解码utf8字符串（图像）以在node.js中缓冲/图像

Question

I'm receiving an image in a stream as shown below that is ( imageBuffer.toString('utf8')) converted to utf8 string before receiving, however when I try to create a buffer with the following data the buffer appears to be different and not able to recreate image.

msg = ExifII* DuckyF ,Photoshop 3.08BIM%? ?Adobed ↵→→→→↵↵ ↵ ?↵↵???? g →?!1AQa"?q 2 B# R3ђ $T bCSD %EU r cs !1Q?A "a2q B# ? 65 ] jF(mR $Pm * a F H7҄ Ҁ 7D (

console.log( typeOf msg ) => string

So far I have tried this:

let buffer = Buffer.from(msg, 'utf8');
let writable = require('fs').createWriteStream( '/home/test.jpg);
writable.write(buffer);
writable.end();

Problem is: Not able to reproduce the same image. output buffer size is different from input buffer of the image.

Answer 1

Use

let buffer = Buffer.from(new Uint8Array(msg));
...

Answer 2

Do not send binary as utf-8 string. Try base64:

imageBuffer.toString('base64')

and:

let buffer = Buffer.from(msg, 'base64');