Access Custom S3 Metadata After Completing Multipart Upload

Question

I'm wanting to access the custom metadata for an object uploaded via the S3 multipart upload after firing off the completeMultipartUpload method.

I initiate a multipart S3 upload with some added custom metadata like so:

$response = $this->client->createMultipartUpload([
    'Bucket'        => $this->bucket,
    'Key'           => $key,
    'ContentType'   => $type,
    'Expires'       => 60,
    'Metadata'   => [
        'file-guid' => $fileGuid,
    ],
]);

When I complete the multipart upload, I'm wanting to access the file-guid metadata and pass it along in my response.

$result = $this->client->completeMultipartUpload([
    'Bucket'          => $this->bucket,
    'Key'             => $key,
    'UploadId'        => $uploadId,
    'MultipartUpload' => [
        'Parts' => $parts,
    ],
]);

$fileGuid = $result['?'] // Couldn't find the metadata in the result.

return response()->json(['file-guid' => $fileGuid]);

I've checked the S3 object after it's been uploaded and it shows the custom metadata, but I don't see how to access it. I assumed it would be part of the completeMultipartUpload response, but I'm not seeing it.

Any help would be appreciated. Thanks!

score 0 · Answer 1 · answered Jun 23 '21 at 16:01

I found a solution, but it involves an additional request. If anyone knows of a way to access the metadata without making another request, that would be better.

$headObject = $this->client->headObject([
    'Bucket' => $this->bucket,
    'Key' => $key,
]);

Access Custom S3 Metadata After Completing Multipart Upload

1 Answers1