Re: [media-types] Multipart without boundaries

Thanks for your submission!

The definition of new media types is outside of the charter of MEDIAMAN, 
though.

Personally, I think that using "content-length:" for generic multipart 
content is likely to be a design mistake - there's too much processing 
that subtly alters the length of the message. It would only be 
dependable if you were to pair it with a message checksumming mechanism 
such as Content-MD5 so that content modifications could be detected - 
and it would still not allow you to reconstruct the original message if 
the signature was broken by a transform.

Content delimiting is a subject with long traditions - the "chunked" 
content-transfer-encoding and the delimiting of message bodies in 
HTTP/1.1 are just two of the areas in which it has been approached.

On 3/15/24 10:18, Rahul Gupta wrote:
> Hello Media-type enthusiasts,
>
> I am proposing a new Internet-Draft "Multipart without Boundaries".
> https://cxres.github.io/multipart-without-boundaries/draft-gupta-mediaman-multipart-without-boundaries.html
>
> Like the title says, it proposes a new syntax that uses `Content-Length` in each part and thus does not use boundary delimiter to separate encapsulated parts. As explained in the draft, this solves an outstanding issue when parts are dynamically generated (and generally simplifies parsing), especially when used in notification protocols (It is inspired from Braid's subscription response, but respects existing HTTP content-type conventions).
>
> One issue that I faced while writing this draft is that I could not find a IANA registration for the "boundary" parameter for "multipart" media-type in any of the registries. So I am not sure of what instructions to give to IANA for the "no-boundary" parameter.
>
> This is a tiny draft that solves a very specific and limited issue. I know that I am too late for I-D submission and publishing it almost on the eve of the Brisbane round, but I would still appreciate it if the Chair could please sneak it in at least as an announcement (or 5 minute discussion) in the Mediaman session.
>
> Thanks in advance,
>
> Best Regards,
> Rahul
>
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