1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/**
* 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>
* $.base64Decode("SSdtIFBlcnNpYW4u");
* </code>
* Result
* <code>
* "I'm Persian."
* </code>
*
* @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
* @link http://www.semnanweb.com/jquery-plugin/base64.html
* @see http://www.webtoolkit.info/
* @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
* @param {jQuery} {base64Encode:function(input))
* @param {jQuery} {base64Decode:function(input))
* @return string
*/
(function($){
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 = c2 = c3 = c4 = 0;
while ( i < input.length ) {
c = input.charCodeAt(i);
if (c < 128) { // 1 byte encoding - ASCII only
string += String.fromCharCode(c);
i++;
} else if ((c >= 192) && (c < 224)) { // 2 byte encoding - max U+07FF
c2 = input.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
} else if ((c >= 224) && (c < 240)) { // 3 byte encoding - max U+FFFF
c2 = input.charCodeAt(i+1);
c3 = input.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
} else if ((c >= 240) && (c < 248)){ // 4 byte encoding - max U+10FFFF. Covers all Unicode CodePoints
c2 = input.charCodeAt(i+1);
c3 = input.charCodeAt(i+2);
c4 = input.charCodeAt(i+3);
var codePoint = (((c & 7) << 18) | ((c2 & 63) << 12) | ((c3 & 63) << 6) | (c4 & 63));
if (codePoint > 0x10FFFF) {
throw new SyntaxError("invalid UTF-8 code unit sequence");
}
var highSurrogate = (((codePoint - 0x10000) & 0xFFC00) >>> 10) + 0xD800; // Minus 0x10000, then top 10 bits added to 0xD800
var lowSurrogate = ((codePoint - 0x10000) & 0x3FF) + 0xDC00; // Minus 0x10000, then low 10 bits added to 0xDC00
string += String.fromCharCode(highSurrogate);
string += String.fromCharCode(lowSurrogate);
i += 4;
}
}
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);
|
