From da82d23652ed063b6be51b5340fc3ad6c5a798cb Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Mon, 2 Sep 2024 13:43:37 +0200
Subject: [PATCH] -fix filename

---
 src/examples2/demo.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/examples2/demo.c b/src/examples2/demo.c
index 4f26151c..05fb69b6 100644
--- a/src/examples2/demo.c
+++ b/src/examples2/demo.c
@@ -828,7 +828,14 @@ done_cb (struct MHD_Request *req,
                                            request_refused_response);
     goto cleanup;
   }
-
+  if (NULL == uc->filename)
+  {
+    fprintf (stderr,
+             "Filename unavailable!?\n");
+    ret = MHD_upload_action_from_response (req,
+                                           internal_error_response);
+    goto cleanup;
+  }
   if (0 !=
       rename (uc->tmpname,
               uc->filename))