Support HEAD requests for S3Presigner

[tmccombs]

Describe the feature

S3Presigner doesn't currently seem to have any API for generating a Presigned URL for a HEAD request.

Please add a method for creating for generating such a URL.

Use Case

I want to generate a head request and a get request for downloading an object from s3. the client makes a head request to poll until the file to download is actually available.

However, there doesn't currently appear to be a way to create a pre-signed s3 request for HEAD requests using the SDK v2 (there was in V1).

Proposed Solution

The most obvious solution would be to add a presignHeadObject method to the S3Presigner class.

Another possibility would be to add a method to S3Presigner that allows you to give it any software.amazon.awssdk.services.s3.model.S3Request and generate a signed url for it. It appears that the current implementation uses a pretty generic private method anyway.

Finally, another solution could be that S3 could allow you to use a HEAD request with a signed GET request. See below.

Other Information

REFC 7231 (http/1.1) states:

The server SHOULD send the same header fields in response to a HEAD request as it would have sent if the request had been a GET

My interpretation of this is that simply changing the method of a request from a GET to a HEAD shouldn't cause a request that would return 200 to return 403 instead.

But I don't know if it is feasible for s3 to change that behavior.

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS Java SDK version used

2.20.68

JDK version used

11.0.24

Operating System and version

Ubuntu 20.04

[debora-ito]

This is a duplicate of #5276.

[github-actions]

This issue is now closed. Comments on closed issues are hard for our team to see.
If you need more assistance, please open a new issue that references this one.