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Base64 encode in javascript
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| function base64encode (s) { | |
| // from https://gist.github.com/stubbetje/229984 | |
| const base64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split('') | |
| const l = s.length | |
| let o = '' | |
| for (let i = 0; i < l; i++) { | |
| const byte0 = s.charCodeAt(i++) & 0xff | |
| const byte1 = s.charCodeAt(i++) & 0xff | |
| const byte2 = s.charCodeAt(i) & 0xff | |
| o += base64[byte0 >> 2] | |
| o += base64[((byte0 & 0x3) << 4) | (byte1 >> 4)] | |
| const t = i - l | |
| if (t >= 0) { | |
| if (t === 0) { | |
| o += base64[((byte1 & 0x0f) << 2) | (byte2 >> 6)] | |
| o += base64[64] | |
| } else { | |
| o += base64[64] | |
| o += base64[64] | |
| } | |
| } else { | |
| o += base64[((byte1 & 0x0f) << 2) | (byte2 >> 6)] | |
| o += base64[byte2 & 0x3f] | |
| } | |
| } | |
| return o | |
| } |
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