magmaus3/infohash2base64
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Reduce the amount of functions on the backend

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Instead of using separate functions for each step (hex -> bytearray -> base64
and the opposite),
this commit merges the required functions into their uses.
This commit is contained in:
magmaus3 2023-07-24 18:53:22 +02:00
parent 206b295268
commit 97215d4265
Signed by: magmaus3
GPG key ID: 966755D3F4A9B251
1 changed files with 19 additions and 35 deletions
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54
index.html
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@ -7,58 +7,42 @@
<script>
/*
* TODO:
* - [ ] rewrite functions to not use copied functions
* - [x] rewrite functions to not use copied functions
* - [x] add UI
* - [x] add style
* - [ ] make everything not look like made at 0:41 on a phone
* - [x] make everything not look like made at 0:41 on a phone
*/
function hexToBytes(hexdata) {
// https://stackoverflow.com/a/39396866
var arr = hexdata.replace(/[^0-9a-fA-F]/g, '')
function infohashToBase64(infohash) {
// Converts an hex infohash into base64.
// Convert hex into an byte array
let byteArray = infohash.replace(/[^0-9a-fA-F]/g, '')
.match(/[0-9a-fA-F]{2}/g);
for(var i = 0; i<arr.length; i++) {
arr[i] = parseInt(arr[i], 16);
for(var i = 0; i<byteArray.length; i++) {
byteArray[i] = parseInt(byteArray[i], 16);
}
return arr;
}
function bytesToBase64(byteArray) {
// https://stackoverflow.com/a/11562550
// Convert byteArray into base64
return btoa(
String.fromCharCode.apply(
null, new Uint8Array(byteArray)
)
);
}
function base64ToArray(base64) {
// https://stackoverflow.com/a/21797381
var binaryString = atob(base64);
var bytes = new Uint8Array(binaryString.length);
for (var i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return bytes;
}
function base64ToInfohash(b64) {
// Converts a base64 value into a infohash (in a hex form)
function bytesToHex(byteArray) {
// https://stackoverflow.com/a/34310051
// Convert base64 into an byteArray
let binaryString = atob(b64);
let byteArray = new Uint8Array(binaryString.length);
for (var i = 0; i < binaryString.length; i++) {
byteArray[i] = binaryString.charCodeAt(i);
}
// Convert byteArray into hex values
return Array.from(byteArray, function(byte) {
return ('0' + (byte & 0xFF).toString(16)).slice(-2);
}).join('');
}
function infohashToBase64(infohash) {
return bytesToBase64(
hexToBytes(infohash)
);
}
function base64ToInfohash(b64) {
return bytesToHex(
base64ToArray(b64)
);
}
// Everything for the UI itself