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: url,
        headers: {
          'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36',
        },
      }, function (err, resp, body) {
        if (err) {
          throw err;
        }
        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"
  }
}

There is easier way that don't need you to install anything, and it's derived of this gist here. My revision only needs you to edit the JS code and place in into DevTools console directly. No login cookies and things like that. https://gist.github.com/petersvp/270f7d5d7d548448f4897586a0d389c0