From 7016057b01f0ed3ec3ba1f31a580b6661667c2e1 Mon Sep 17 00:00:00 2001
From: Yanick Witschi <yanick.witschi@terminal42.ch>
Date: Tue, 27 Jul 2021 13:26:46 +0200
Subject: [PATCH] [HttpFoundation] Fixed type mismatch

---
 Response.php           | 2 +-
 Tests/ResponseTest.php | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Response.php b/Response.php
index a9cea09b3..e6b913f41 100644
--- a/Response.php
+++ b/Response.php
@@ -311,7 +311,7 @@ public function prepare(Request $request)
         }
 
         // Check if we need to send extra expire info headers
-        if ('1.0' == $this->getProtocolVersion() && str_contains($headers->get('Cache-Control'), 'no-cache')) {
+        if ('1.0' == $this->getProtocolVersion() && str_contains($headers->get('Cache-Control', ''), 'no-cache')) {
             $headers->set('pragma', 'no-cache');
             $headers->set('expires', -1);
         }
diff --git a/Tests/ResponseTest.php b/Tests/ResponseTest.php
index f26302eef..d4b8812d9 100644
--- a/Tests/ResponseTest.php
+++ b/Tests/ResponseTest.php
@@ -578,6 +578,12 @@ public function testPrepareSetsPragmaOnHttp10Only()
         $this->assertEquals('no-cache', $response->headers->get('pragma'));
         $this->assertEquals('-1', $response->headers->get('expires'));
 
+        $response = new Response('foo');
+        $response->headers->remove('cache-control');
+        $response->prepare($request);
+        $this->assertFalse($response->headers->has('pragma'));
+        $this->assertFalse($response->headers->has('expires'));
+
         $request->server->set('SERVER_PROTOCOL', 'HTTP/1.1');
         $response = new Response('foo');
         $response->prepare($request);