☰

Decode Hex strings on Voz

Decode Hex, Base64

  1. // ==UserScript==
  2. // @name         Decode Hex strings on Voz
  3. // @namespace    Decode Hex strings on Voz
  4. // @version      4.1
  5. // @icon         https://www.google.com/s2/favicons?sz=64&domain=voz.vn
  6. // @author       kylyte
  7. // @description  Decode Hex, Base64
  8. // @match        https://voz.vn/t/*
  9. // @run-at       document-idle
  10. // @license      GPL-3.0
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     function decodeHex(hexString) {
  17.         hexString = hexString.replace(/\s+/g, '');
  18.         if (!/^[0-9A-Fa-f]{2,}$/.test(hexString)) return hexString;
  19.         let hexStr = '';
  20.         try {
  21.             for (let i = 0; i < hexString.length; i += 2) {
  22.                 hexStr += String.fromCharCode(parseInt(hexString.substr(i, 2), 16));
  23.             }
  24.             if (/^[\x20-\x7E]*$/.test(hexStr) && hexStr.length > 3) {
  25.                 return hexStr;
  26.             } else {
  27.                 return hexString;
  28.             }
  29.         } catch {
  30.             return hexString;
  31.         }
  32.     }
  33.  
  34.     function decodeBase64(base64String) {
  35.         if (!/^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/.test(base64String)) return base64String;
  36.         try {
  37.             let binaryString = atob(base64String);
  38.             if (/^[\x20-\x7E]*$/.test(binaryString) && binaryString.length > 3) {
  39.                 return binaryString;
  40.             } else {
  41.                 return base64String;
  42.             }
  43.         } catch {
  44.             return base64String;
  45.         }
  46.     }
  47.  
  48.     function decodeContent(elements, regex, decodeFunc) {
  49.         elements.forEach(element => {
  50.             const excludedSelectors = [
  51.                 '.fr-box.bbWrapper.fr-ltr.fr-basic.fr-top',
  52.                 '.tooltip.tooltip--basic',
  53.                 '.bbImage',
  54.                 '.bbMediaJustifier',
  55.                 '.link'
  56.             ];
  57.             if (excludedSelectors.some(selector => element.closest(selector))) return;
  58.             let walker = document.createTreeWalker(element, NodeFilter.SHOW_TEXT, null, false);
  59.             let textNode;
  60.             while (textNode = walker.nextNode()) {
  61.                 let content = textNode.nodeValue;
  62.                 let matches = content.match(regex);
  63.                 if (matches) {
  64.                     matches.forEach(match => {
  65.                         content = content.replace(new RegExp(escapeRegExp(match), 'g'), decodeFunc(match));
  66.                     });
  67.                     textNode.nodeValue = content;
  68.                 }
  69.             }
  70.         });
  71.     }
  72.  
  73.     function escapeRegExp(string) {
  74.         return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
  75.     }
  76.  
  77.     function main() {
  78.         let elements = document.querySelectorAll('.bbWrapper');
  79.         decodeContent(elements, /\b([0-9A-Fa-f]{2}\s*){4,}\b/g, decodeHex);
  80.         decodeContent(elements, /(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{4})/g, decodeBase64);
  81.     }
  82.  
  83.     main();
  84. })();