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jQuery BASE64 functions (yet another)
/**
* jQuery BASE64 functions
*
* <code>
* Encodes the given data with base64.
* String $.base64Encode ( String str )
* <br />
* Decodes a base64 encoded data.
* String $.base64Decode ( String str )
* </code>
*
* Encodes and Decodes the given data in base64.
* This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.
* Base64-encoded data takes about 33% more space than the original data.
* This javascript code is used to encode / decode data using base64 (this encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean). Script is fully compatible with UTF-8 encoding. You can use base64 encoded data as simple encryption mechanism.
* If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag).
* This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
*
* Example
* Code
* <code>
* $.base64Encode("I'm Persian.");
* </code>
* Result
* <code>
* "SSdtIFBlcnNpYW4u"
* </code>
* Code
* <code>
* $.base64Decode("SSdtIFBlcnNpYW4u");
* </code>
* Result
* <code>
* "I'm Persian."
* </code>
*
* @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
* @link http://www.semnanweb.com/jquery-plugin/base64.html (no longer available?)
* @link https://gist.github.com/gists/1602210
* @see http://www.webtoolkit.info/
* @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
* @param {jQuery} {base64Encode:function(input))
* @param {jQuery} {base64Decode:function(input))
* @return string
*/
(function($){
var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var uTF8Encode = function(string) {
string = string.replace(/\x0d\x0a/g, "\x0a");
var output = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
output += String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
output += String.fromCharCode((c >> 6) | 192);
output += String.fromCharCode((c & 63) | 128);
} else {
output += String.fromCharCode((c >> 12) | 224);
output += String.fromCharCode(((c >> 6) & 63) | 128);
output += String.fromCharCode((c & 63) | 128);
}
}
return output;
};
var uTF8Decode = function(input) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < input.length ) {
c = input.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
} else if ((c > 191) && (c < 224)) {
c2 = input.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
} else {
c2 = input.charCodeAt(i+1);
c3 = input.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
$.extend({
base64Encode: function(input) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = uTF8Encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);
}
return output;
},
base64Decode: function(input) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = keyString.indexOf(input.charAt(i++));
enc2 = keyString.indexOf(input.charAt(i++));
enc3 = keyString.indexOf(input.charAt(i++));
enc4 = keyString.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
output = uTF8Decode(output);
return output;
}
});
})(jQuery);
@TaoK
Owner

This is a simple dump of Muhammad Hussein Fattahizadeh's jquery base64 encoding/decoding plugin. There are several others out there, but this is the one I tried and worked for me, so I'm keeping it.

Its original home, listed above in the code, does not seem to exist anymore, so I've created this gist for version tracking etc.

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