happyDomain/checker-sdk-go
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interactive: let standalone providers compose sibling observations

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Add an opt-in InteractiveRelatedProviders interface: a checker served
by /check can declare sibling ObservationProviders the SDK will run
in-process after the primary Collect. The SDK auto-fills any sibling
option tagged AutoFill==AutoFillDiscoveryEntries from the primary's
DiscoverEntries output, mirroring the host's AutoFill wiring so
siblings that work in-host work here too. Results are exposed through
ObservationGetter.GetRelated and ReportContext.Related, unblocking
cross-checker rules (e.g. DANE reading checker-tls probes) on the
standalone /check flow.
This commit is contained in:
nemunaire 2026-04-24 11:19:59 +07:00
commit c244ca48c6
4 changed files with 251 additions and 12 deletions
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20
checker/server.go
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@ -380,9 +380,13 @@ func (s *Server) handleReport(w http.ResponseWriter, r *http.Request) {
writeJSON(w, http.StatusOK, metrics)
}
// mapObservationGetter implements ObservationGetter backed by a static map.
// mapObservationGetter implements ObservationGetter backed by static maps.
// Both fields are optional: Get reads from data, GetRelated reads from
// related. Leaving related nil preserves the pre-existing "no lineage"
// behavior used by the remote /evaluate path.
type mapObservationGetter struct {
data map[ObservationKey]json.RawMessage
data map[ObservationKey]json.RawMessage
related map[ObservationKey][]RelatedObservation
}
func (g *mapObservationGetter) Get(ctx context.Context, key ObservationKey, dest any) error {
@ -393,13 +397,13 @@ func (g *mapObservationGetter) Get(ctx context.Context, key ObservationKey, dest
return json.Unmarshal(raw, dest)
}
// GetRelated always returns nil in the remote /evaluate path: the host that
// invokes /evaluate does not (currently) carry cross-checker related data in
// ExternalEvaluateRequest. Consumers that need related observations must run
// evaluation locally with a host-side ObservationContext that resolves
// lineage.
// GetRelated returns the pre-resolved related observations for key, or nil
// when none were seeded. The remote /evaluate path leaves related nil
// because ExternalEvaluateRequest does not currently carry cross-checker
// lineage; the interactive /check path can seed it from sibling providers
// declared via InteractiveRelatedProviders.
func (g *mapObservationGetter) GetRelated(ctx context.Context, key ObservationKey) ([]RelatedObservation, error) {
return nil, nil
return g.related[key], nil
}
func writeJSON(w http.ResponseWriter, status int, v any) {