#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
int nng_http_res_set_reason(nng_http_res *res, const char *reason);
| This documentation is for version v1.6.0 of NNG, but the latest released version is v1.10.0. see the documentation for v1.10.0 for the most up-to-date information. | 
nng_http_res_set_reason(3http)
NAME
nng_http_res_set_reason - set HTTP response reason
SYNOPSIS
DESCRIPTION
The nng_http_res_set_reason() sets the human readable reason
associated with the response res to reason.
If the value of reason is NULL (the default), then a default reason
phrase is supplied based upon the value of the status code (see
nng_http_res_set_status()).
| The reason is never parsed automatically, but it can be a hint for humans to help them understand the nature of any erroneous result. | 
A local copy of the reason is made in the response res.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ENOMEM
 | 
 Insufficient memory to perform the operation.  | 
NNG_ENOTSUP
 | 
 No support for HTTP in the library.  |