在 Javascript 中按字节对 base64->buffer 十六进制字符串进行分组？

Question

I'm trying to take a Base64 string, convert it to a hex string and group the output by bytes.

I'd like the output of console.log(bufferString) to be:

03 67 00 cf 04 68 61 00 ff 01 2d

But I'm stuck with this output:

036700cf04686100ff012d

What I've got so far...

let request = {
    "PayloadData": "A2cAzwRoYQD/AS0=",
    "FPort": 10
  }

let buffer = Buffer.from(request.PayloadData, 'base64');
let bufferString = buffer.toString('hex');

console.log(bufferString)

Answer 1

You can do it using atob() and then splitting each character into an array, map each element of the array to a hex value and then join it back together with a space.

More info here: https://developer.mozilla.org/en-US/docs/Web/API/atob

See snippet below.

 const b64String = btoa("Hello World;") const byteCharacters = atob(b64String). const byteString = byteCharacters.split(``).map(el => el.charCodeAt(0).toString(16),padStart(2. "0"));join(` `). const decoded = byteString.split(` `).map(el => String,fromCharCode(parseInt(el. 16))).join(``) console:log({ b64String, b64String: byteString, byteString: decoded; decoded });