https://www.nes.ru/assets/js/jquery.base64.js

1
2/**
3 * jQuery BASE64 functions
4 *
5 * 	<code>
6 * 		Encodes the given data with base64.
7 * 		String jQuery.base64Encode ( String str )
8 *		<br />
9 * 		Decodes a base64 encoded data.
10 * 		String jQuery.base64Decode ( String str )
11 * 	</code>
12 *
13 * Encodes and Decodes the given data in base64.
14 * This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.
15 * Base64-encoded data takes about 33% more space than the original data.
16 * 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.
17 * 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).
18 * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
19 *
20 * Example
21 * 	Code
22 * 		<code>
23 * 			jQuery.base64Encode("I'm Persian.");
24 * 		</code>
25 * 	Result
26 * 		<code>
27 * 			"SSdtIFBlcnNpYW4u"
28 * 		</code>
29 * 	Code
30 * 		<code>
31 * 			jQuery.base64Decode("SSdtIFBlcnNpYW4u");
32 * 		</code>
33 * 	Result
34 * 		<code>
35 * 			"I'm Persian."
36 * 		</code>
37 *
38 * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
39 * @link http://www.semnanweb.com/jquery-plugin/base64.html
40 * @see http://www.webtoolkit.info/
41 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
42 * @param {jQuery} {base64Encode:function(input))
43 * @param {jQuery} {base64Decode:function(input))
44 * @return string
45 */
46
47(function(jQuery) {
48
49    var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
50
51    var uTF8Encode = function(string) {
52        string = string.replace(/\x0d\x0a/g, "\x0a");
53        var output = "";
54        for (var n = 0; n < string.length; n++) {
55            var c = string.charCodeAt(n);
56            if (c < 128) {
57                output += String.fromCharCode(c);
58            } else if ((c > 127) && (c < 2048)) {
59                output += String.fromCharCode((c >> 6) | 192);
60                output += String.fromCharCode((c & 63) | 128);
61            } else {
62                output += String.fromCharCode((c >> 12) | 224);
63                output += String.fromCharCode(((c >> 6) & 63) | 128);
64                output += String.fromCharCode((c & 63) | 128);
65            }
66        }
67        return output;
68    };
69
70    var uTF8Decode = function(input) {
71        var string = "";
72        var i = 0;
73        var c = c1 = c2 = 0;
74        while (i < input.length) {
75            c = input.charCodeAt(i);
76            if (c < 128) {
77                string += String.fromCharCode(c);
78                i++;
79            } else if ((c > 191) && (c < 224)) {
80                c2 = input.charCodeAt(i + 1);
81                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
82                i += 2;
83            } else {
84                c2 = input.charCodeAt(i + 1);
85                c3 = input.charCodeAt(i + 2);
86                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
87                i += 3;
88            }
89        }
90        return string;
91    }
92
93    jQuery.extend({
94        base64Encode: function(input) {
95            var output = "";
96            var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
97            var i = 0;
98            input = uTF8Encode(input);
99            while (i < input.length) {
100                chr1 = input.charCodeAt(i++);
101                chr2 = input.charCodeAt(i++);
102                chr3 = input.charCodeAt(i++);
103                enc1 = chr1 >> 2;
104                enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
105                enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
106                enc4 = chr3 & 63;
107                if (isNaN(chr2)) {
108                    enc3 = enc4 = 64;
109                } else if (isNaN(chr3)) {
110                    enc4 = 64;
111                }
112                output = output + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);
113            }
114            return output;
115        },
116        base64Decode: function(input) {
117            var output = "";
118            var chr1, chr2, chr3;
119            var enc1, enc2, enc3, enc4;
120            var i = 0;
121            input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
122            while (i < input.length) {
123                enc1 = keyString.indexOf(input.charAt(i++));
124                enc2 = keyString.indexOf(input.charAt(i++));
125                enc3 = keyString.indexOf(input.charAt(i++));
126                enc4 = keyString.indexOf(input.charAt(i++));
127                chr1 = (enc1 << 2) | (enc2 >> 4);
128                chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
129                chr3 = ((enc3 & 3) << 6) | enc4;
130                output = output + String.fromCharCode(chr1);
131                if (enc3 != 64) {
132                    output = output + String.fromCharCode(chr2);
133                }
134                if (enc4 != 64) {
135                    output = output + String.fromCharCode(chr3);
136                }
137            }
138            output = uTF8Decode(output);
139            return output;
140        }
141    });
142})(jQuery);
143