47 lines
1.6 KiB
TypeScript
47 lines
1.6 KiB
TypeScript
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const custom = {
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encode (input:any) {
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let _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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let output = "";
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let chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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let i = 0;
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input = this.utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
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_keyStr.charAt(enc3) + _keyStr.charAt(enc4);
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}
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return output;
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},
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utf8_encode(input) {
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input = input.replace(/\r\n/g,"\n");
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let utftext = "";
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for (let n = 0; n < input.length; n++) {
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let c = input.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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} else if((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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} else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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}
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}
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module.exports = custom
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