I have a problem with ETag response headers being inconsistent, or to be more specific, not present. Currently, I am using Google Cloud CDN to deliver the resources from Google Cloud Storage (bucket). When the resource is read directly from the bucket, the ETag is present, however, if the resource is obtained through the CDN the ETag is missing.

I have a problem with ETag response headers being inconsistent, or to be more specific, not present. I have a resource that was added to the bucket before the switch from HTTP to HTTPS was made and that resource has the ETag response header. However, after the switch from HTTP to HTTPS, none of the resources that are being added to the bucket have that ETag header included.