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LaurentHuzardLaurentHuzard
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feat(state): added "Accept-Post" and "Allow" headers
To ensure compliance with the LDP specification (https://www.w3.org/TR/ldp/): Added the "Accept-Post" header containing the list of supported Post formats. Added the "Allow" header with values based on the allowed operations on the queried resources.
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8 files changed

+423
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‎src/Laravel/ApiPlatformProvider.php‎

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@@ -146,6 +146,7 @@
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use ApiPlatform\State\Pagination\Pagination;
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use ApiPlatform\State\Pagination\PaginationOptions;
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use ApiPlatform\State\Processor\AddLinkHeaderProcessor;
149+
use ApiPlatform\State\Processor\LinkedDataPlatformProcessor;
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use ApiPlatform\State\Processor\RespondProcessor;
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use ApiPlatform\State\Processor\SerializeProcessor;
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use ApiPlatform\State\Processor\WriteProcessor;
@@ -424,6 +425,14 @@ public function register(): void
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return new AddLinkHeaderProcessor($decorated, new HttpHeaderSerializer());
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});
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428+
$this->app->singleton(LinkedDataPlatformProcessor::class, function (Application $app) {
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return new LinkedDataPlatformProcessor(
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$app->make(AddLinkHeaderProcessor::class), // Original service
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$app->make(ResourceClassResolverInterface::class),
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$app->make(ResourceMetadataCollectionFactoryInterface::class)
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);
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});
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$this->app->singleton(SerializeProcessor::class, function (Application $app) {
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return new SerializeProcessor($app->make(RespondProcessor::class), $app->make(Serializer::class), $app->make(SerializerContextBuilderInterface::class));
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});

‎src/State/Processor/LinkedDataPlatformProcessor.php‎

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<?php
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/*
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* This file is part of the API Platform project.
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*
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* (c) Kévin Dunglas <dunglas@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace ApiPlatform\State\Processor;
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use ApiPlatform\Metadata\Error;
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use ApiPlatform\Metadata\HttpOperation;
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use ApiPlatform\Metadata\Operation;
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use ApiPlatform\Metadata\Resource\Factory\ResourceMetadataCollectionFactoryInterface;
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use ApiPlatform\Metadata\ResourceClassResolverInterface;
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use ApiPlatform\State\ProcessorInterface;
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use Symfony\Component\HttpFoundation\Response;
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/**
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* @template T1
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* @template T2
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*
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* @implements ProcessorInterface<T1, T2>
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*/
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final class LinkedDataPlatformProcessor implements ProcessorInterface
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{
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private const DEFAULT_ALLOWED_METHODS = ['OPTIONS', 'HEAD'];
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/**
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* @param ProcessorInterface<T1, T2> $decorated
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*/
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public function __construct(
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private readonly ProcessorInterface $decorated,
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private readonly ResourceClassResolverInterface $resourceClassResolver,
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private readonly ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory,
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) {
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}
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public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): mixed
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{
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$response = $this->decorated->process($data, $operation, $uriVariables, $context);
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if (
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!$response instanceof Response
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|| !$operation instanceof HttpOperation
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|| $operation instanceof Error
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|| !$operation->getUriTemplate()
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|| !$this->resourceClassResolver->isResourceClass($operation->getClass())
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) {
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return $response;
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}
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$acceptPost = null;
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$allowedMethods = self::DEFAULT_ALLOWED_METHODS;
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$resourceCollection = $this->resourceMetadataCollectionFactory->create($operation->getClass());
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foreach ($resourceCollection as $resource) {
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foreach ($resource->getOperations() as $op) {
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if ($op->getUriTemplate() === $operation->getUriTemplate()) {
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$allowedMethods[] = $method = $op->getMethod();
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if ('POST' === $method && \is_array($outputFormats = $op->getOutputFormats())) {
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$acceptPost = implode(', ', array_merge(...array_values($outputFormats)));
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}
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}
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}
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}
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if ($acceptPost) {
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$response->headers->set('Accept-Post', $acceptPost);
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}
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$response->headers->set('Allow', implode(', ', $allowedMethods));
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return $response;
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}
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}

‎src/State/Tests/Fixtures/ApiResource/Dummy.php‎

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<?php
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/*
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* This file is part of the API Platform project.
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*
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* (c) Kévin Dunglas <dunglas@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace ApiPlatform\State\Tests\Fixtures\ApiResource;
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use ApiPlatform\Metadata\ApiResource;
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#[ApiResource()]
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class Dummy
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{
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public int $id;
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}

