Is it possible to change headers on an S3 object without downloading the entire object?

Question

I\'ve uploaded a bunch of images to Amazon S3, and now want to add a Cache-Control header to them.

Can the header be updated without downloading the entire image? I

Answer 1

This is how you do it with AWS SDK for PHP 2:

get('s3');
// Settings
$bucketName = 'example.com';
$objectKey = 'image.jpg';
$maxAge = MONTH;
$contentType = 'image/jpeg';

try {
    $o = $s3->copyObject(array(
        'Bucket' => $bucketName,
        'Key' => $objectKey,
        'CopySource' => $bucketName . '/'. $objectKey,
        'MetadataDirective' => 'REPLACE',
        'ACL' => CannedAcl::PUBLIC_READ,
        'command.headers' => array(
            'Cache-Control' => 'public,max-age=' . $maxAge,
            'Content-Type' => $contentType
        )
    ));

    // print_r($o->ETag);
} catch (Exception $e) {
    echo $objectKey . ': ' . $e->getMessage() . PHP_EOL;
}
?>