happyDomain/checker-sdk-go
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checker: add CheckEnabler interface for data-driven eligibility

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Add an optional CheckEnabler interface that lets a provider decide, from
the actual target data, whether running the checker is meaningful at all
(e.g. reverse-zone outside in-addr.arpa, delegation without DNSSEC). The
result is folded into the POST /definition response via new Eligible and
EligibilityReason fields, and the handler now tracks load since IsEligible
may perform I/O.
This commit is contained in:
nemunaire 2026-05-29 21:07:45 +08:00
commit d387cd629b
3 changed files with 157 additions and 3 deletions
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19
checker/server/server.go
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@ -133,7 +133,7 @@ func New(provider checker.ObservationProvider) *Server {
s.definition = def
s.definition.BuildRulesInfo()
s.mux.HandleFunc("GET /definition", s.handleDefinition)
s.mux.HandleFunc("POST /definition", s.handlePrecheck)
s.mux.Handle("POST /definition", s.TrackWork(http.HandlerFunc(s.handlePrecheck)))
s.mux.Handle("POST /evaluate", s.TrackWork(http.HandlerFunc(s.handleEvaluate)))
}
}
@ -343,10 +343,23 @@ func (s *Server) handlePrecheck(w http.ResponseWriter, r *http.Request) {
failures[rule.Name()] = err.Error()
}
}
writeJSON(w, http.StatusOK, checker.RulePrecheckResponse{
resp := checker.RulePrecheckResponse{
CheckerDefinition: s.definition,
PrecheckFailures: failures,
})
}
if en, ok := s.provider.(checker.CheckEnabler); ok {
eligible, reason, err := en.IsEligible(r.Context(), req.Options)
if err != nil {
// Eligibility undetermined: leave Eligible nil so the host fails
// open (shows the checker), but surface the error for diagnostics.
log.Printf("IsEligible failed: %v", err)
resp.EligibilityReason = err.Error()
} else {
resp.Eligible = &eligible
resp.EligibilityReason = reason
}
}
writeJSON(w, http.StatusOK, resp)
}
func (s *Server) handleCollect(w http.ResponseWriter, r *http.Request) {