‎src/State/Tests/Processor/LinkedDataPlatformProcessorTest.php‎

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<?php
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/*
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* This file is part of the API Platform project.
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*
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* (c) Kévin Dunglas <dunglas@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace ApiPlatform\State\Tests\Processor;
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use ApiPlatform\Hal\Tests\Fixtures\Dummy;
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use ApiPlatform\Metadata\ApiResource;
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use ApiPlatform\Metadata\Delete;
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use ApiPlatform\Metadata\Error;
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use ApiPlatform\Metadata\Get;
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use ApiPlatform\Metadata\GetCollection;
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use ApiPlatform\Metadata\Post;
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use ApiPlatform\Metadata\Put;
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use ApiPlatform\Metadata\Resource\Factory\ResourceMetadataCollectionFactoryInterface;
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use ApiPlatform\Metadata\Resource\ResourceMetadataCollection;
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use ApiPlatform\Metadata\ResourceClassResolverInterface;
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use ApiPlatform\State\Processor\LinkedDataPlatformProcessor;
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use ApiPlatform\State\ProcessorInterface;
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use PHPUnit\Framework\MockObject\MockObject;
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use PHPUnit\Framework\TestCase;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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class LinkedDataPlatformProcessorTest extends TestCase
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{
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private ResourceMetadataCollectionFactoryInterface&MockObject $resourceMetadataCollectionFactory;
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private ResourceClassResolverInterface&MockObject $resourceClassResolver;
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private ProcessorInterface&MockObject $decorated;
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protected function setUp(): void
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{
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$this->resourceClassResolver = $this->createMock(ResourceClassResolverInterface::class);
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$this->resourceClassResolver
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->method('isResourceClass')
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->willReturn(true);
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$this->resourceMetadataCollectionFactory = $this->createMock(ResourceMetadataCollectionFactoryInterface::class);
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$this->resourceMetadataCollectionFactory
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->method('create')
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->willReturn(
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new ResourceMetadataCollection(Dummy::class, [
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new ApiResource(operations: [
55+
new Get(uriTemplate: '/dummy/{dummyResourceId}{._format}', class: Dummy::class, name: 'get'),
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new GetCollection(uriTemplate: '/dummy{._format}', class: Dummy::class, name: 'get_collections'),
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new Post(uriTemplate: '/dummy{._format}', outputFormats: ['jsonld' => ['application/ld+json'], 'text/turtle' => ['text/turtle']], class: Dummy::class, name: 'post'),
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new Delete(uriTemplate: '/dummy/{dummyResourceId}{._format}', class: Dummy::class, name: 'delete'),
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new Put(uriTemplate: '/dummy/{dummyResourceId}{._format}', class: Dummy::class, name: 'put'),
60+
]),
61+
])
62+
);
63+
64+
$this->decorated = $this->createMock(ProcessorInterface::class);
65+
$this->decorated->method('process')->willReturn(new Response());
66+
}
67+
68+
public function testHeadersAcceptPostIsReturnWhenPostAllowed(): void
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{
70+
$operation = new Get('/dummy{._format}', class: Dummy::class);
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72+
$context = $this->getContext();
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74+
$processor = new LinkedDataPlatformProcessor(
75+
$this->decorated,
76+
$this->resourceClassResolver,
77+
$this->resourceMetadataCollectionFactory
78+
);
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/** @var Response $response */
80+
$response = $processor->process(null, $operation, [], $context);
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$this->assertSame('application/ld+json, text/turtle', $response->headers->get('Accept-Post'));
83+
}
84+
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public function testHeadersAcceptPostIsNotSetWhenPostIsNotAllowed(): void
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{
87+
$operation = new Get('/dummy/{dummyResourceId}{._format}', class: Dummy::class);
88+
$context = $this->getContext();
89+
90+
$processor = new LinkedDataPlatformProcessor(
91+
$this->decorated,
92+
$this->resourceClassResolver,
93+
$this->resourceMetadataCollectionFactory
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);
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/** @var Response $response */
96+
$response = $processor->process(null, $operation, [], $context);
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$this->assertNull($response->headers->get('Accept-Post'));
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}
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public function testHeaderAllowReflectsResourceAllowedMethods(): void
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{
103+
$operation = new Get('/dummy{._format}', class: Dummy::class);
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$context = $this->getContext();
105+
106+
$processor = new LinkedDataPlatformProcessor(
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$this->decorated,
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$this->resourceClassResolver,
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$this->resourceMetadataCollectionFactory
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);
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/** @var Response $response */
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$response = $processor->process(null, $operation, [], $context);
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$allowHeader = $response->headers->get('Allow');
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$this->assertStringContainsString('OPTIONS', $allowHeader);
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$this->assertStringContainsString('HEAD', $allowHeader);
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$this->assertStringContainsString('GET', $allowHeader);
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$this->assertStringContainsString('POST', $allowHeader);
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$operation = new Get('/dummy/{dummyResourceId}{._format}', class: Dummy::class);
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/** @var Response $response */
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$processor = new LinkedDataPlatformProcessor(
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$this->decorated,
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$this->resourceClassResolver,
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$this->resourceMetadataCollectionFactory
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);
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/** @var Response $response */
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$response = $processor->process('data', $operation, [], $this->getContext());
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$allowHeader = $response->headers->get('Allow');
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$this->assertStringContainsString('OPTIONS', $allowHeader);
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$this->assertStringContainsString('HEAD', $allowHeader);
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$this->assertStringContainsString('GET', $allowHeader);
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$this->assertStringContainsString('PUT', $allowHeader);
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$this->assertStringContainsString('DELETE', $allowHeader);
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}
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public function testProcessorWithoutRequiredConditionReturnOriginalResponse(): void
137+
{
138+
// Operation is an Error
139+
$processor = new LinkedDataPlatformProcessor($this->decorated, $this->resourceClassResolver, $this->resourceMetadataCollectionFactory);
140+
$response = $processor->process(null, new Error(), $this->getContext());
141+
$this->assertNull($response->headers->get('Allow'));
142+
}
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private function createGetRequest(): Request
145+
{
146+
$request = new Request();
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$request->setMethod('GET');
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$request->setRequestFormat('json');
149+
$request->headers->set('Accept', 'application/ld+json');
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151+
return $request;
152+
}
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private function getContext(): array
155+
{
156+
return [
157+
'resource_class' => Dummy::class,
158+
'request' => $this->createGetRequest(),
159+
];
160+
}
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}

