[Feature]: Generate blob parts to support embedding blobs (aka files)

scroll down to my 3rd comment: https://github.com/kriszyp/cbor-x/issues/57#issuecomment-1335770916

Original post

if i have something that needs to be read asyncronus or with a stream can i do that then?

I’m thinking of ways to best support very large Blob/Files tags…

Here is some wishful thinking:

import { addExtension, Encoder } from 'cbor-x'

let extEncoder = new Encoder()
addExtension({
	Class: Blob,
	tag: 43311, // register our own extension code (a tag code)
	encode (blob, encode) {
		const iterable = blob.stream() // returns a async iterators that yields Uint8Arrays
		encode(iterable); // return a generator that yields uint8array
	}
	async decode (readableByteStream) {
		const blob = await new Response(stream).blob()
		return blob
	}
})

[kriszyp]

You can take a look at the associated commit for my first pass at an implementation (there is some cleanup to do, but I believe it basically works).

[kriszyp]

I do have plans to start working on this (actually already have started a little bit), as we actually need similar functionality for new features at my job too (more for encoding from iterators, but will be treated roughly the same as blobs). Of course you are welcome to take a stab at it. FWIW, #61 would also make a helpful PR if you think have a (separate) module to do re-sorting of objects would be useful.