Support Laraval Cloud caching

Author: kapersoft

app/Http/Controllers/ProxyController.php

@@ -38,10 +38,19 @@ public function __invoke(Request $request)
         });
 
         return Response::make($response['body'], 200, [
+            'Cache-Control' => $this->edgeCacheControlHeader(),
             'Content-Type' => $response['contentType'],
+            'Vary' => 'Host',
         ]);
     }
 
+    private function edgeCacheControlHeader(): string
+    {
+        $ttl = (int) Config::get('pinkary.cache_ttl');
+
+        return "public, max-age={$ttl}, s-maxage={$ttl}";
+    }
+
     private function replacePinkaryDomainWithHostDomain(string $body, Request $request): string
     {
         $paths = [

tests/Feature/ProxyTest.php

@@ -44,6 +44,11 @@
     $testResponse->assertSee('https://pinkary.com/@kapersoft');
     $testResponse->assertDontSee('http://localhost/@kapersoft');
     $testResponse->assertHeader('Content-Type', 'text/html; charset=UTF-8');
+    $cacheControl = (string) $testResponse->headers->get('Cache-Control');
+    expect($cacheControl)->toContain('public')
+        ->and($cacheControl)->toContain('max-age=3600')
+        ->and($cacheControl)->toContain('s-maxage=3600');
+    $testResponse->assertHeader('Vary', 'Host');
     assertSame([
         'body' => $responseBody = <<<'HTML'
             <link rel="shortcut icon" href="http://localhost/img/ico.svg">
@@ -72,6 +77,11 @@
     $testResponse->assertStatus(200);
     $testResponse->assertSee('pinkary profile picture');
     $testResponse->assertHeader('Content-Type', 'image/png');
+    $cacheControl = (string) $testResponse->headers->get('Cache-Control');
+    expect($cacheControl)->toContain('public')
+        ->and($cacheControl)->toContain('max-age=3600')
+        ->and($cacheControl)->toContain('s-maxage=3600');
+    $testResponse->assertHeader('Vary', 'Host');
     assertSame([
         'body' => 'pinkary profile picture',
         'contentType' => 'image/png',