When candidate/primary/secondary return a content length of 0, Diffy returns empty 200

[craigta]

I'm seeing an empty 200 when downstream services are returning 401, which I also see reflected in the otel trace output. I'm also seeing that all my headers from the downstream services are dropped on the response in these cases as well

[craigta]

Looking into this more, it is actually caused when the downstream services return an empty body aka content-length of 0. It looks like Diffy is returning a default set. Instead, Diffy should do the header comparison and return the primary HTTP status

[jeffy-ifit]

Any resolution on this or is there a setting I can toggle? I believe I'm seeing the same thing when both primary and candidate are returning 204 with no body and diffy is instead returning 200

It seems this is caused primarily by the primary returning an empty body.