Currently, I am using an express server that is written in typescript.
While atob() and btoa() function well within browsers, they do not work on Nodejs environment.
Typically, we rely on
Buffer.from("some-string").toString('base64')Unfortunately, when I attempt to implement this in TypeScript, it does not seem to be functioning properly. Any guidance on resolving this issue would be greatly appreciated.
When working with Node.js and TypeScript:
import { Buffer } from "buffer";
const base64String = "SGVsbG8sIFdvcmxkIQ==";
const textString = 'Hello, World!'
const decodeBase64 = (str: string):string => Buffer.from(str, 'base64').toString('binary');
const encodeBase64 = (str: string):string => Buffer.from(str, 'binary').toString('base64');
test('Base64 decoding', () => {
expect(decodeBase64(base64String)).toEqual(textString)
});
test('Base64 encoding', () => {
expect(encodeBase64(textString)).toEqual(base64String)
});
test('Base64 encoding/decoding', () => {
expect(decodeBase64(encodeBase64(textString))).toEqual(textString)
});
If you have previously utilized window.btoa(fileData) in the frontend code.
PLEASE NOTE: Following feedback from zerkms and a review of the package code, it appears that manual processing is sufficient. Although, I did need to run it twice to achieve success.
I was particularly attempting to decode a large image file.
In a Node.js server environment, you can directly utilize the Buffer solution:
const b64 = "SGVsbG8sIFdvcmxkIQ==";
const fileDataProcessed = Buffer.from(b64, 'base64').toString('binary')
const decodedData = Buffer(fileDataProcessed, 'base64')
// You can now proceed to upload this code snippet to your s3 bucket or any other destination.
console.log(decodedData);
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