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tesseractJSautofill

auto fill captcha text by tesseract.js

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://updategreasyfork.deno.dev/scripts/489988/1347251/tesseractJSautofill.js 

// ==UserScript==
// @name          tesseractJSautofill
// @namespace     https://gf.zukizuki.org
// @version       0.0.2
// @description   auto fill captcha text by tesseract.js
// @match         *://*/*
// @grant         none
// ==/UserScript==

// @require     https://unpkg.com/tesseract.js/dist/tesseract.min.js
const init_worker = async (language) => {
  const lang = language;
  const server = 'https://unpkg.com';
  const langPath = `${server}/@tesseract.js-data/${lang}/4.0.0_best_int`;
  const worker = await Tesseract.createWorker(lang, 1, {
    corePath: `${server}/tesseract.js-core`,
    workerPath: `${server}/tesseract.js/dist/worker.min.js`,
    langPath: langPath,
    logger: () => {
      console.debug('init worker', `${server}/tesseract.js/dist/worker.min.js`);
    },
  });

  return worker;
};

const img_src_to_base64 = (img) => {
  // https://stackoverflow.com/a/22172860
  let canvas = document.createElement('canvas');
  // https://developer.mozilla.org/docs/Web/API/HTMLImageElement/naturalWidth
  canvas.width = img.naturalWidth;
  // https://developer.mozilla.org/docs/Web/API/HTMLImageElement/naturalHeight
  canvas.height = img.naturalHeight;
  let ctx = canvas.getContext('2d');
  ctx.drawImage(img, 0, 0);
  return ctx.canvas.toDataURL('image/png');
};

const get_captcha_text = async (imgTag, worker) => {
  let node = document.querySelector(imgTag);
  const ret = await worker.recognize(img_src_to_base64(node));
  // console.debug(ret);
  const ret_text = ret.data.text;
  // console.debug(ret_text);
  return ret_text;
};

const auto_fill_captcha_text = async (
  imgTag,
  valueTag,
  loginTag = '',
  delayTime = 3000,
  failFunction = 'reload',
  language = 'eng',
  textLength = 4,
  textType = '\\d'
) => {
  const worker = await init_worker(language);

  let captcha_text = await get_captcha_text(imgTag, worker);
  let optimised_text = captcha_text.trim().split(' ').join('');

  const regex = RegExp(`${textType}{${textLength}}`);

  console.debug(regex, optimised_text, regex.test(optimised_text));

  if (optimised_text.length === textLength && regex.test(optimised_text)) {
    document.querySelector(valueTag).value = optimised_text;
    console.debug('reloadCounter', sessionStorage.getItem('reloadCounter'));
    sessionStorage.setItem('reloadCounter', '0');
    if (loginTag.length > 0) {
      document.querySelector(loginTag).click();
    }
  } else {
    document.querySelector(valueTag).value = '';
    sessionStorage.setItem(
      'reloadCounter',
      `${Number(sessionStorage.getItem('reloadCounter')) + 1}`
    );
    console.debug('reloadCounter', sessionStorage.getItem('reloadCounter'));

    if (failFunction === 'null') return;
    setTimeout(() => {
      if (failFunction === 'reload') {
        location.reload();
      }
    }, delayTime);
  }
};