[Standards] XEP-0313: pending 0.7 update review

Matthew Wild mwild1 at gmail.com
Fri Apr 17 13:10:58 UTC 2020

On Fri, 17 Apr 2020 at 12:58, Florian Schmaus <flo at geekplace.eu> wrote:

> On 4/16/20 3:02 PM, Florian Schmaus wrote:
> > On 4/3/20 10:51 PM, Matthew Wild wrote:> The PRs are here:
> >>
> >> XEP-0313: https://github.com/xsf/xeps/pull/922
> >>
> >> Feedback very welcome, but I hope we can get this wrapped up and
> >> advanced to Draft where it should be soon!
> >
> > I have two further minor remarks:
> >
> > I wondered if "fetching a single message" shouldn't be "fetching
> > messages by a list of archive IDs", where single message fetching is
> > just using a list of size one. If we ever specify "fetch-by-id-list",
> > then we would end up with two ways to retrieve a single message by id,
> > which feels odd to me.
> The more I think about it the more I come to the conclusion that we
> should simply specify (and register) a well known field for message IDs
> with type list-multi, instead of doing the proposed single message
> fetching.

Yes, this is clearly an alternative option that I considered a bit before
siding with the current approach. I see advantages in both.

Plain <iq/>:

  + Simpler
  + Doesn't depend on data forms
  + Result can be embedded directly in the result
   - Restricted to fetching a single message

For query parameter:

  + Reuses the query and results mechanism that almost all clients will
already have implemented
  + Support for fetching multiple messages
  -  May be more complicated for servers to implement in combination with
other query params
  - No known use cases for fetching a list of known ids?

I think it would also require less code change compare to stuffing
> <forwarded/> into <iq/>. At least for Smack I think this is likely the
> case.

Sorry, but in discussions like this I have to say that Smack always
surprises me at how hard it is to do relatively simple things :)

I don't feel strongly on this issue one way or the other. I'd be curious if
anyone else does, or especially for any concrete use cases for fetching
multiple ids at once.

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