feat: crl support, metrics

internal/metrics/response_writer.go

@@ -0,0 +1,19 @@
+package metrics
+
+import "net/http"
+
+func newResponseWriter(w http.ResponseWriter) *responseWriter {
+	return &responseWriter{w, http.StatusOK}
+}
+
+func (rw *responseWriter) WriteHeader(code int) {
+	rw.statusCode = code
+	if code != http.StatusOK {
+		rw.ResponseWriter.WriteHeader(code)
+	}
+}
+
+type responseWriter struct {
+	http.ResponseWriter
+	statusCode int
+}