Implement list objects v2

[gaul]

Breaks marker into continuation-token and start-after and adds fetch-owner option. Reference:

https://docs.aws.amazon.com/AmazonS3/latest/API/v2-RESTBucketGET.html

[Pluto1010]

I would also be happy to this feature. I'm trying to enable my QNAP NAS to backup my data to B2 instead of Microsoft's Azure through s3proxy. I've tried accessing the storage through s3proxy using Cyberduck and learned that listing is not supported yet.

Can I help to do this?

I've also contacted QNAP support to add B2 support directly but it seemed that after a few mails they didn't even understand what I want. Instead of that they asked me what version of their backup tool I've installed on the NAS. Even their latest beta release does not support B2.

[gaul]

@Pluto1010 Strange that Cyberduck does not fallback to list objects v1 when v2 emits NotImplemented; you should also follow up with its authors. I believe adding support for v2 is straightforward; S3Proxy has a limited notion of owner so simply fake that but you need to investigate the difference between marker and start-after. My intuition is that you just replace one with the other but this may have more subtlety.

[jumenzel]

It would be great to add list objects v2 support to s3proxy. It appears though that jclouds does not support the continuation-token or know how to call s3 using the list-type=2 query parameter. So even if s3proxy supported list objects v2 it wouldn't really help. But I'm also new to this so maybe I've drawn the wrong conclusion. Any ideas?

[gaul]

Sorry for my tardy response; I was traveling for several weeks. It looks like you implemented this in vyasa-analytics/s3proxy#1; could you submit a pull request here?