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File: application/modules/extensions/aws/Aws/Api/Parser/Crc32ValidatingParser.php

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File: application/modules/extensions/aws/Aws/Api/Parser/Crc32ValidatingParser.php
Role: Application script
Content type: text/plain
Description: Application script
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<?php
namespace Aws\Api\Parser;

use
Aws\CommandInterface;
use
Aws\Exception\AwsException;
use
Psr\Http\Message\ResponseInterface;
use
GuzzleHttp\Psr7;

/**
 * @internal Decorates a parser and validates the x-amz-crc32 header.
 */
class Crc32ValidatingParser extends AbstractParser
{
   
/** @var callable */
   
private $parser;

   
/**
     * @param callable $parser Parser to wrap.
     */
   
public function __construct(callable $parser)
    {
       
$this->parser = $parser;
    }

    public function
__invoke(
       
CommandInterface $command,
       
ResponseInterface $response
   
) {
        if (
$expected = $response->getHeaderLine('x-amz-crc32')) {
           
$hash = hexdec(Psr7\hash($response->getBody(), 'crc32b'));
            if (
$expected != $hash) {
                throw new
AwsException(
                   
"crc32 mismatch. Expected {$expected}, found {$hash}.",
                   
$command,
                    [
                       
'code' => 'ClientChecksumMismatch',
                       
'connection_error' => true,
                       
'response' => $response
                   
]
                );
            }
        }

       
$fn = $this->parser;
        return
$fn($command, $response);
    }
}