mirror of
https://github.com/CorentinTh/it-tools.git
synced 2025-05-06 06:17:11 -04:00
46 lines
1.4 KiB
JavaScript
46 lines
1.4 KiB
JavaScript
function textToBase64(str, { makeUrlSafe = false } = {}) {
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const encoded = window.btoa(str);
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return makeUrlSafe ? makeUriSafe(encoded) : encoded;
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}
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function base64ToText(str, { makeUrlSafe = false } = {}) {
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if (!isValidBase64(str, { makeUrlSafe })) {
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throw new Error("Incorrect base64 string");
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}
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let cleanStr = removePotentialDataAndMimePrefix(str);
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if (makeUrlSafe) {
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cleanStr = unURI(cleanStr);
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}
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try {
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return window.atob(cleanStr);
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} catch (_) {
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throw new Error("Incorrect base64 string");
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}
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}
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function removePotentialDataAndMimePrefix(str) {
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return str.replace(/^data:.*?;base64,/, "");
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}
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function isValidBase64(str, { makeUrlSafe = false } = {}) {
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let cleanStr = removePotentialDataAndMimePrefix(str);
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if (makeUrlSafe) {
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cleanStr = unURI(cleanStr);
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}
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try {
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if (makeUrlSafe) {
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return removePotentialPadding(window.btoa(window.atob(cleanStr))) === cleanStr;
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}
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return window.btoa(window.atob(cleanStr)) === cleanStr;
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} catch (err) {
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return false;
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}
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}
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function makeUriSafe(encoded) {
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return encoded.replace(/=/g, "").replace(/\+/g, "-").replace(/\//g, "_");
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}
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function unURI(encoded) {
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return encoded.replace(/-/g, "+").replace(/_/g, "/").replace(/[^A-Za-z0-9+/]/g, "");
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}
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function removePotentialPadding(str) {
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return str.replace(/=/g, "");
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}
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export { base64ToText as b, isValidBase64 as i, textToBase64 as t };
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