upload_file return value

Both PutObject and CompleteMultipartUpload respond with data that includes the VersionId and ETag. [1] [2]

It would be really useful if S3Transfer.upload_file could return this response, or some part of the response.

• [1] http://boto3.readthedocs.io/en/latest/reference/services/s3.html#S3.Client.complete_multipart_upload
• [2] http://boto3.readthedocs.io/en/latest/reference/services/s3.html#S3.Client.put_object

[benmanns]

A few options I’ve thought of to work around this:

1. Use a unique key that will never be chosen again. E.g. upload to a UUID and then head that object to get the version ID.
2. Pass a unique Metadata key and value in ExtraArgs. Verify that when checking for the output version.
3. If all you care about is that all files get version IDs copied somewhere you can subscribe to the bucket’s S3 events and push file creation/update metadata to an outside data storage system.

[eode]

looks like this isn’t going anywhere. This actually destroys the viability of using s3transfer manager in any case where there could potentially be more than one version uploaded, as one can’t guarantee that the data from a subsequent ‘head’ call refers to the same file – since s3 is eventually consistent.

That’s a pretty bad breakage, rather than just a feature request.