--- title: "mg_send_head()" decl_name: "mg_send_head" symbol_kind: "func" signature: | void mg_send_head(struct mg_connection *n, int status_code, int64_t content_length, const char *extra_headers); --- Send response line and headers. This function sends response line with the `status_code`, and automatically sends one header: either "Content-Length", or "Transfer-Encoding". If `content_length` is negative, then "Transfer-Encoding: chunked" header is sent, otherwise, "Content-Length" header is sent. NOTE: If `Transfer-Encoding` is `chunked`, then message body must be sent using `mg_send_http_chunk()` or `mg_printf_http_chunk()` functions. Otherwise, `mg_send()` or `mg_printf()` must be used. Extra headers could be set through `extra_headers` - and note `extra_headers` must NOT be terminated by a new line.