According to the Rage-Request RFC - https://www.rfc-editor.org/rfc/rfc9110.html#section-13.1.1-2

• An origin server MUST use the strong comparison function when comparing entity tags for If-Match

But when returning the `RangeResponseResult` we skip checking for weak tags in the check `ifRange.charAt(0) == '"'` -

• https://github.com/undertow-io/undertow/blob/6a4985f46f0a2d05aa8479578112f11fef55c4a8/core/src/main/java/io/undertow/util/ByteRange.java#L135-L137

A If-Range header can be something like - `W/"TAG"` which would skip the check `ifRange.charAt(0) == '"'` and mark it as a valid If-Range match.