From 9431d0789a8340289f4b8d7a9af75b66d01c7477 Mon Sep 17 00:00:00 2001
From: Anne-Julia Seitz <dazz@users.noreply.github.com>
Date: Sat, 22 Mar 2025 07:38:20 +0100
Subject: [PATCH] fix StreamTransport.php

```
[Application] Mar 21 23:56:01 |CRITICA| REQUES Uncaught PHP Exception ErrorException: "Notice: ob_flush(): Failed to flush buffer. No buffer to flush" at StreamTransport.php line 50
```
---
 src/Server/Transport/Sse/StreamTransport.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Server/Transport/Sse/StreamTransport.php b/src/Server/Transport/Sse/StreamTransport.php
index 93db780..ff5626f 100644
--- a/src/Server/Transport/Sse/StreamTransport.php
+++ b/src/Server/Transport/Sse/StreamTransport.php
@@ -47,7 +47,9 @@ private function flushEvent(string $event, string $data): void
         echo sprintf('event: %s', $event).PHP_EOL;
         echo sprintf('data: %s', $data).PHP_EOL;
         echo PHP_EOL;
-        ob_flush();
+        if (ob_get_length() !== false) {
+            ob_flush();
+        }
         flush();
     }
 }