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Replace Uint8Array.fromBase64 with my own decoder 

My iPhone (iOS 16) does not have that function implemeneted.
This commit is contained in:
Oskari Alaranta 2025-10-27 15:50:15 +02:00
parent 359880cb9f
commit 6185be533d
1 changed files with 45 additions and 2 deletions
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47
src/main.js
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@ -1,9 +1,52 @@
function b64decode(data) {
let length = (data.length >> 2) * 3;
if (data.length % 4)
length += (data.length % 4) - 1;
const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';
const table = []
for (let i = 0; i < alphabet.length; i++)
table[alphabet.charCodeAt(i)] = i;
const result = new Uint8Array(length);
for (let i = 0; i < data.length / 4; i++) {
const value =
(table[data.charCodeAt(4 * i + 0)] << 18) |
(table[data.charCodeAt(4 * i + 1)] << 12) |
(table[data.charCodeAt(4 * i + 2)] << 6) |
(table[data.charCodeAt(4 * i + 3)] << 0);
result[3 * i + 0] = value >> 16;
result[3 * i + 1] = value >> 8;
result[3 * i + 2] = value >> 0;
}
if (data.length % 4 == 2) {
const value =
(table[data.charCodeAt(data.length - 2)] << 6) |
(table[data.charCodeAt(data.length - 1)] << 0);
result[result.length - 1] = value >> 4;
}
if (data.length % 4 == 3) {
const value =
(table[data.charCodeAt(data.length - 3)] << 12) |
(table[data.charCodeAt(data.length - 2)] << 6) |
(table[data.charCodeAt(data.length - 1)] << 0);
result[result.length - 2] = value >> 10;
result[result.length - 1] = value >> 2;
}
return result;
}
window.addEventListener('load', function() {
const base64 = window.location.hash.substring(1)
const zlib = Uint8Array.fromBase64(base64, { alphabet: 'base64url' });
const zlib = b64decode(base64);
const uncompressed = pako.inflate(new Uint8Array(zlib));
const uncompressed = pako.inflate(zlib);
let decoded = new TextDecoder().decode(uncompressed);