KHTML_WRITE(3) Library Functions Manual KHTML_WRITE(3)

khtml_write
put content data for kcgihtml

library “libkcgihtml”

#include <sys/types.h>
#include <stdarg.h>
#include <stdint.h>
#include <kcgi.h>
#include <kcgihtml.h>

enum kcgi_err
khtml_write(const char *buf, size_t sz, void *arg);

Writes binary data buf of length sz to a context arg, a struct khtmlreq initialised with khtml_open(3) and passed as an opaque pointer. If buf is NULL or sz is zero, does nothing and returns success. All of the content is HTML escaped, for example, the left-angle bracket “<” is rendered as “&lt;”.

Returns an enum kcgi_err indicating the error state.
Success (not an error).
Internal memory allocation failure.
The output connection has been terminated. For FastCGI connections, the current connection should be released with khttp_free(3) and parse loop reentered.
The connection is still expecting headers with khttp_head(3). Indicates that khttp_body(3) did not return with success or was not invoked. For FastCGI connections, the current connection should be released with khttp_free(3) and parse loop reentered.
Internal system error writing to the output stream.

The following outputs a simple HTML page. It assumes r is a struct kreq pointer. For brevity, it does not do any error checking.
khttp_head(r, kresps[KRESP_STATUS],
  "%s", khttps[KHTTP_200]);
khttp_head(r, kresps[KRESP_CONTENT_TYPE],
  "%s", kmimetypes[KMIME_TEXT_HTML]);
khttp_body(r);
khtml_open(&req, r, 0);
khtml_elem(&req, KELEM_DOCTYPE);
khtml_elem(&req, KELEM_HTML);
khtml_elem(&req, KELEM_BODY);
khtml_elem(&req, KELEM_P);
khtml_write(&req, "Hello, world.", 13);
khtml_close(&req);

kcgihtml(3)

Written by Kristaps Dzonsons <kristaps@bsd.lv>.
March 27, 2020 OpenBSD 6.5