46 lines
785 B
JavaScript
46 lines
785 B
JavaScript
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/**
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* Module dependencies.
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*/
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var Base64 = require('Base64');
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/**
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* Expose `base64_url_decode`
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*/
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module.exports = {
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encode: encode,
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decode: decode
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};
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/**
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* Encode a `base64` `encodeURIComponent` string
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*
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* @param {string} str
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* @public
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*/
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function encode(str) {
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return Base64.btoa(str)
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.replace(/\+/g, '-') // Convert '+' to '-'
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.replace(/\//g, '_') // Convert '/' to '_'
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.replace(/=+$/, ''); // Remove ending '='
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}
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/**
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* Decode a `base64` `encodeURIComponent` string
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*
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* @param {string} str
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* @public
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*/
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function decode(str) {
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// Add removed at end '='
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str += Array(5 - str.length % 4).join('=');
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str = str
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.replace(/\-/g, '+') // Convert '-' to '+'
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.replace(/\_/g, '/'); // Convert '_' to '/'
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return Base64.atob(str);
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}
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