feat(graphql): allow to configure max query depth and max query complexity (#6880)

Co-authored-by: mauriau <m.auriau@toovalu.com>

Author: soyuka

src/GraphQl/Executor.php

@@ -18,6 +18,8 @@
 use GraphQL\Type\Schema;
 use GraphQL\Validator\DocumentValidator;
 use GraphQL\Validator\Rules\DisableIntrospection;
+use GraphQL\Validator\Rules\QueryComplexity;
+use GraphQL\Validator\Rules\QueryDepth;
 
 /**
  * Wrapper for the GraphQL facade.
@@ -26,13 +28,19 @@
  */
 final class Executor implements ExecutorInterface
 {
-    public function __construct(private readonly bool $graphQlIntrospectionEnabled = true)
+    public function __construct(private readonly bool $graphQlIntrospectionEnabled = true, private readonly int $maxQueryComplexity = 500, private readonly int $maxQueryDepth = 20)
     {
         DocumentValidator::addRule(
             new DisableIntrospection(
                 $this->graphQlIntrospectionEnabled ? DisableIntrospection::DISABLED : DisableIntrospection::ENABLED
             )
         );
+
+        $queryComplexity = new QueryComplexity($this->maxQueryComplexity);
+        DocumentValidator::addRule($queryComplexity);
+
+        $queryDepth = new QueryDepth($this->maxQueryDepth);
+        DocumentValidator::addRule($queryDepth);
     }
 
     /**

src/GraphQl/Tests/ExecutorTest.php

@@ -16,6 +16,8 @@
 use ApiPlatform\GraphQl\Executor;
 use GraphQL\Validator\DocumentValidator;
 use GraphQL\Validator\Rules\DisableIntrospection;
+use GraphQL\Validator\Rules\QueryComplexity;
+use GraphQL\Validator\Rules\QueryDepth;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -38,4 +40,20 @@ public function testDisableIntrospectionQuery(): void
         $expected = new DisableIntrospection(DisableIntrospection::ENABLED);
         $this->assertEquals($expected, DocumentValidator::getRule(DisableIntrospection::class));
     }
+
+    public function testChangeValueOfMaxQueryDepth(): void
+    {
+        $executor = new Executor(true, 20);
+
+        $expected = new QueryComplexity(20);
+        $this->assertEquals($expected, DocumentValidator::getRule(QueryComplexity::class));
+    }
+
+    public function testChangeValueOfMaxQueryComplexity(): void
+    {
+        $executor = new Executor(true, maxQueryDepth: 20);
+
+        $expected = new QueryDepth(20);
+        $this->assertEquals($expected, DocumentValidator::getRule(QueryDepth::class));
+    }
 }

src/Laravel/ApiPlatformProvider.php

@@ -1294,7 +1294,7 @@ private function registerGraphQl(Application $app): void
             /** @var ConfigRepository */
             $config = $app['config'];
 
-            return new Executor($config->get('api-platform.graphql.introspection.enabled') ?? false);
+            return new Executor($config->get('api-platform.graphql.introspection.enabled') ?? false, $config->get('api-platform.graphql.max_query_complexity'), $config->get('api-platform.graphql.max_query_depth'));
         });
 
         $app->singleton(GraphiQlController::class, function (Application $app) {

src/Laravel/config/api-platform.php

@@ -62,7 +62,9 @@
     'graphql' => [
         'enabled' => false,
         'nesting_separator' => '__',
-        'introspection' => ['enabled' => true]
+        'introspection' => ['enabled' => true],
+        'max_query_complexity' => 500,
+        'max_query_depth' => 200
     ],
 
