feat(cache)_: add x-cache-level header

go-proxy-cache/internal/httpserver/cache_handlers.go

@@ -43,7 +43,10 @@ func (s *Server) handleGet(w http.ResponseWriter, r *http.Request) {
 		Fresh:       result.Fresh,
 		Data:        result.Data,
 		Key:         result.Key,
+		CacheType:   result.CacheType,
+		TTL:         result.TTL,
 		CacheStatus: cacheStatus,
+		CacheLevel:  result.CacheLevel,
 	})
 }
 

go-proxy-cache/internal/httpserver/types.go

@@ -23,4 +23,5 @@ type CacheResponse struct {
 	TTL         int                `json:"ttl,omitempty"`
 	Error       string             `json:"error,omitempty"`
 	CacheStatus models.CacheStatus `json:"cache_status,omitempty"` // HIT, MISS, or BYPASS
+	CacheLevel  models.CacheLevel  `json:"cache_level,omitempty"`  // L1, L2, or MISS
 }