2023-07-24 13:29:52 +00:00
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title></title>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<script>
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2023-07-24 16:53:22 +00:00
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function infohashToBase64(infohash) {
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// Converts an hex infohash into base64.
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// Convert hex into an byte array
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let byteArray = infohash.replace(/[^0-9a-fA-F]/g, '')
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.match(/[0-9a-fA-F]{2}/g);
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for(var i = 0; i<byteArray.length; i++) {
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byteArray[i] = parseInt(byteArray[i], 16);
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}
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// Convert byteArray into base64
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return btoa(
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String.fromCharCode.apply(
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null, new Uint8Array(byteArray)
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)
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);
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}
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2023-07-24 16:53:22 +00:00
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function base64ToInfohash(b64) {
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// Converts a base64 value into a infohash (in a hex form)
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// Convert base64 into an byteArray
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let binaryString = atob(b64);
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let byteArray = new Uint8Array(binaryString.length);
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for (var i = 0; i < binaryString.length; i++) {
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byteArray[i] = binaryString.charCodeAt(i);
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}
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// Convert byteArray into hex values
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return Array.from(byteArray, function(byte) {
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return ('0' + (byte & 0xFF).toString(16)).slice(-2);
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}).join('');
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}
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2023-07-24 14:46:57 +00:00
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// Everything for the UI itself
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// Holds the state of tabs.
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// Intended values are "encode", "decode" and "about"
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let tabOpen = "encode"
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function switchTab(name) {
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// Switches the tab
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// only "encode","decode" and "about" values are supported
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let url = new URL(window.location)
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url.searchParams.set("tab", name)
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window.history.replaceState(null, "", url.href)
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if (name === "encode") {
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document.getElementById("encode").style.display = "block"
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document.getElementById("decode").style.display = "none"
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document.getElementById("about").style.display = "none"
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} else if (name === "decode") {
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document.getElementById("encode").style.display = "none"
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document.getElementById("decode").style.display = "block"
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document.getElementById("about").style.display = "none"
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} else if (name === "about") {
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document.getElementById("encode").style.display = "none"
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document.getElementById("decode").style.display = "none"
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document.getElementById("about").style.display = "block"
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}
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}
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addEventListener("DOMContentLoaded", (event) => {
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// Get the current query params
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const urlParams = new URLSearchParams(window.location.search);
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if (
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urlParams.has("tab") &&
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["encode", "decode", "about"].includes(urlParams.get("tab"))
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) {
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// Check if tab parameter is set up and is correct
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// If not, an default value will be used
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tabOpen = urlParams.get("tab")
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}
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switchTab(tabOpen)
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document.getElementsByClassName("tabBar")[0].style.display = "flex"
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// Show the result of the action performed before reloading
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if (urlParams.get("tab") === "encode" && urlParams.has("infohashv1")) {
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document.getElementById("encodeResult").innerText = infohashToBase64(urlParams.get("infohashv1"))
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} else if (urlParams.get("tab") === "decode" && urlParams.has("base64value")) {
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document.getElementById("decodeResult").innerText = base64ToInfohash(urlParams.get("base64value"))
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}
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});
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</script>
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<style>
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body {
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width: 100vw; height: 100vh;
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margin: 0; padding: 0;
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display: flex; flex-direction: column;
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justify-content: center;
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align-items: center;
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background-color: #10101a;
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color: white;
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font-family: monospace;
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}
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main {
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2023-07-24 15:21:28 +00:00
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background-color: #202025;
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padding: 1em;
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border: 1px solid white;
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border-radius: 1em;
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box-shadow: 0px 5px 15px black, 0px 1px 15px black inset;
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2023-07-24 14:46:57 +00:00
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}
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input {
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color: white;
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background-color: transparent;
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border: 1px solid white;
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}
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label {
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margin-right: 0.5rem;
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}
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.tab {
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border: 1px solid white;
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padding: 1em;
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border-radius: 0em 0em 1em 1em;
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box-shadow: 0px 5px 15px black, 0px 1px 15px black inset;
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}
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.result:empty { display: none;}
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.result {
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background-color: rgba(32, 32, 42, 0.5);
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margin-top: 1em;
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padding: 0.5rem;
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border: 1px solid gray;
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border-radius: 1em;
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}
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.tab, .tabBar {
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display: none; /* Default value to keep tabs hidden when JS is not available */
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}
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.button {
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flex: 1;
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text-align: center;
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padding: 0.5em;
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border: 1px solid white;
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border-bottom: none;
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transition: box-shadow 200ms ease;
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}
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.leftButton {
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border-radius: 1em 0em 0em 0em;
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}
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.rightButton {
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border-radius: 0em 1em 0em 0em;
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}
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.button:hover {
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2023-07-24 15:21:28 +00:00
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box-shadow: 0px 5px 25px black;
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}
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.button:active {
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background-color: rgba(255,255,255, 0.2);
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}
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a { color: cyan; text-decoration: none;}
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2023-07-25 12:48:24 +00:00
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#about, .noscript {
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display: block;
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max-width: 40rem;
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}
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</style>
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</head>
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<body>
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2023-07-24 14:46:57 +00:00
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<main>
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<h1>infohash ↔ base64</h1>
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<noscript>
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2023-07-25 12:48:24 +00:00
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<div class="noscript">
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<p>This tool requires JavaScript to function.</p>
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<p>You can use DevTools in your browser to look at the code (it's intended to be easily readable).</p>
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</div>
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</noscript>
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<div class="tabBar">
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<div onclick="switchTab('encode')" class="button leftButton">Encode</div>
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<div onclick="switchTab('decode')" class="button">Decode</div>
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<div onclick="switchTab('about')" class="button rightButton">About</div>
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</div>
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<div class="tab" id="encode">
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<form>
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<h2>Encode</h2>
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<input type="hidden" name="tab" value="encode" />
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<label for="infohashv1">infohash v1</label><input type="text" id="infohashv1" name="infohashv1" pattern="[0-9a-f]*" />
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<input type="submit" method="get" value="convert"/>
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</form>
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<div class="result" id="encodeResult"></div>
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</div>
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<div class="tab" id="decode">
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<form>
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<h2>Decode</h2>
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<input type="hidden" name="tab" value="decode" />
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<label for="base64value">base64 value</label><input type="text" id="base64value" name="base64value" />
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<input type="submit" method="get" value="convert"/>
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</form>
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<div class="result" id="decodeResult"></div>
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</div>
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<div class="tab" id="about">
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<h2>About</h2>
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<p>
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This tool was made to work with <a href="https://lemmy.dbzer0.com/post/1009713">an suggestion posted by @toxictenement@lemmy.dbzer0.com</a>
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by <a href="https://magmaus3.eu.org">magmaus3</a>.
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</p>
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<p>
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You can check the source code by downloading the page (everything is stored in a single html file),
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by going to your browser's devtools or on <a href="https://codeberg.org/magmaus3/infohash2base64">Codeberg</a>.
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</p>
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2023-07-24 14:58:36 +00:00
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</div>
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2023-07-24 14:46:57 +00:00
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</main>
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2023-07-24 13:29:52 +00:00
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</body>
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</html>
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