‎src/Symfony/Bundle/Resources/config/state/processor.xml‎

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@@ -26,5 +26,11 @@
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<service id="api_platform.state_processor.add_link_header" class="ApiPlatform\State\Processor\AddLinkHeaderProcessor" decorates="api_platform.state_processor.respond">
2727
<argument type="service" id="api_platform.state_processor.add_link_header.inner" />
2828
</service>
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<service id="api_platform.state_processor.linked_data_platform" class="ApiPlatform\State\Processor\LinkedDataPlatformProcessor" decorates="api_platform.state_processor.respond">
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<argument type="service" id="api_platform.state_processor.linked_data_platform.inner" />
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<argument type="service" id="api_platform.resource_class_resolver" />
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<argument type="service" id="api_platform.metadata.resource.metadata_collection_factory" />
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</service>
2935
</services>
3036
</container>

‎src/Symfony/Bundle/Resources/config/symfony/events.xml‎

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7373
<argument type="service" id="api_platform.state_processor.add_link_header.inner" />
7474
</service>
7575

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<service id="api_platform.state_processor.linked_data_platform" class="ApiPlatform\State\Processor\LinkedDataPlatformProcessor" decorates="api_platform.state_processor.respond">
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<argument type="service" id="api_platform.state_processor.linked_data_platform.inner" />
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<argument type="service" id="api_platform.resource_class_resolver" />
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<argument type="service" id="api_platform.metadata.resource.metadata_collection_factory" />
80+
</service>
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7682
<service id="api_platform.listener.view.write" class="ApiPlatform\Symfony\EventListener\WriteListener">
7783
<argument type="service" id="api_platform.state_processor.write" />
7884
<argument type="service" id="api_platform.metadata.resource.metadata_collection_factory" />

‎tests/Fixtures/TestBundle/ApiResource/DummyGetPostDeleteOperation.php‎

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<?php
2+
3+
/*
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* This file is part of the API Platform project.
5+
*
6+
* (c) Kévin Dunglas <dunglas@gmail.com>
7+
*
8+
* For the full copyright and license information, please view the LICENSE
9+
* file that was distributed with this source code.
10+
*/
11+
12+
declare(strict_types=1);
13+
14+
namespace ApiPlatform\Tests\Fixtures\TestBundle\ApiResource;
15+
16+
use ApiPlatform\Metadata\ApiResource;
17+
use ApiPlatform\Metadata\Delete;
18+
use ApiPlatform\Metadata\Get;
19+
use ApiPlatform\Metadata\GetCollection;
20+
use ApiPlatform\Metadata\Operation;
21+
use ApiPlatform\Metadata\Post;
22+
23+
#[ApiResource(operations: [
24+
new Get(
25+
uriTemplate: '/dummy_get_post_delete_operations/{id}',
26+
provider: [self::class, 'provideItem'],
27+
),
28+
new GetCollection(
29+
uriTemplate: '/dummy_get_post_delete_operations',
30+
provider: [self::class, 'provide'], ),
31+
new Post(
32+
uriTemplate: '/dummy_get_post_delete_operations',
33+
provider: [self::class, 'provide'], ),
34+
new Delete(
35+
uriTemplate: '/dummy_get_post_delete_operations/{id}',
36+
provider: [self::class, 'provideItem'], ),
37+
])]
38+
class DummyGetPostDeleteOperation
39+
{
40+
public ?int $id;
41+
42+
public ?string $name = null;
43+
44+
public static function provide(Operation $operation, array $uriVariables = [], array $context = []): array
45+
{
46+
$dummyResource = new self();
47+
$dummyResource->id = 1;
48+
$dummyResource->name = 'Dummy name';
49+
50+
return [
51+
$dummyResource,
52+
];
53+
}
54+
55+
public static function provideItem(Operation $operation, array $uriVariables = [], array $context = []): self
56+
{
57+
$dummyResource = new self();
58+
$dummyResource->id = $uriVariables['id'];
59+
$dummyResource->name = 'Dummy name';
60+
61+
return $dummyResource;
62+
}
63+
}

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