Re: QUERY-supporting http server online

 FWIW I have a use case for QUERY, I think.

When I was at AWS I worked on this software package called Ruler that’s now
open-sourced as aws/event-ruler <https://github.com/aws/event-ruler> - in
recent years I’ve done a repeat in Go, see timbray/quamina
<https://github.com/timbray/quamina>.  What they do is allow you to compile
a bunch of “patterns" together into a matcher, and then show JSON blobs at
the matcher and it tells you which patterns matched them, in a time that is
(a) very fast and (b) roughly O(1) in the number of patterns.  Ruler is
widely used both in AWS and Amazon retail, these things operate at huge
scale and really like the performance curve.

Anyhow, the patterns present as Json objects, of arbitrary size/complexity.
See either project’s README.  Adding a pattern is idempotent and incurs no
obligations. But you need to send an application/json payload along. So,
QUERY would be just the ticket.