Comment 3 for bug 1235019

I'm also looking for this functionality, thanks for providing this.

Unfortunately it didn't quite work for me. It behaves the same as Put() does when I pass a nil payload meaning that it simply uploads a new/overwritten empty file with the new ACL. If you edit the s3 package debug messaging to show the outgoing request, you can see the PUT is:

PUT /bucketName/your.file HTTP/1.1

when it looks like it should be this:

PUT /bucketName/your.file?acl HTTP/1.1

at least according to this document: http://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectPUTacl.html
(check the very last example from that docs).

When I append "?acl" to my path, it ends up getting percent encoded but I can't seem to find the spot where this happens.