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<?php |
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namespace Dudlewebs\WPMCS\s3\Aws; |
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|
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use Dudlewebs\WPMCS\s3\Aws\Api\Service; |
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use Dudlewebs\WPMCS\s3\Psr\Http\Message\RequestInterface; |
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use Dudlewebs\WPMCS\s3\Psr\Log\InvalidArgumentException; |
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/** |
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* Used to update the host based on a modeled endpoint trait |
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* |
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* IMPORTANT: this middleware must be added after the "build" step. |
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* |
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* @internal |
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*/ |
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class EndpointParameterMiddleware |
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{ |
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/** @var callable */ |
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private $nextHandler; |
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/** @var Service */ |
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private $service; |
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/** |
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* Create a middleware wrapper function |
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* |
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* @param Service $service |
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* @param array $args |
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* @return \Closure |
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*/ |
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public static function wrap(Service $service) |
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{ |
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return function (callable $handler) use($service) { |
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return new self($handler, $service); |
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}; |
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} |
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public function __construct(callable $nextHandler, Service $service) |
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{ |
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$this->nextHandler = $nextHandler; |
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$this->service = $service; |
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} |
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public function __invoke(CommandInterface $command, RequestInterface $request) |
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{ |
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$nextHandler = $this->nextHandler; |
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$operation = $this->service->getOperation($command->getName()); |
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if (!empty($operation['endpoint']['hostPrefix'])) { |
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$prefix = $operation['endpoint']['hostPrefix']; |
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// Captures endpoint parameters stored in the modeled host. |
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// These are denoted by enclosure in braces, i.e. '{param}' |
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\preg_match_all("/\\{([a-zA-Z0-9]+)}/", $prefix, $parameters); |
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if (!empty($parameters[1])) { |
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// Captured parameters without braces stored in $parameters[1], |
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// which should correspond to members in the Command object |
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foreach ($parameters[1] as $index => $parameter) { |
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if (empty($command[$parameter])) { |
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throw new \InvalidArgumentException("The parameter '{$parameter}' must be set and not empty."); |
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} |
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// Captured parameters with braces stored in $parameters[0], |
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// which are replaced by their corresponding Command value |
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$prefix = \str_replace($parameters[0][$index], $command[$parameter], $prefix); |
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} |
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} |
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$uri = $request->getUri(); |
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$host = $prefix . $uri->getHost(); |
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if (!\Dudlewebs\WPMCS\s3\Aws\is_valid_hostname($host)) { |
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throw new \InvalidArgumentException("The supplied parameters result in an invalid hostname: '{$host}'."); |
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} |
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$request = $request->withUri($uri->withHost($host)); |
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} |
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return $nextHandler($command, $request); |
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} |
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} |
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