45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
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//BASE64 ENCODING MODULE
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const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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const Base64 = {
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btoa: (input = '') => {
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let str = input;
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let output = '';
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for (let block = 0, charCode, i = 0, map = chars;
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str.charAt(i | 0) || (map = '=', i % 1);
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output += map.charAt(63 & block >> 8 - i % 1 * 8)) {
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charCode = str.charCodeAt(i += 3/4);
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if (charCode > 0xFF) {
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throw new Error("'btoa' failed: The string to be encoded contains characters outside of the Latin1 range.");
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}
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block = block << 8 | charCode;
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}
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return output;
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},
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atob: (input = '') => {
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let str = input.replace(/=+$/, '');
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let output = '';
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if (str.length % 4 == 1) {
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throw new Error("'atob' failed: The string to be decoded is not correctly encoded.");
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}
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for (let bc = 0, bs = 0, buffer, i = 0;
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buffer = str.charAt(i++);
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~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
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bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0
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) {
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buffer = chars.indexOf(buffer);
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}
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return output;
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}
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}
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export default Base64 |