Cache Control for all S3 buckets

Question

 I have static images and users downloaded images (every hour + 100 images).

Would I be able to have Cache-Control http header for all my buckets.

I wish to have metadata for all my buckets. Please help 

Answer 1

Global metadata is something that your S3 doesnot support.

Use "put/copy" to add an exhisting object. This operation allows you to copy an object onto itself, with modified metadata, without actually downloading and re-uploading the object.

Regarding open-source solutions, there might be, but the only possible mechanism they could use would be to perform the same actions -- iterating through the bucket and updating each object's metadata via the API.