<?php
namespace Aws\Ec2;
use Aws\AwsClientInterface;
use Aws\Signature\SignatureV4;
use Aws\Endpoint\EndpointProvider;
use Aws\CommandInterface;
use GuzzleHttp\Psr7\Uri;
use Psr\Http\Message\RequestInterface;
/**
* @internal Adds computed values to the CopySnapshot operation.
*/
class CopySnapshotMiddleware
{
private $client;
private $endpointProvider;
private $nextHandler;
public static function wrap(AwsClientInterface $client, callable $endpointProvider)
{
return function (callable $handler) use ($endpointProvider, $client) {
$f = new CopySnapshotMiddleware($endpointProvider, $client, $handler);
return $f;
};
}
public function __construct(
callable $endpointProvider,
AwsClientInterface $client,
callable $nextHandler
) {
$this->endpointProvider = $endpointProvider;
$this->client = $client;
$this->nextHandler = $nextHandler;
}
public function __invoke(CommandInterface $cmd, RequestInterface $request = null)
{
if ($cmd->getName() == 'CopySnapshot'
&& (!isset($cmd->__skipCopySnapshot))
) {
$cmd['PresignedUrl'] = $this->createPresignedUrl($this->client, $cmd);
$cmd['DestinationRegion'] = $this->client->getRegion();
}
$f = $this->nextHandler;
return $f($cmd, $request);
}
private function createPresignedUrl(
AwsClientInterface $client,
CommandInterface $cmd
) {
$newCmd = $client->getCommand('CopySnapshot', $cmd->toArray());
// Avoid infinite recursion by flagging the new command.
$newCmd->__skipCopySnapshot = true;
// Serialize a request for the CopySnapshot operation.
$request = \Aws\serialize($newCmd);
// Create the new endpoint for the target endpoint.
$endpoint = EndpointProvider::resolve($this->endpointProvider, [
'region' => $cmd['SourceRegion'],
'service' => 'ec2'
])['endpoint'];
// Set the request to hit the target endpoint.
$uri = $request->getUri()->withHost((new Uri($endpoint))->getHost());
$request = $request->withUri($uri);
// Create a presigned URL for our generated request.
$signer = new SignatureV4('ec2', $cmd['SourceRegion']);
return (string) $signer->presign(
SignatureV4::convertPostToGet($request),
$client->getCredentials()->wait(),
'+1 hour'
)->getUri();
}
}
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