From 016a5d240b893a782f67af868801dd2e8861a756 Mon Sep 17 00:00:00 2001
From: Shish <shish@shishnet.org>
Date: Mon, 3 Jul 2023 15:09:38 +0100
Subject: [PATCH] truncate filenames to 250 chars, fixes #931

---
 core/basepage.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/core/basepage.php b/core/basepage.php
index acfc094e..c644dfbd 100644
--- a/core/basepage.php
+++ b/core/basepage.php
@@ -80,6 +80,12 @@ class BasePage
      */
     public function set_filename(string $filename, string $disposition = "attachment"): void
     {
+        $max_len = 250;
+        if(strlen($filename) > $max_len) {
+            // remove extension, truncate filename, apply extension
+            $ext = pathinfo($filename, PATHINFO_EXTENSION);
+            $filename = substr($filename, 0, $max_len - strlen($ext) - 1) . '.' . $ext;
+        }
         $this->filename = $filename;
         $this->disposition = $disposition;
     }