base 64 encryption

https://stackoverflow.com/questions/6182315/how-to-do-base64-encoding-in-node-js

> console.log(new Buffer("Hello World").toString('base64'));
SGVsbG8gV29ybGQ=
> console.log(new Buffer("SGVsbG8gV29ybGQ=", 'base64').toString('ascii'))
Hello World

https://stackoverflow.com/questions/14573001/nodejs-how-to-decode-base64-encoded-string-back-to-binary

down voteaccepted


As of Node.js v6.0.0 using the constructor method has been deprecated and the following method should instead be used to construct a new buffer from a base64 encoded string:
var b64string = /* whatever */;
var buf = Buffer.from(b64string, 'base64'); // Ta-da

For Node.js v5.11.1 and below

Construct a new Buffer and pass 'base64' as the second argument:
var b64string = /* whatever */;
var buf = new Buffer(b64string, 'base64'); // Ta-da

If you want to be clean, you can check whether from exists :
if (typeof Buffer.from === "function") {
    // Node 5.10+
    buf = Buffer.from(b64string, 'base64'); // Ta-da
} else {
    // older Node versions
    buf = new Buffer(b64string, 'base64'); // Ta-da

https://stackoverflow.com/questions/23097928/node-js-btoa-is-not-defined-error

166down voteaccepted


The 'btoa-atob' module does not export a programmatic interface, it only provides command line utilities.

If you need to convert to Base64 you could do so using Buffer:
console.log(Buffer.from('Hello World!').toString('base64'));

Reverse (assuming the content you're decoding is a utf8 string):
console.log(Buffer.from(b64Encoded, 'base64').toString());