klarna and checkouts

cmd/checkout/utils.go

@@ -21,6 +21,19 @@ func getOriginalHost(r *http.Request) string {
 	return r.Host
 }
 
+// getScheme resolves the public scheme for building absolute URLs (e.g. Klarna
+// merchant_urls). Honors X-Forwarded-Proto set by the edge/dev proxy; defaults
+// to https so production (TLS terminated at nginx/ingress, no header) is correct.
+func getScheme(r *http.Request) string {
+	if proto := r.Header.Get("X-Forwarded-Proto"); proto != "" {
+		return proto
+	}
+	if r.TLS != nil {
+		return "https"
+	}
+	return "https"
+}
+
 func getClientIp(r *http.Request) string {
 	ip := r.Header.Get("X-Forwarded-For")
 	if ip == "" {