Steam CD Key Batch query

index.js

/* jshint esversion: 6*/
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 void next();
    }
    let retries = 0;
    function doAttempt() {
      let url = `https://partner.steamgames.com/querycdkey/cdkey?cdkey=${key}&method=Query`;
      request(url, function (err, resp, body) {
        let result = body.split('<h2>Activation Details</h2>')[1];
        if (!result && !err) {
          if (retries < 5) {
            ++retries;
            console.log(`Error, retrying ${retries}...`);
            return doAttempt();
          }
          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>/gu);
        result = result.map(function (line) {
          return line.replace(/<[^>]*>/gu, '');
        });
        let line = [key, (result[0] === 'Activated') ? '"' + result[1] + '"' : result[0]].join('\t');
        console.log(line);
        out.push(line);
        return next();
      });
    }
    doAttempt();
  }, 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",
    "tough-cookie-filestore": "0.0.1"
  }
}