T-E chunked trailers

Hi All,

rfc7230#section-4.4 talks about the Trailer header for Chunked T-E.

I need some clarity on expected behavior from server,

When a User-Agent sends a POST request with Chunked body and includes a
Trailer header (say with value content-md5) in the request headers, but
doesn't include any trailers after the zero chunk in the POST body.

Should this be an error or can this be ignored?

Since none of the mandatory headers can be present, I feel that this can be
ignored,

But on the other hand, content-md5 not getting generated could be some
middle box modifying the content and stripping off the trailer?


Thanks in advance,
Ashok