NoReferrer

no-referrer.userscript.js

// ==UserScript==
// @name         NoReferrer
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        http*://*/*
// @grant        GM_xmlhttpRequest
// @connect      coupa.ng
// @connect      a.aliexpress.com
// @connect      s.click.aliexpress.com
// @connect      star.aliexpress.com
// @connect      *.aliexpress.com
// @require      https://greasyfork.org/scripts/421384-gm-fetch/code/GM_fetch.js?version=898562
// @icon         https://www.google.com/s2/favicons?domain=linkprice.com
// ==/UserScript==

(function() {
  'use strict';

  const style = document.createElement('style');
  style.type = 'text/css';
  const modifiedClassName = `link-${String(Math.random()).replace(/[^\d]/g, '')}`;
  const styles = `.${modifiedClassName} {
    text-decoration: underline !important;
    text-decoration-thickness: 0.4em !important;
    text-decoration-skip-ink: none !important;
    text-decoration-color: #ffe0005e !important;
    transition: text-decoration-color 0.2s !important;
  }
  .${modifiedClassName}:hover {
    text-decoration-color: #ffe000ab !important;
  }
  `;
  if (style.styleSheet) {
    style.styleSheet.cssText = styles;
  } else {
    style.appendChild(document.createTextNode(styles));
  }
  (document.querySelector('head') ?? document.body).appendChild(style);

  const targetDomains = [
    'click.linkprice.com',
    's.ppomppu.co.kr',
    'link.coupang.com',
    'www.amazon.com',
    'click.aliexpress.com',
  ];
  const specialDomains = [
    'coupa.ng',
    'a.aliexpress.com',
    's.click.aliexpress.com',
  ];
  const handleSpecialDomain = async (domain, link) => {
    link.rel = 'noreferrer noopener';
    const response = await GM_fetch(link.href);

    switch (domain) {
      case 'coupa.ng': {
        const finalUrl = new URL(response.finalUrl);
        for (const key of [...finalUrl.searchParams.keys()]) {
          if (!['itemId', 'vendorItemId'].includes(key)) {
            finalUrl.searchParams.delete(key);
          }
        }
        link.href = finalUrl.toString();
        link.classList.add(modifiedClassName);
      } break;

      case 'a.aliexpress.com':
      case 's.click.aliexpress.com': {
        const intermediateUrl = new URL(response.finalUrl);
        const redirectUrl = new URL(intermediateUrl.searchParams.get('redirectUrl'));
        redirectUrl.search = '';
        link.href = redirectUrl.toString();
        link.classList.add(modifiedClassName);
      } break;
    }
  };

  const links = document.getElementsByTagName('a');
  console.debug('[NoReferrer]', 'links', links);
  for (const link of links) {
    const specialCase = specialDomains.find((targetDomain) => link.href.includes(targetDomain));
    if (specialCase) {
      handleSpecialDomain(specialCase, link).catch(console.error);
      continue;
    } else if (targetDomains.findIndex((targetDomain) => link.href.includes(targetDomain)) === -1) {
      continue;
    }

    const hasDifferentLink = link.textContent.match(/^(\s+)?https?\:\/\//) && link.textContent !== link.href;
    console.debug('[NoReferrer]', 'hasDifferentLink?', hasDifferentLink, { href: link.href, text: link.textContent.trim() });
    if (hasDifferentLink) {
      let href = link.textContent.trim();
      try {
        const url = new URL(href);
        if (url.searchParams.has('ref')) {
          url.searchParams.delete('ref');
        }
        href = url.toString();
      } catch {}
      link.href = href;
      link.classList.add(modifiedClassName);
    }

    link.rel = 'noreferrer noopener';
  }
})();