fix: swagger ui provider accept html

src/Symfony/Bundle/SwaggerUi/SwaggerUiProvider.php

@@ -14,6 +14,7 @@
 namespace ApiPlatform\Symfony\Bundle\SwaggerUi;
 
 use ApiPlatform\Documentation\Documentation;
+use ApiPlatform\Documentation\Entrypoint;
 use ApiPlatform\Metadata\Error;
 use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\HttpOperation;
@@ -44,6 +45,7 @@ public function provide(Operation $operation, array $uriVariables = [], array $c
             !($operation instanceof HttpOperation)
             || !($request = $context['request'] ?? null)
             || 'html' !== $request->getRequestFormat()
+            || true === ($operation->getExtraProperties()['_api_disable_swagger_provider'] ?? false)
         ) {
             return $this->decorated->provide($operation, $uriVariables, $context);
         }
@@ -55,11 +57,12 @@ public function provide(Operation $operation, array $uriVariables = [], array $c
         // We need to call our operation provider just in case it fails
         // when it fails we'll get an Error and we'll fix the status accordingly
         // @see features/main/content_negotiation.feature:119
-        // DocumentationAction has no content negotation as well we want HTML so render swagger ui
-        if (!$operation instanceof Error && Documentation::class !== $operation->getClass()) {
+        // When requesting DocumentationAction or EntrypointAction with Accept: text/html we render SwaggerUi
+        if (!$operation instanceof Error && !\in_array($operation->getClass(), [Documentation::class, Entrypoint::class], true)) {
             $this->decorated->provide($operation, $uriVariables, $context);
         }
 
+        // This should render only when an error occured
         $swaggerUiOperation = new Get(
             class: OpenApi::class,
             processor: 'api_platform.swagger_ui.processor',
@@ -71,7 +74,6 @@ class: OpenApi::class,
 
         // save our operation
         $request->attributes->set('_api_operation', $swaggerUiOperation);
-
         $data = $this->openApiFactory->__invoke(['base_url' => $request->getBaseUrl() ?: '/']);
         $request->attributes->set('data', $data);
 

tests/Fixtures/TestBundle/ApiResource/Issue6384/AcceptHtml.php

@@ -0,0 +1,32 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Fixtures\TestBundle\ApiResource\Issue6384;
+
+use ApiPlatform\Metadata\Get;
+use Symfony\Component\HttpFoundation\Response;
+
+#[Get(
+    uriTemplate: 'accept_html',
+    provider: [self::class, 'provide'],
+    outputFormats: ['html' => ['text/html']],
+    formats: ['html' => ['text/html']],
+    extraProperties: ['_api_disable_swagger_provider' => true]
+)]
+class AcceptHtml
+{
+    public static function provide(): Response
+    {
+        return new Response('<h1>hello</h1>');
+    }
+}

tests/Functional/FormatTest.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Tests\Functional;
+
+use ApiPlatform\Symfony\Bundle\Test\ApiTestCase;
+
+final class FormatTest extends ApiTestCase
+{
+    public function testShouldReturnHtml(): void
+    {
+        $r = self::createClient()->request('GET', '/accept_html', ['headers' => ['Accept' => 'text/html']]);
+        $this->assertResponseIsSuccessful();
+        $this->assertEquals($r->getContent(), '<h1>hello</h1>');
+    }
+}