On Tue, Apr 18, 2017 at 1:28 AM, Hugo Landau <[email protected]> wrote:

> >    Hey Hugo,
> >    Thanks for the PR.  Jacob and I chatted a bit about this, and wanted
> to
> >    propose a slightly different approach:
> >    [1]https://github.com/ietf-wg-acme/acme/pull/297
> >    What do you think?  Others on the list have any thoughts?
>
> This looks mostly OK.
>
> My only concern is that it's not clear how a client can determine when a
> server is still attempting automatic retries. Is this to be detected via
> the absence of the Retry-After header? Something more explicit might be
> nicer (and less susceptible to misimplementation).
>

The idea is that as long as the challenge status is still "pending", the
server is still retrying.  Once it gives up, it marks the challenge as
"invalid".


> Also, is each automatic retry to result in an error being appended if
> unsuccessful? This could get quite spammy depending on how many times a
> server repeats verification. Possibly amendment of the problem document
> format to add a repeat count (in the spirit of "last message repeated N
> times") might be desirable. Or that might be my usual overengineering.
>

Yeah, I'm not to worried about spamminess here.  The server can always
limit the number of retries.

--Richard



>
> Hugo Landau
>
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