Hello, We have a use case where content-length needs to be set in the response headers for a HEAD request. See for example:- https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadObject.html#API_HeadObject_Examples
According to rfc-9110 section 8.6.6 <https://www.rfc-editor.org/rfc/rfc9110.html#section-8.6-6> this is valid behaviour A server MAY send a Content-Length header field in a response to a HEAD request (Section 9.3.2 <https://www.rfc-editor.org/rfc/rfc9110.html#HEAD>); a server MUST NOT send Content-Length in such a response unless its field value equals the decimal number of octets that would have been sent in the content of a response if the same request had used the GET method. But from what I gathered here <https://lists.nongnu.org/archive/html/libmicrohttpd/2019-10/msg00037.html>, I can set MHD_RF_INSANITY_HEADER_CONTENT_LENGTH to allow this behaviour. For HEAD requests, I suspect libmicrohttpd is always setting content-length to 0. So for example when i set content-length to 24 manually I am getting this. < HTTP/1.1 200 OK < Date: Sun, 05 Nov 2023 16:10:44 GMT < Connection: close < Last-Modified: Thu, 26 Oct 2023 04:42:56 GMT < Content-Length: 24 < Content-Length: 0 I suspect the extra content-length is being set by mhd. But as per rfc I should be able to set content-length manually for a head request. Thank you
