A dead simple real time webchat with authorization using websockets
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/*
gochat - A dead simple real time webchat.
Copyright (C) 2022 Kasyanov Nikolay Alexeyevich (Unbewohnte)
This file is a part of gochat
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
function sha256(string) {
const encoded_string = new TextEncoder().encode(string);
return crypto.subtle.digest('SHA-256', encoded_string).then((hash_sum) => {
const hashArray = Array.from(new Uint8Array(hash_sum));
const hashHex = hashArray
.map((bytes) => bytes.toString(16).padStart(2, '0'))
.join('');
return hashHex;
});
}
function to_hex_string(byteArr) {
return Array.from(byteArr, function(byte) {
return ('0' + (byte & 0xFF).toString(16).slice(-2));
}).join('')
}
function is_image(filename) {
image_exts = ["jpe", "jpeg", "jpg", "png", "ppm", "gif"]
let is_img = false;
image_exts.find(ext => {
if (filename.includes(ext)) {
is_img = true;
return true;
}
});
return is_img;
}