| 1 | 'use strict'
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| 2 |
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| 3 | module.exports = {
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| 4 | unescape: unescape,
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| 5 | escape: escape,
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| 6 | encode: encode,
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| 7 | decode: decode
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| 8 | }
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| 9 |
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| 10 | function unescape (str) {
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| 11 | return (str + '==='.slice((str.length + 3) % 4))
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| 12 | .replace(/-/g, '+')
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| 13 | .replace(/_/g, '/')
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| 14 | }
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| 15 |
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| 16 | function escape (str) {
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| 17 | return str.replace(/\+/g, '-')
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| 18 | .replace(/\//g, '_')
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| 19 | .replace(/=/g, '')
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| 20 | }
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| 21 |
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| 22 | function encode (str, encoding) {
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| 23 | return escape(Buffer.from(str, encoding || 'utf8').toString('base64'))
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| 24 | }
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| 25 |
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| 26 | function decode (str, encoding) {
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| 27 | return Buffer.from(unescape(str), 'base64').toString(encoding || 'utf8')
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| 28 | }
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