blob: a39a50a67cd84a9557d07cc60a1491b2378be55e (
plain) (
blame)
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
|
'use strict';
module.exports = function base64_decode(encodedData) {
// eslint-disable-line camelcase
// discuss at: http://locutus.io/php/base64_decode/
// original by: Tyler Akins (http://rumkin.com)
// improved by: Thunder.m
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: Kevin van Zonneveld (http://kvz.io)
// input by: Aman Gupta
// input by: Brett Zamir (http://brett-zamir.me)
// bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
// bugfixed by: Pellentesque Malesuada
// bugfixed by: Kevin van Zonneveld (http://kvz.io)
// improved by: Indigo744
// example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==')
// returns 1: 'Kevin van Zonneveld'
// example 2: base64_decode('YQ==')
// returns 2: 'a'
// example 3: base64_decode('4pyTIMOgIGxhIG1vZGU=')
// returns 3: '✓ à la mode'
// decodeUTF8string()
// Internal function to decode properly UTF8 string
// Adapted from Solution #1 at https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding
var decodeUTF8string = function decodeUTF8string(str) {
// Going backwards: from bytestream, to percent-encoding, to original string.
return decodeURIComponent(str.split('').map(function (c) {
return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
}).join(''));
};
if (typeof window !== 'undefined') {
if (typeof window.atob !== 'undefined') {
return decodeUTF8string(window.atob(encodedData));
}
} else {
return new Buffer(encodedData, 'base64').toString('utf-8');
}
var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
var o1;
var o2;
var o3;
var h1;
var h2;
var h3;
var h4;
var bits;
var i = 0;
var ac = 0;
var dec = '';
var tmpArr = [];
if (!encodedData) {
return encodedData;
}
encodedData += '';
do {
// unpack four hexets into three octets using index points in b64
h1 = b64.indexOf(encodedData.charAt(i++));
h2 = b64.indexOf(encodedData.charAt(i++));
h3 = b64.indexOf(encodedData.charAt(i++));
h4 = b64.indexOf(encodedData.charAt(i++));
bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
o1 = bits >> 16 & 0xff;
o2 = bits >> 8 & 0xff;
o3 = bits & 0xff;
if (h3 === 64) {
tmpArr[ac++] = String.fromCharCode(o1);
} else if (h4 === 64) {
tmpArr[ac++] = String.fromCharCode(o1, o2);
} else {
tmpArr[ac++] = String.fromCharCode(o1, o2, o3);
}
} while (i < encodedData.length);
dec = tmpArr.join('');
return decodeUTF8string(dec.replace(/\0+$/, ''));
};
//# sourceMappingURL=base64_decode.js.map
|
