From 284aac2883ec492f3ba501f827f73c2f654460a1 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Fri, 14 Aug 2015 05:08:54 -0400
Subject: [PATCH] Really make base64 encoding unicode-aware
---
program/js/common.js | 67 +++++++++++++++++++++++++++++----
1 files changed, 59 insertions(+), 8 deletions(-)
diff --git a/program/js/common.js b/program/js/common.js
index 2c699d0..7a0c303 100644
--- a/program/js/common.js
+++ b/program/js/common.js
@@ -683,11 +683,60 @@
};
-// This code was written by Tyler Akins and has been placed in the
-// public domain. It would be nice if you left this header intact.
// Base64 code from Tyler Akins -- http://rumkin.com
var Base64 = (function () {
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+ // private method for UTF-8 encoding
+ var utf8_encode = function(string) {
+ string = string.replace(/\r\n/g, "\n");
+ var utftext = '';
+
+ for (var n = 0; n < string.length; n++) {
+ var c = string.charCodeAt(n);
+
+ if (c < 128) {
+ utftext += String.fromCharCode(c);
+ }
+ else if(c > 127 && c < 2048) {
+ utftext += String.fromCharCode((c >> 6) | 192);
+ utftext += String.fromCharCode((c & 63) | 128);
+ }
+ else {
+ utftext += String.fromCharCode((c >> 12) | 224);
+ utftext += String.fromCharCode(((c >> 6) & 63) | 128);
+ utftext += String.fromCharCode((c & 63) | 128);
+ }
+ }
+
+ return utftext;
+ };
+
+ // private method for UTF-8 decoding
+ var utf8_decode = function (utftext) {
+ var i = 0, string = '', c = c2 = c3 = 0;
+
+ while (i < utftext.length) {
+ c = utftext.charCodeAt(i);
+ if (c < 128) {
+ string += String.fromCharCode(c);
+ i++;
+ }
+ else if (c > 191 && c < 224) {
+ c2 = utftext.charCodeAt(i + 1);
+ string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
+ i += 2;
+ }
+ else {
+ c2 = utftext.charCodeAt(i + 1);
+ c3 = utftext.charCodeAt(i + 2);
+ string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
+ i += 3;
+ }
+ }
+
+ return string;
+ };
var obj = {
/**
@@ -703,9 +752,11 @@
catch (e) {};
}
+ input = utf8_encode(input);
+
var chr1, chr2, chr3, enc1, enc2, enc3, enc4, i = 0, output = '', len = input.length;
- do {
+ while (i < len) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
@@ -723,7 +774,7 @@
output = output
+ keyStr.charAt(enc1) + keyStr.charAt(enc2)
+ keyStr.charAt(enc3) + keyStr.charAt(enc4);
- } while (i < len);
+ }
return output;
},
@@ -736,7 +787,7 @@
if (typeof(window.atob) === 'function') {
// it may fail on unicode characters, the fallback can handle them
try {
- return atob(input);
+ return utf8_decode(atob(input));
}
catch (e) {};
}
@@ -747,7 +798,7 @@
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
len = input.length;
- do {
+ while (i < len) {
enc1 = keyStr.indexOf(input.charAt(i++));
enc2 = keyStr.indexOf(input.charAt(i++));
enc3 = keyStr.indexOf(input.charAt(i++));
@@ -763,9 +814,9 @@
output = output + String.fromCharCode(chr2);
if (enc4 != 64)
output = output + String.fromCharCode(chr3);
- } while (i < len);
+ }
- return output;
+ return utf8_decode(output);
}
};
--
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