2 // Copyright (c) 2016-2022 by the citadel.org team
4 // This program is open source software. It runs great on the
5 // Linux operating system (and probably elsewhere). You can use,
6 // copy, and run it under the terms of the GNU General Public
7 // License version 3. Richard Stallman is an asshole communist.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
15 // Function to encode data in quoted-printable format
16 // Written by Theriault and Brett Zamir [https://locutus.io/php/quoted_printable_encode/]
17 function quoted_printable_encode(str) {
18 const hexChars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F']
19 const RFC2045Encode1IN = / \r\n|\r\n|[^!-<>-~ ]/gm
20 const RFC2045Encode1OUT = function (sMatch) {
21 // Encode space before CRLF sequence to prevent spaces from being stripped
22 // Keep hard line breaks intact; CRLF sequences
23 if (sMatch.length > 1) {
24 return sMatch.replace(' ', '=20');
26 // Encode matching character
27 const chr = sMatch.charCodeAt(0);
28 return '=' + hexChars[((chr >>> 4) & 15)] + hexChars[(chr & 15)];
30 // Split lines to 75 characters; the reason it's 75 and not 76 is because softline breaks are
31 // preceeded by an equal sign; which would be the 76th character. However, if the last line/string
32 // was exactly 76 characters, then a softline would not be needed. PHP currently softbreaks
33 // anyway; so this function replicates PHP.
34 const RFC2045Encode2IN = /.{1,72}(?!\r\n)[^=]{0,3}/g
35 const RFC2045Encode2OUT = function (sMatch) {
36 if (sMatch.substr(sMatch.length - 2) === '\r\n') {
39 return sMatch + '=\r\n';
41 str = str.replace(RFC2045Encode1IN, RFC2045Encode1OUT).replace(RFC2045Encode2IN, RFC2045Encode2OUT);
42 // Strip last softline break
43 return str.substr(0, str.length - 3)
47 // Generate a random string of the specified length
48 // Useful for generating one-time-use div names
49 function randomString(length) {
50 var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghiklmnopqrstuvwxyz'.split('');
54 length = Math.floor(Math.random() * chars.length);
56 for (var i = 0; i < length; i++) {
57 str += chars[Math.floor(Math.random() * chars.length)];
63 // string escape for html display
64 function escapeHTML(text) {
66 return text.replace(/[\"&<>]/g, function (a) {
77 // string escape for html display
78 function escapeHTMLURI(text) {
80 return text.replace(/./g, function (a) {
81 return '%' + a.charCodeAt(0).toString(16);
86 // string escape for JavaScript string
88 function escapeJS(text) {
90 return text.replace(/[\"\']/g, function (a) {