', Object.assign({},id,{maxRecords:0}),function(body) {
            if (JSON.parse(body).recordsLeft) {
                return;
            }
            clearInterval(timer);
            if (typeof JSON.parse(body).recordsLeft === 'undefined') {
                return;
            }
            api('download', id, function(csv) {
                fs.writeFile(file,csv);
            });
        });
    }, 3000);
});