From 459d2bc8cd0ef3a10e88eb635fd91296cc94edc8 Mon Sep 17 00:00:00 2001
From: DevEnv nis2-agile <dev@certisource.it>
Date: Tue, 10 Mar 2026 10:28:28 +0100
Subject: [PATCH] [FIX] simulate-nis2.php: SSE heartbeat ogni 25s + Apache
 Timeout 1800

- SSE heartbeat (commento ': heartbeat') ogni 25s in simLog() per mantenere
  viva la connessione attraverso proxy/CDN con timeout 300s (pattern lg231)
- Apache vhost: Timeout 1800 + ProxyTimeout 1800 (su Hetzner direttamente)
  per simulazioni che richiedono 8-12 minuti

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 simulate-nis2.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/simulate-nis2.php b/simulate-nis2.php
index 83bf325..00282f6 100644
--- a/simulate-nis2.php
+++ b/simulate-nis2.php
@@ -85,6 +85,7 @@ $S = [
 
 function simLog(string $msg, string $type = 'info'): void
 {
+    static $lastHeartbeat = 0;
     $ts = date('H:i:s');
     if (IS_CLI) {
         $prefix = [
@@ -99,6 +100,12 @@ function simLog(string $msg, string $type = 'info'): void
         echo "[$ts] {$prefix} {$msg}\n";
         flush();
     } else {
+        // Heartbeat SSE ogni 25s — mantiene viva la connessione attraverso proxy (pattern lg231)
+        $now = time();
+        if ($now - $lastHeartbeat >= 25) {
+            echo ": heartbeat " . $ts . "\n\n";
+            $lastHeartbeat = $now;
+        }
         echo 'data: ' . json_encode(['t' => $type, 'm' => "[$ts] $msg"]) . "\n\n";
         flush();
     }