com.google.cloud.storage.Storage: Cannot clear BlobInfo attributes on update

[RG9]

Environment details

• version: google-cloud-storage-2.40.1.jar
• Java version: 21.0.2

What I want to do using Java API and how it works currently using frontend?

I want to clear (set null) attribute Content-Disposition.

If I left empty Content-Disposition field in following form, then reading value of Blob#getContentDisposition I get null.

Javadoc says that it should be possible using update method:

Steps to reproduce

1. Execute Storage#update like this:
   

Current behavior

contentDisposition value didn't change.

Expected behavior

contentDisposition value should be cleared (set to null).

Debugging

1. Debugger says that CONTENT_DISPOSITION is modified:
   
2. In request's content there is no contentDisposition:
   

[BenWhitehead]

Thanks for raising this issue, fix implemented in #2664