Decode Hex, Base64
// ==UserScript==
// @name Decode Hex strings on Voz
// @namespace Decode Hex strings on Voz
// @version 4.1
// @icon https://www.google.com/s2/favicons?sz=64&domain=voz.vn
// @author kylyte
// @description Decode Hex, Base64
// @match https://voz.vn/t/*
// @run-at document-idle
// @license GPL-3.0
// ==/UserScript==
(function() {
'use strict';
function decodeHex(hexString) {
hexString = hexString.replace(/\s+/g, '');
if (!/^[0-9A-Fa-f]{2,}$/.test(hexString)) return hexString;
let hexStr = '';
try {
for (let i = 0; i < hexString.length; i += 2) {
hexStr += String.fromCharCode(parseInt(hexString.substr(i, 2), 16));
}
if (/^[\x20-\x7E]*$/.test(hexStr) && hexStr.length > 3) {
return hexStr;
} else {
return hexString;
}
} catch {
return hexString;
}
}
function decodeBase64(base64String) {
if (!/^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/.test(base64String)) return base64String;
try {
let binaryString = atob(base64String);
if (/^[\x20-\x7E]*$/.test(binaryString) && binaryString.length > 3) {
return binaryString;
} else {
return base64String;
}
} catch {
return base64String;
}
}
function decodeContent(elements, regex, decodeFunc) {
elements.forEach(element => {
const excludedSelectors = [
'.fr-box.bbWrapper.fr-ltr.fr-basic.fr-top',
'.tooltip.tooltip--basic',
'.bbImage',
'.bbMediaJustifier',
'.link'
];
if (excludedSelectors.some(selector => element.closest(selector))) return;
let walker = document.createTreeWalker(element, NodeFilter.SHOW_TEXT, null, false);
let textNode;
while (textNode = walker.nextNode()) {
let content = textNode.nodeValue;
let matches = content.match(regex);
if (matches) {
matches.forEach(match => {
content = content.replace(new RegExp(escapeRegExp(match), 'g'), decodeFunc(match));
});
textNode.nodeValue = content;
}
}
});
}
function escapeRegExp(string) {
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
function main() {
let elements = document.querySelectorAll('.bbWrapper');
decodeContent(elements, /\b([0-9A-Fa-f]{2}\s*){4,}\b/g, decodeHex);
decodeContent(elements, /(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=|[A-Za-z0-9+\/]{4})/g, decodeBase64);
}
main();
})();