def length.with
import gralha-http-core@0.1.0.0/http.bend as Httpimport Base
379def length.with(+headers: List<&2, Header>, +body: String) -> List<&2, Header>:
380 when(List<&2, Header>, header.has(headers, "content-length"), _ => headers,
381 _ => List.append(&2, Header, headers, [Header{"Content-Length", U32.show(utf8.length(body))}]))