| 
<?phpnamespace Aws\Exception;
 
 class CouldNotCreateChecksumException extends \RuntimeException
 {
 public function __construct($algorithm, \Exception $previous = null)
 {
 $prefix = $algorithm === 'md5' ? "An" : "A";
 parent::__construct("{$prefix} {$algorithm} checksum could not be "
 . "calculated for the provided upload body, because it was not "
 . "seekable. To prevent this error you can either 1) include the "
 . "ContentMD5 or ContentSHA256 parameters with your request, 2) "
 . "use a seekable stream for the body, or 3) wrap the non-seekable "
 . "stream in a GuzzleHttp\\Psr7\\CachingStream object. You "
 . "should be careful though and remember that the CachingStream "
 . "utilizes PHP temp streams. This means that the stream will be "
 . "temporarily stored on the local disk.", 0, $previous);
 }
 }
 
 |