KJSON_PUTNULL(3)

NAME
kjson_putnull, kjson_putnullp - put null content for kcgijson

LIBRARY
libkcgijson

SYNOPSIS
#include <sys/types.h>
#include <stdarg.h>
#include <stdint.h>
#include <kcgi.h>
#include <kcgijson.h>
enum kcgi_err
kjson_putnull(struct kjsonreq *req);
enum kcgi_err
kjson_putnullp(struct kjsonreq *req, const char *name);

DESCRIPTION
Write a null to a context req initialised with khtml_open(3).

The kjson_putnull() form is for array scopes and kjson_putnullp() for objects.

Passing a NULL value to name for kjson_putnullp(), is equivalent to calling kjson_putnull().

RETURN VALUES
Returns an enum kcgi_err indicating the error state.

KCGI_OK
    Success (not an error).

KCGI_ENOMEM
    Internal memory allocation failure.

KCGI_HUP
    The output connection has been terminated. For FastCGI connections, the current connection should be released with khttp_free(3) and parse loop reentered.

KCGI_FORM
    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.

KCGI_SYSTEM
    Internal system error writing to the output stream.

KCGI_WRITER
    The incorrect form was used for the current scope, for example, an array-type write within an object.

EXAMPLES
The following outputs a simple JSON document. 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_APP_JSON]);
    khttp_body(r);
    kjson_open(&req, r);
    kjson_obj_open(&req);
    kjson_putnullp(&req, "bar");
    kjson_close(&req);

SEE ALSO
kcgijson(3)

AUTHORS
Written by Kristaps Dzonsons <kristaps@bsd.lv>.