From f611e6f1ffe65e0ffeacf614b76cb113931484fa Mon Sep 17 00:00:00 2001
From: xieqiyu <xieqiyu@chandao.com>
Date: Tue, 19 Aug 2025 08:08:08 +0000
Subject: [PATCH 1/2]  * [bug#64850] Switch file name to lower when adjust
 extention.

---
 module/file/control.php | 2 +-
 module/file/model.php   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/module/file/control.php b/module/file/control.php
index b449879bd3..3b2d542956 100755
--- a/module/file/control.php
+++ b/module/file/control.php
@@ -162,7 +162,7 @@ class file extends control
         if($mode != 'open')
         {
             $fileName = $file->title;
-            if(!preg_match("/\.{$file->extension}$/", $fileName)) $fileName .= '.' . $file->extension;
+            if(!preg_match("/\.{$file->extension}$/", strtolower($fileName))) $fileName .= '.' . $file->extension;
             return $this->sendDownHeader($fileName, $file->extension, $file->realPath, 'file');
         }
 
diff --git a/module/file/model.php b/module/file/model.php
index 739d6f75de..911048dce5 100755
--- a/module/file/model.php
+++ b/module/file/model.php
@@ -1028,7 +1028,7 @@ class fileModel extends model
 
         /* Append the extension name auto. */
         $extension = $fileType ? ('.' . $fileType) : '';
-        if($extension && strpos($fileName, $extension) === false) $fileName .= $extension;
+        if($extension && strpos(strtolower($fileName), $extension) === false) $fileName .= $extension;
 
         /* Judge the content type. */
         $mimes       = $this->config->file->mimes;

From 55456ed8deb3dba1210e24ac65a8d0a48560e3f9 Mon Sep 17 00:00:00 2001
From: xieqiyu <xieqiyu@chandao.com>
Date: Tue, 19 Aug 2025 08:29:30 +0000
Subject: [PATCH 2/2]  * [bug#64850] Modify the unit test file of
 fileModel::sendDownHeader.

---
 module/file/test/model/senddownheader.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/module/file/test/model/senddownheader.php b/module/file/test/model/senddownheader.php
index 7b3f01c563..8c8ff32508 100644
--- a/module/file/test/model/senddownheader.php
+++ b/module/file/test/model/senddownheader.php
@@ -9,6 +9,8 @@ cid=0
 - 根据内容下载。 @test
 - 文件路径是非法路径。 @0
 - 根据文件路径下载。 @test1
+- 测试扩展名大写。 @test2
+- 测试没有扩展名。 @test3
 
 */
 include dirname(__FILE__, 5) . '/test/lib/init.php';
@@ -36,6 +38,8 @@ try
 {
     r($fileModel->sendDownHeader('test.txt', 'txt', 'test.txt', 'file'))    && p() && e('0');      //文件路径是非法路径。
     r($fileModel->sendDownHeader('test.txt', 'txt', $downloadFile, 'file')) && p() && e('test1');  //根据文件路径下载。
+    r($fileModel->sendDownHeader('test.TXT', 'txt', $downloadFile, 'file')) && p() && e('test2');  //测试扩展名大写。
+    r($fileModel->sendDownHeader('test',     'txt', $downloadFile, 'file')) && p() && e('test3');  //测试没有扩展名。
 }
 catch(EndResponseException $e){}