withCompression would overwrite Vary header with Accept-Encoding and discard the value set by the handler. This PR adjusts the behavior: if the Vary header was set to * (i.e. no caching allowed), * it will remain it's value, otherwise, we will add Accept-Encoding to the list.
withCompressionwould overwriteVaryheader withAccept-Encodingand discard the value set by the handler. This PR adjusts the behavior: if theVaryheader was set to*(i.e. no caching allowed),*it will remain it's value, otherwise, we will addAccept-Encodingto the list.