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05/19/2025 10:07:17 AM
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AuthSchemeResolver.php
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AuthSchemeResolverInterface.php
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AuthSelectionMiddleware.php
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05/19/2025 10:07:16 AM
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Editing: AuthSelectionMiddleware.php
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<?php namespace Aws\Auth; use Aws\Api\Service; use Aws\CommandInterface; use Closure; use GuzzleHttp\Promise\Promise; /** * Handles auth scheme resolution. If a service models and auth scheme using * the `auth` trait and the operation or metadata levels, this middleware will * attempt to select the first compatible auth scheme it encounters and apply its * signature version to the command's `@context` property bag. * * IMPORTANT: this middleware must be added to the "build" step. * * @internal */ class AuthSelectionMiddleware { /** @var callable */ private $nextHandler; /** @var AuthSchemeResolverInterface */ private $authResolver; /** @var Service */ private $api; /** * Create a middleware wrapper function * * @param AuthSchemeResolverInterface $authResolver * @param Service $api * @return Closure */ public static function wrap( AuthSchemeResolverInterface $authResolver, Service $api ): Closure { return function (callable $handler) use ($authResolver, $api) { return new self($handler, $authResolver, $api); }; } /** * @param callable $nextHandler * @param $authResolver * @param callable $identityProvider * @param Service $api */ public function __construct( callable $nextHandler, AuthSchemeResolverInterface $authResolver, Service $api ) { $this->nextHandler = $nextHandler; $this->authResolver = $authResolver; $this->api = $api; } /** * @param CommandInterface $command * * @return Promise */ public function __invoke(CommandInterface $command) { $nextHandler = $this->nextHandler; $serviceAuth = $this->api->getMetadata('auth') ?: []; $operation = $this->api->getOperation($command->getName()); $operationAuth = $operation['auth'] ?? []; $unsignedPayload = $operation['unsignedpayload'] ?? false; $resolvableAuth = $operationAuth ?: $serviceAuth; if (!empty($resolvableAuth)) { if (isset($command['@context']['auth_scheme_resolver']) && $command['@context']['auth_scheme_resolver'] instanceof AuthSchemeResolverInterface ){ $resolver = $command['@context']['auth_scheme_resolver']; } else { $resolver = $this->authResolver; } $selectedAuthScheme = $resolver->selectAuthScheme( $resolvableAuth, ['unsigned_payload' => $unsignedPayload] ); if (!empty($selectedAuthScheme)) { $command['@context']['signature_version'] = $selectedAuthScheme; } } return $nextHandler($command); } }