33 lines
679 B
JavaScript
33 lines
679 B
JavaScript
var atob = require('./atob');
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function b64DecodeUnicode(str) {
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return decodeURIComponent(atob(str).replace(/(.)/g, function (m, p) {
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var code = p.charCodeAt(0).toString(16).toUpperCase();
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if (code.length < 2) {
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code = '0' + code;
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}
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return '%' + code;
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}));
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}
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module.exports = function(str) {
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var output = str.replace(/-/g, "+").replace(/_/g, "/");
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switch (output.length % 4) {
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case 0:
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break;
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case 2:
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output += "==";
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break;
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case 3:
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output += "=";
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break;
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default:
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throw "Illegal base64url string!";
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}
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try{
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return b64DecodeUnicode(output);
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} catch (err) {
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return atob(output);
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}
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};
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