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