= nng_http_res_alloc_error(3http)
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//
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// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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//
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// This document is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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== NAME
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nng_http_res_alloc_error - allocate HTTP error response
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== SYNOPSIS
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[source, c]
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----
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#include <nng/nng.h>
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#include <nng/supplemental/http/http.h>
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int nng_http_res_alloc_error(nng_http_res **resp, uint16_t status);
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----
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== DESCRIPTION
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The `nng_http_res_alloc_error()` function allocates a new HTTP response structure
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and stores a pointer to it in __resp__.
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The response will be initialized
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with the status code _status_, a corresponding reason phrase, and
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a simple HTML page containing the same information will be generated and
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attached to the response.
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(Relevant HTTP headers will be set as well, such as `Content-Type`
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and `Content-Length`.)
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The HTTP protocol version is also set to "HTTP/1.1".
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TIP: This is the simplest way to generate an error response.
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== RETURN VALUES
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This function returns 0 on success, and non-zero otherwise.
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== ERRORS
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[horizontal]
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`NNG_ENOMEM`:: Insufficient free memory exists to allocate a message.
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`NNG_ENOTSUP`:: HTTP support not configured.
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== SEE ALSO
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[.text-left]
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xref:nng_http_res_alloc.3http.adoc[nng_http_res_alloc(3http)],
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xref:nng_http_res_free.3http.adoc[nng_http_res_free(3http)],
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xref:nng_http_res_set_reason.3http.adoc[nng_http_res_set_reason(3http)],
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xref:nng_http_res_set_status.3http.adoc[nng_http_res_set_status(3http)],
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xref:nng_strerror.3.adoc[nng_strerror(3)],
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xref:nng.7.adoc[nng(7)]
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