From 40f4f6546f63518e06482da5604ca492f0d06d9e Mon Sep 17 00:00:00 2001
From: awaae <108462724+awaae001@users.noreply.github.com>
Date: Thu, 24 Sep 2026 02:20:20 +0900
Subject: [PATCH] fix(ftp): handle EOF and detect content type from read bytes
 (#3125)

---
 server/ftp/fsup.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/server/ftp/fsup.go b/server/ftp/fsup.go
index 7a96a4f65..1894fc0ee 100644
--- a/server/ftp/fsup.go
+++ b/server/ftp/fsup.go
@@ -94,10 +94,11 @@ func (f *FileUploadProxy) Close() error {
 		return err
 	}
 	arr := make([]byte, 512)
-	if _, err := f.buffer.Read(arr); err != nil {
+	n, err := f.buffer.Read(arr)
+	if err != nil && err != io.EOF {
 		return err
 	}
-	contentType := http.DetectContentType(arr)
+	contentType := http.DetectContentType(arr[:n])
 	if _, err := f.buffer.Seek(0, io.SeekStart); err != nil {
 		return err
 	}