You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.5 KiB
49 lines
1.5 KiB
3 years ago
|
/*
|
||
|
|
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/>.
|
||
|
|
*/
|
||
|
|
|
||
|
3 years ago
|
|
||
|
3 years ago
|
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;
|
||
|
|
});
|
||
|
3 years ago
|
}
|
||
|
|
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|