Support S3 preconditions

[dogfishlizarddragondonkey]

https://docs.aws.amazon.com/AmazonS3/latest/userguide/conditional-requests.html

https://aws.amazon.com/about-aws/whats-new/2024/08/amazon-s3-conditional-writes/

Would be great if s3s could support above (e.g. PutObject failing if obj already exists and not exists precondition is specified)

[Nugine]

We already have if-none-match in PutObject defintion. Is there anything not working?

s3s/crates/s3s/src/ops/generated.rs

Line 5175 in 1c9e72c

let if_none_match: Option<IfNoneMatch> = http::parse_opt_header(req, &IF_NONE_MATCH)?;

[Nugine]

You can specify cargo git dependency to use our unpublished features.
We are preparing for the next version but still need some time.