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feat(base64): Base64 enhancements (#905)

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* fix(base64): use js-base64 to handle non ascii text

Use js-base64 to handle non ascii text and ignore whitespaces
Fix #879 and #409

* fix(base64): use js-base64 to handle non ascii text

Use js-base64 to handle non ascii text and ignore whitespaces
Fix #879 and #409

* feat(base64 file converter): add a filename and extension fields

Add filename and extension (auto filled if data url) to allow downloading with right extension and filename
Fix #788

* feat(base64 file converter): add a preview image

Fix #594. Taken from #595 (thanks @SAF2k)
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sharevb 2024-05-20 22:13:55 +02:00 • committed by GitHub
parent e876d03608
commit 30144aa3f5
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GPG key ID: B5690EEEBB952194
6 changed files with 164 additions and 38 deletions
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13
src/utils/base64.test.ts
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@ -38,7 +38,8 @@ describe('base64 utils', () => {
it('should throw for incorrect base64 string', () => {
expect(() => base64ToText('a')).to.throw('Incorrect base64 string');
expect(() => base64ToText(' ')).to.throw('Incorrect base64 string');
// should not really be false because trimming of space is now implied
// expect(() => base64ToText(' ')).to.throw('Incorrect base64 string');
expect(() => base64ToText('é')).to.throw('Incorrect base64 string');
// missing final '='
expect(() => base64ToText('bG9yZW0gaXBzdW0')).to.throw('Incorrect base64 string');
@ -56,17 +57,17 @@ describe('base64 utils', () => {
it('should return false for incorrect base64 string', () => {
expect(isValidBase64('a')).to.eql(false);
expect(isValidBase64(' ')).to.eql(false);
expect(isValidBase64('é')).to.eql(false);
expect(isValidBase64('data:text/plain;notbase64,YQ==')).to.eql(false);
// missing final '='
expect(isValidBase64('bG9yZW0gaXBzdW0')).to.eql(false);
});
it('should return false for untrimmed correct base64 string', () => {
expect(isValidBase64('bG9yZW0gaXBzdW0= ')).to.eql(false);
expect(isValidBase64(' LTE=')).to.eql(false);
expect(isValidBase64(' YQ== ')).to.eql(false);
it('should return true for untrimmed correct base64 string', () => {
expect(isValidBase64('bG9yZW0gaXBzdW0= ')).to.eql(true);
expect(isValidBase64(' LTE=')).to.eql(true);
expect(isValidBase64(' YQ== ')).to.eql(true);
expect(isValidBase64(' ')).to.eql(true);
});
});

11
src/utils/base64.ts
View file

@ -1,7 +1,9 @@
import { Base64 } from 'js-base64';
export { textToBase64, base64ToText, isValidBase64, removePotentialDataAndMimePrefix };
function textToBase64(str: string, { makeUrlSafe = false }: { makeUrlSafe?: boolean } = {}) {
const encoded = window.btoa(str);
const encoded = Base64.encode(str);
return makeUrlSafe ? makeUriSafe(encoded) : encoded;
}
@ -16,7 +18,7 @@ function base64ToText(str: string, { makeUrlSafe = false }: { makeUrlSafe?: bool
}
try {
return window.atob(cleanStr);
return Base64.decode(cleanStr);
}
catch (_) {
throw new Error('Incorrect base64 string');
@ -34,10 +36,11 @@ function isValidBase64(str: string, { makeUrlSafe = false }: { makeUrlSafe?: boo
}
try {
const reEncodedBase64 = Base64.fromUint8Array(Base64.toUint8Array(cleanStr));
if (makeUrlSafe) {
return removePotentialPadding(window.btoa(window.atob(cleanStr))) === cleanStr;
return removePotentialPadding(reEncodedBase64) === cleanStr;
}
return window.btoa(window.atob(cleanStr)) === cleanStr;
return reEncodedBase64 === cleanStr.replace(/\s/g, '');
}
catch (err) {
return false;