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[Server] Refactor protocol pipeline to separate request and notification handling (#106)

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Kyrian Obikwelu 2025-10-12 13:53:41 +01:00 • committed by GitHub
commit 54a5d1495c
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1 changed files with 1843 additions and 719 deletions
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23
src/Server/Handler/Request/ReadResourceHandler.php
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@ -16,11 +16,10 @@ use Mcp\Capability\Registry\ReferenceProviderInterface;
use Mcp\Capability\Registry\ResourceTemplateReference;
use Mcp\Exception\ResourceNotFoundException;
use Mcp\Schema\JsonRpc\Error;
use Mcp\Schema\JsonRpc\HasMethodInterface;
use Mcp\Schema\JsonRpc\Request;
use Mcp\Schema\JsonRpc\Response;
use Mcp\Schema\Request\ReadResourceRequest;
use Mcp\Schema\Result\ReadResourceResult;
use Mcp\Server\Handler\MethodHandlerInterface;
use Mcp\Server\Session\SessionInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
@ -28,7 +27,7 @@ use Psr\Log\NullLogger;
/**
* @author Tobias Nyholm <tobias.nyholm@gmail.com>
*/
final class ReadResourceHandler implements MethodHandlerInterface
final class ReadResourceHandler implements RequestHandlerInterface
{
public function __construct(
private readonly ReferenceProviderInterface $referenceProvider,
@ -37,23 +36,23 @@ final class ReadResourceHandler implements MethodHandlerInterface
) {
}
public function supports(HasMethodInterface $message): bool
public function supports(Request $request): bool
{
return $message instanceof ReadResourceRequest;
return $request instanceof ReadResourceRequest;
}
public function handle(ReadResourceRequest|HasMethodInterface $message, SessionInterface $session): Response|Error
public function handle(Request $request, SessionInterface $session): Response|Error
{
\assert($message instanceof ReadResourceRequest);
\assert($request instanceof ReadResourceRequest);
$uri = $message->uri;
$uri = $request->uri;
$this->logger->debug('Reading resource', ['uri' => $uri]);
try {
$reference = $this->referenceProvider->getResource($uri);
if (null === $reference) {
throw new ResourceNotFoundException($message);
throw new ResourceNotFoundException($request);
}
$result = $this->referenceHandler->handle($reference, ['uri' => $uri]);
@ -64,15 +63,15 @@ final class ReadResourceHandler implements MethodHandlerInterface
$formatted = $reference->formatResult($result, $uri, $reference->schema->mimeType);
}
return new Response($message->getId(), new ReadResourceResult($formatted));
return new Response($request->getId(), new ReadResourceResult($formatted));
} catch (ResourceNotFoundException $e) {
$this->logger->error('Resource not found', ['uri' => $uri]);
return new Error($message->getId(), Error::RESOURCE_NOT_FOUND, $e->getMessage());
return new Error($request->getId(), Error::RESOURCE_NOT_FOUND, $e->getMessage());
} catch (\Throwable $e) {
$this->logger->error(\sprintf('Error while reading resource "%s": "%s".', $uri, $e->getMessage()));
return Error::forInternalError('Error while reading resource', $message->getId());
return Error::forInternalError('Error while reading resource', $request->getId());
}
}
}