Steam CD Key Batch query

index.js

const assert = require('assert');
const async = require('async');
const fs = require('fs');
let request = require('request');
const FileCookieStore = require('tough-cookie-filestore');

if (!fs.existsSync('cookies.json')) { fs.writeFileSync('cookies.json', '{}');}
let j = request.jar(new FileCookieStore('cookies.json'));
request = request.defaults({ jar : j });

// Fill cookie string here by grabbing it from a request in Chrome
// Should look like 'sessionid=c7...; steamLogin=2...; ...'
let cookies_from_browser = 'fill=me; in=please'; // Make sure not to check this in
let cookie_url = 'https://partner.steamgames.com';
cookies_from_browser.split('; ').forEach(function (cookie) {
  j.setCookie(cookie, cookie_url);
});

function queryKeys(next) {
  let keys = fs.readFileSync('keys.csv', 'utf8').split('\n').map(function (s) {
    return s.trim();
  });
  let out = [];
  async.eachSeries(keys, function (key, next) {
    if (!key) {
      console.log('');
      out.push('');
      return next();
    }
    let url = `https://partner.steamgames.com/querycdkey/cdkey?cdkey=${key}&method=Query`;
    request(url, function (err, resp, body) {
      if (!body) {
        console.log(resp, err);
      }
      let result = body.split('<h2>Activation Details</h2>')[1];
      if (!result && !err) {
        fs.writeFileSync('out.html', body);
        console.log('Error quering CD Key, check out.html to see the response returned from Steamworks,');
        console.log('  if it is a login page, your cookies_from_browser string is probably invalid');
        process.exit(-1);
      } 
      assert(result);
      result = result.split('</table>')[0];
      result = result.match(/<td>.*<\/td>/g);
      result = result.map(function (line) {
        return line.replace(/<[^>]*>/g, '');
      });
      let line = [key, (result[0] === 'Activated') ? '"' + result[1] + '"' : result[0]].join('\t');
      console.log(line);
      out.push(line);
      next();
    });
  }, function (err) {
    fs.writeFileSync('out.tsv', out.join('\n'));
    next(err);
  });
}

queryKeys(function (err) {
  if (err) {
    throw err;
  } else {
    console.log('Done.');
  }
});

package.json

{
  "dependencies": {
    "async": "^2.4.1",
    "request": "^2.81.0"
  }
}