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<?php |
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namespace Dudlewebs\WPMCS\s3\Aws; |
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use Dudlewebs\WPMCS\s3\Aws\Signature\SignatureV4; |
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use Dudlewebs\WPMCS\s3\Aws\Endpoint\EndpointProvider; |
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use Dudlewebs\WPMCS\s3\GuzzleHttp\Psr7\Uri; |
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use Dudlewebs\WPMCS\s3\Psr\Http\Message\RequestInterface; |
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/** |
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* @internal Adds computed values to service operations that need presigned url. |
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*/ |
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class PresignUrlMiddleware |
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{ |
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private $client; |
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private $endpointProvider; |
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private $nextHandler; |
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/** @var array names of operations that require presign url */ |
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private $commandPool; |
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/** @var array query params that are not on the operation's model to add before signing */ |
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private $extraQueryParams; |
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/** @var string */ |
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private $serviceName; |
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/** @var string */ |
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private $presignParam; |
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/** @var bool */ |
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private $requireDifferentRegion; |
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public function __construct(array $options, callable $endpointProvider, AwsClientInterface $client, callable $nextHandler) |
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{ |
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$this->endpointProvider = $endpointProvider; |
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$this->client = $client; |
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$this->nextHandler = $nextHandler; |
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$this->commandPool = $options['operations']; |
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$this->serviceName = $options['service']; |
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$this->presignParam = !empty($options['presign_param']) ? $options['presign_param'] : 'PresignedUrl'; |
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$this->extraQueryParams = !empty($options['extra_query_params']) ? $options['extra_query_params'] : []; |
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$this->requireDifferentRegion = !empty($options['require_different_region']); |
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} |
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public static function wrap(AwsClientInterface $client, callable $endpointProvider, array $options = []) |
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{ |
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return function (callable $handler) use($endpointProvider, $client, $options) { |
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$f = new PresignUrlMiddleware($options, $endpointProvider, $client, $handler); |
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return $f; |
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}; |
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} |
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public function __invoke(CommandInterface $cmd, RequestInterface $request = null) |
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{ |
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if (\in_array($cmd->getName(), $this->commandPool) && !isset($cmd->{'__skip' . $cmd->getName()})) { |
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$cmd['DestinationRegion'] = $this->client->getRegion(); |
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if (!empty($cmd['SourceRegion']) && !empty($cmd[$this->presignParam])) { |
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goto nexthandler; |
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} |
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if (!$this->requireDifferentRegion || !empty($cmd['SourceRegion']) && $cmd['SourceRegion'] !== $cmd['DestinationRegion']) { |
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$cmd[$this->presignParam] = $this->createPresignedUrl($this->client, $cmd); |
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} |
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} |
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nexthandler: |
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$nextHandler = $this->nextHandler; |
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return $nextHandler($cmd, $request); |
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} |
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private function createPresignedUrl(AwsClientInterface $client, CommandInterface $cmd) |
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{ |
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$cmdName = $cmd->getName(); |
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$newCmd = $client->getCommand($cmdName, $cmd->toArray()); |
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// Avoid infinite recursion by flagging the new command. |
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$newCmd->{'__skip' . $cmdName} = \true; |
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// Serialize a request for the operation. |
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$request = \Dudlewebs\WPMCS\s3\Aws\serialize($newCmd); |
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// Create the new endpoint for the target endpoint. |
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$endpoint = EndpointProvider::resolve($this->endpointProvider, ['region' => $cmd['SourceRegion'], 'service' => $this->serviceName])['endpoint']; |
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// Set the request to hit the target endpoint. |
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$uri = $request->getUri()->withHost((new Uri($endpoint))->getHost()); |
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$request = $request->withUri($uri); |
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// Create a presigned URL for our generated request. |
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$signer = new SignatureV4($this->serviceName, $cmd['SourceRegion']); |
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$currentQueryParams = (string) $request->getBody(); |
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$paramsToAdd = \false; |
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if (!empty($this->extraQueryParams[$cmdName])) { |
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foreach ($this->extraQueryParams[$cmdName] as $param) { |
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if (!\strpos($currentQueryParams, $param)) { |
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$paramsToAdd = "&{$param}={$cmd[$param]}"; |
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} |
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} |
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} |
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return (string) $signer->presign(SignatureV4::convertPostToGet($request, $paramsToAdd ?: ""), $client->getCredentials()->wait(), '+1 hour')->getUri(); |
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} |
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} |
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