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File: application/modules/extensions/aws/Aws/Ec2/CopySnapshotMiddleware.php

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File: application/modules/extensions/aws/Aws/Ec2/CopySnapshotMiddleware.php
Role: Application script
Content type: text/plain
Description: Application script
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<?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();
    }
}