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feat(base64-string-converter): switch to encode and decode url safe base64 strings (#392)

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* feat(base64-string-converter): switch to encode and decode url safe

* feat(base64-string-converter): changes based on review comments, use config object instead of boolean argument.

* feat(base64-string-converter): fix validation, add option to watch additional refs for changes which interfere with validation rules
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cgoIT 2023-05-15 14:35:44 +02:00 • committed by GitHub
parent 8c92d56318
commit 0b20f1c16a
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4 changed files with 72 additions and 12 deletions
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39
src/utils/base64.ts
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@ -1,15 +1,19 @@
export { textToBase64, base64ToText, isValidBase64, removePotentialDataAndMimePrefix };
function textToBase64(str: string) {
return window.btoa(str);
function textToBase64(str: string, { makeUrlSafe = false }: { makeUrlSafe?: boolean } = {}) {
const encoded = window.btoa(str);
return makeUrlSafe ? makeUriSafe(encoded) : encoded;
}
function base64ToText(str: string) {
if (!isValidBase64(str)) {
function base64ToText(str: string, { makeUrlSafe = false }: { makeUrlSafe?: boolean } = {}) {
if (!isValidBase64(str, { makeUrlSafe: makeUrlSafe })) {
throw new Error('Incorrect base64 string');
}
const cleanStr = removePotentialDataAndMimePrefix(str);
let cleanStr = removePotentialDataAndMimePrefix(str);
if (makeUrlSafe) {
cleanStr = unURI(cleanStr);
}
try {
return window.atob(cleanStr);
@ -22,12 +26,33 @@ function removePotentialDataAndMimePrefix(str: string) {
return str.replace(/^data:.*?;base64,/, '');
}
function isValidBase64(str: string) {
const cleanStr = removePotentialDataAndMimePrefix(str);
function isValidBase64(str: string, { makeUrlSafe = false }: { makeUrlSafe?: boolean } = {}) {
let cleanStr = removePotentialDataAndMimePrefix(str);
if (makeUrlSafe) {
cleanStr = unURI(cleanStr);
}
try {
if (makeUrlSafe) {
return removePotentialPadding(window.btoa(window.atob(cleanStr))) === cleanStr;
}
return window.btoa(window.atob(cleanStr)) === cleanStr;
} catch (err) {
return false;
}
}
function makeUriSafe(encoded: string) {
return encoded.replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
}
function unURI(encoded: string): string {
return encoded
.replace(/-/g, '+')
.replace(/_/g, '/')
.replace(/[^A-Za-z0-9+/]/g, '');
}
function removePotentialPadding(str: string) {
return str.replace(/=/g, '');
}