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= nng_http_res_set_reason(3http)
//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This document is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
== NAME
nng_http_res_set_reason - set HTTP response reason
== SYNOPSIS
[source, c]
----
#include <nng/nng.h>
#include <nng/supplemental/http/http.h>
int nng_http_res_set_reason(nng_http_res *res, const char *reason);
----
== DESCRIPTION
The `nng_http_res_set_reason()` sets the human readable "reason phrase"
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.3http#,`nng_http_res_set_status()`>>).
TIP: The _reason_ is never parsed automatically, but it can be a hint for humans
to help them understand the nature of any erroroneous 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.
== SEE ALSO
<<nng_http_res_alloc.3http#,nng_http_res_alloc(3http)>>,
<<nng_http_res_get_reason.3http#,nng_http_req_get_reason(3http)>>,
<<nng_http_res_set_status.3http#,nng_http_req_set_status(3http)>>,
<<nng.7#,nng(7)>>
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