4 examples of 'atob nodejs' in JavaScript

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6function atob(str) {
7 // normal window
8 if ('function' === typeof a2b) {
9 return a2b(str);
10 }
11 // browserify (web worker)
12 else if ('function' === typeof Buffer) {
13 return new Buffer(str, 'base64').toString('binary');
14 }
15 // ios web worker with base64js
16 else if ('object' === typeof w.base64js) {
17 // bufferToBinaryString
18 // https://github.com/coolaj86/unibabel-js/blob/master/index.js#L50
19 var buf = w.base64js.b64ToByteArray(str);
20
21 return Array.prototype.map.call(buf, function (ch) {
22 return String.fromCharCode(ch);
23 }).join('');
24 }
25 // ios web worker without base64js
26 else {
27 throw new Error("you're probably in an ios webworker. please include use beatgammit's base64-js");
28 }
29}
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61function atob(input) {
62 input = String(input);
63 var position = 0,
64 output = [],
65 buffer = 0, bits = 0, n;
66
67 input = input.replace(/\s/g, '');
68 if ((input.length % 4) === 0) { input = input.replace(/=+$/, ''); }
69 if ((input.length % 4) === 1) { throw Error("InvalidCharacterError"); }
70 if (/[^+/0-9A-Za-z]/.test(input)) { throw Error("InvalidCharacterError"); }
71
72 while (position < input.length) {
73 n = B64_ALPHABET.indexOf(input.charAt(position));
74 buffer = (buffer << 6) | n;
75 bits += 6;
76
77 if (bits === 24) {
78 output.push(String.fromCharCode((buffer >> 16) & 0xFF));
79 output.push(String.fromCharCode((buffer >> 8) & 0xFF));
80 output.push(String.fromCharCode(buffer & 0xFF));
81 bits = 0;
82 buffer = 0;
83 }
84 position += 1;
85 }
86
87 if (bits === 12) {
88 buffer = buffer >> 4;
89 output.push(String.fromCharCode(buffer & 0xFF));
90 } else if (bits === 18) {
91 buffer = buffer >> 2;
92 output.push(String.fromCharCode((buffer >> 8) & 0xFF));
93 output.push(String.fromCharCode(buffer & 0xFF));
94 }
95
96 return output.join('');
97};
10function browserAtob(input) {
11 try {
12 return window.atob(input);
13 } catch (e) {
14 return null;
15 }
16}
94function atob( coded ) {
95 var i;
96
97 if ( ! c ) {
98 init();
99 }
100
101 coded = coded.replace( /[^A-Za-z0-9\+\/\=]/g, '' );
102 coded = String(coded).split('=');
103 i = coded.length;
104
105 do {
106 --i;
107 coded[i] = code( coded[i], true, r64, a256, 6, 8 );
108 } while ( i > 0 );
109
110 coded = coded.join('');
111 return coded;
112}

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