     'exception_to_status' => [

src/Symfony/Bundle/DependencyInjection/ApiPlatformExtension.php

@@ -565,14 +565,17 @@ private function registerGraphQlConfiguration(ContainerBuilder $container, array
     {
         $enabled = $this->isConfigEnabled($container, $config['graphql']);
         $graphqlIntrospectionEnabled = $enabled && $this->isConfigEnabled($container, $config['graphql']['introspection']);
-
         $graphiqlEnabled = $enabled && $this->isConfigEnabled($container, $config['graphql']['graphiql']);
         $graphqlPlayGroundEnabled = $enabled && $this->isConfigEnabled($container, $config['graphql']['graphql_playground']);
+        $maxQueryDepth = (int) $config['graphql']['max_query_depth'];
+        $maxQueryComplexity = (int) $config['graphql']['max_query_complexity'];
         if ($graphqlPlayGroundEnabled) {
             trigger_deprecation('api-platform/core', '3.1', 'GraphQL Playground is deprecated and will be removed in API Platform 4.0. Only GraphiQL will be available in the future. Set api_platform.graphql.graphql_playground to false in the configuration to remove this deprecation.');
         }
 
         $container->setParameter('api_platform.graphql.enabled', $enabled);
+        $container->setParameter('api_platform.graphql.max_query_depth', $maxQueryDepth);
+        $container->setParameter('api_platform.graphql.max_query_complexity', $maxQueryComplexity);
         $container->setParameter('api_platform.graphql.introspection.enabled', $graphqlIntrospectionEnabled);
         $container->setParameter('api_platform.graphql.graphiql.enabled', $graphiqlEnabled);
         $container->setParameter('api_platform.graphql.graphql_playground.enabled', $graphqlPlayGroundEnabled);

src/Symfony/Bundle/DependencyInjection/Configuration.php

@@ -14,7 +14,6 @@
 namespace ApiPlatform\Symfony\Bundle\DependencyInjection;
 
 use ApiPlatform\Doctrine\Common\Filter\OrderFilterInterface;
-use ApiPlatform\Elasticsearch\State\Options;
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\Exception\InvalidArgumentException;
 use ApiPlatform\Metadata\Post;
@@ -165,7 +164,7 @@ public function getConfigTreeBuilder(): TreeBuilder
         $this->addExceptionToStatusSection($rootNode);
 
         $this->addFormatSection($rootNode, 'formats', [
-            'jsonld' => ['mime_types' => ['application/ld+json']]
+            'jsonld' => ['mime_types' => ['application/ld+json']],
         ]);
         $this->addFormatSection($rootNode, 'patch_formats', [
             'json' => ['mime_types' => ['application/merge-patch+json']],
@@ -267,6 +266,10 @@ private function addGraphQlSection(ArrayNodeDefinition $rootNode): void
                         ->arrayNode('introspection')
                             ->canBeDisabled()
                         ->end()
+                        ->integerNode('max_query_depth')->defaultValue(20)
+                        ->end()
+                        ->integerNode('max_query_complexity')->defaultValue(500)
+                        ->end()
                         ->scalarNode('nesting_separator')->defaultValue('_')->info('The separator to use to filter nested fields.')->end()
                         ->arrayNode('collection')
                             ->addDefaultsIfNotSet()

src/Symfony/Bundle/Resources/config/graphql.xml

@@ -7,6 +7,8 @@
     <services>
         <service id="api_platform.graphql.executor" class="ApiPlatform\GraphQl\Executor" public="false">
             <argument>%api_platform.graphql.introspection.enabled%</argument>
+            <argument>%api_platform.graphql.max_query_complexity%</argument>
+            <argument>%api_platform.graphql.max_query_depth%</argument>
         </service>
 
         <!-- Resolvers -->

tests/Fixtures/app/AppKernel.php

@@ -251,6 +251,7 @@ class_exists(NativePasswordHasher::class) ? 'password_hashers' : 'encoders' => [
             ],
             'graphql' => [
                 'graphql_playground' => false,
+                'max_query_depth' => 200,
             ],
             'use_symfony_listeners' => $useSymfonyListeners,
             'defaults' => [

tests/Symfony/Bundle/DependencyInjection/ConfigurationTest.php

@@ -123,6 +123,8 @@ private function runDefaultConfigTests(array $doctrineIntegrationsToLoad = ['orm
                 'introspection' => [
                     'enabled' => true,
                 ],
+                'max_query_depth' => 20,
+                'max_query_complexity' => 500,
                 'nesting_separator' => '_',
                 'collection' => [
                     'pagination' => [