add domain whois/dns support, refactor codebase

utils/health.go

@@ -0,0 +1,22 @@
+package utils
+
+import (
+	"log/slog"
+	"net/http"
+)
+
+// HealthCheck Returns a simple health check handler.
+func HealthCheck() http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, err := w.Write([]byte("OK"))
+		if err != nil {
+			slog.Warn("failed to write healthcheck response",
+				"component", "healthcheck",
+				"method", r.Method,
+				"path", r.URL.Path,
+				"error", err,
+			)
+		}
+	})
+}

utils/health/health.go

@@ -1,15 +0,0 @@
-package utils
-
-import (
-	"net/http"
-)
-
-// Returns a simple health check handler
-func HealthCheck() http.Handler {
-	mux := http.NewServeMux()
-	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
-		w.Write([]byte("OK"))
-	})
-	return mux
-}

utils/iputils.go

@@ -4,7 +4,7 @@ import (
 	"net"
 )
 
-// Contains a list of known bogon IP ranges
+// BogonNets Contains a list of known bogon IP ranges
 var BogonNets = []*net.IPNet{
 	// IPv4
 	{IP: net.IPv4(0, 0, 0, 0), Mask: net.CIDRMask(8, 32)},          // "This" network