From 0e9d237623bbf12dfc52c779492ae2329f63d6da Mon Sep 17 00:00:00 2001
From: Duncan McClean <duncan@duncanmcclean.com>
Date: Tue, 7 May 2024 21:32:58 +0100
Subject: [PATCH 1/2] Add `Vary: X-Requested-With` header to CP responses

---
 .../Middleware/CP/AddVaryHeaderToResponse.php   | 17 +++++++++++++++++
 src/Providers/CpServiceProvider.php             |  2 ++
 2 files changed, 19 insertions(+)
 create mode 100644 src/Http/Middleware/CP/AddVaryHeaderToResponse.php

diff --git a/src/Http/Middleware/CP/AddVaryHeaderToResponse.php b/src/Http/Middleware/CP/AddVaryHeaderToResponse.php
new file mode 100644
index 0000000000..ea1c33d7f0
--- /dev/null
+++ b/src/Http/Middleware/CP/AddVaryHeaderToResponse.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Statamic\Http\Middleware\CP;
+
+use Closure;
+
+class AddVaryHeaderToResponse
+{
+    public function handle($request, Closure $next)
+    {
+        $response = $next($request);
+
+        $response->headers->set('Vary', 'X-Requested-With');
+
+        return $response;
+    }
+}
diff --git a/src/Providers/CpServiceProvider.php b/src/Providers/CpServiceProvider.php
index 9b9c2e5256..44afe3ad43 100644
--- a/src/Providers/CpServiceProvider.php
+++ b/src/Providers/CpServiceProvider.php
@@ -11,6 +11,7 @@
 use Statamic\Extensions\Translation\Translator;
 use Statamic\Facades\User;
 use Statamic\Fieldtypes\Sets;
+use Statamic\Http\Middleware\CP\AddVaryHeaderToResponse;
 use Statamic\Http\View\Composers\CustomLogoComposer;
 use Statamic\Http\View\Composers\FieldComposer;
 use Statamic\Http\View\Composers\JavascriptComposer;
@@ -92,6 +93,7 @@ protected function registerMiddlewareGroups()
             \Statamic\Http\Middleware\CP\BootPreferences::class,
             \Statamic\Http\Middleware\CP\BootUtilities::class,
             \Statamic\Http\Middleware\CP\CountUsers::class,
+            \Statamic\Http\Middleware\CP\AddVaryHeaderToResponse::class,
             \Statamic\Http\Middleware\DeleteTemporaryFileUploads::class,
         ]);
     }

From 8d7b75948ad042303443bdf7368e56e5c4105bc0 Mon Sep 17 00:00:00 2001
From: duncanmcclean <duncanmcclean@users.noreply.github.com>
Date: Tue, 7 May 2024 20:34:40 +0000
Subject: [PATCH 2/2] Fix styling

---
 src/Providers/CpServiceProvider.php | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/Providers/CpServiceProvider.php b/src/Providers/CpServiceProvider.php
index 44afe3ad43..3a034fb106 100644
--- a/src/Providers/CpServiceProvider.php
+++ b/src/Providers/CpServiceProvider.php
@@ -11,7 +11,6 @@
 use Statamic\Extensions\Translation\Translator;
 use Statamic\Facades\User;
 use Statamic\Fieldtypes\Sets;
-use Statamic\Http\Middleware\CP\AddVaryHeaderToResponse;
 use Statamic\Http\View\Composers\CustomLogoComposer;
 use Statamic\Http\View\Composers\FieldComposer;
 use Statamic\Http\View\Composers\JavascriptComposer;