Remove Content-Length header from automatic setting

[Xxproner]

If I should answer to HEAD method. It is not possible to prevent setting Content-Length header. MHD considers that "it is possible and allowed" (src: https://www.gnu.org/software/libmicrohttpd/manual/libmicrohttpd.html#microhttpd_002dresponse-headers). I will be grateful if you help me with it. Or add new functional to MHD. For example. MHD_USE_SUPPRESS_CONTENT_LENGTH MHD_FLAG that prevent setting the header by MHD at all or MHD_ResponseOptions - MHD_SUPPRESS_CONTENT_LENGTH - for a response. If it takes care, I can do it.Thank you)

[Xxproner]

I dived into sources and find what I wanted purely. MHD_RF_HEAD_ONLY_RESPONSE - MHD_ResponseFlags. It works. But it was not listed in releases decribtion. Thx for improving the library.

Best wishes, Xxproner

[Karlson2k]

I dived into sources and find what I wanted purely. MHD_RF_HEAD_ONLY_RESPONSE - MHD_ResponseFlags. It works. But it was not listed in releases decribtion.

That's absolutely correct. You need an empty (zero length) response to be able to set MHD_RF_HEAD_ONLY_RESPONSE. This feature was recently added to the lib and not yet documented in examples and the manual. However, it is fully documented in the doxy: https://github.com/Karlson2k/libmicrohttpd/blob/v1.0.1/src/include/microhttpd.h#L3720-L3728 https://github.com/Karlson2k/libmicrohttpd/blob/v1.0.1/src/include/microhttpd.h#L3872-L3887

You can even use a shortcut, like

response = MHD_create_response_empty(MHD_RF_HEAD_ONLY_RESPONSE);

Unfortunately, non-doxy documentation is not fully updated. I suggest using doxy in the headers for the latest information.

Thx for improving the library.

You are welcome. The best is yet to come! :)