= nng_http_server_res_error(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_server_res_error - use HTTP server error page

== SYNOPSIS

[source, c]
----
#include <nng/nng.h>
#include <nng/supplemental/http/http.h>

int nng_http_server_set_error_file(nng_http_server *server,
        nng_http_res *response);
----

== DESCRIPTION

The `nng_http_server_res_error()` sets the body of _response_
to _server_'s error page, which may have been customized using the
`<<nng_http_server_set_error_file.3http#,nng_http_server_error_file()>>`
or
`<<nng_http_server_set_error_page.3http#,nng_http_server_error_page()>>`
functions.

The status code of the _response_ should have already been set, either
implicitly by allocating it with
`<<nng_http_res_alloc_error.3http#,nng_http_res_alloc_error()>>`,
or by calling
`<<nng_http_res_set_status.3http#,nng_http_res_set_status()>>`.

Any content body previously set for _response_ will be overridden by
this function.

== RETURN VALUES

This function returns 0 on success, and non-zero otherwise.

== ERRORS

[horizontal]
`NNG_ENOMEM`:: Insufficient free memory exists.
`NNG_ENOTSUP`:: HTTP not supported.

== SEE ALSO

[.text-left]
<<nng_http_res_alloc_error.3http#,nng_http_res_alloc_error(3http)>>,
<<nng_http_server_hold.3http#,nng_http_server_hold(3http)>>,
<<nng_http_server_set_error_file.3http#,nng_http_server_set_error_file(3http)>>,
<<nng_http_server_set_error_page.3http#,nng_http_server_set_error_page(3http)>>,
<<nng_strerror.3#,nng_strerror(3)>>,
<<nng.7#,nng(7)>>