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= nng_http_res_copy_data(3)
:doctype: manpage
:manmanual: nng
:mansource: nng
:manvolnum: 3
:copyright: Copyright 2018 Staysail Systems, Inc. <info@staysail.tech> \
Copyright 2018 Capitar IT Group BV <info@capitar.com> \
This software 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_copy_data - copy HTTP response body
== SYNOPSIS
[source, c]
-----------
#include <nng/nng.h>
int nng_http_res_copy_data(nng_http_res *res, const void *body, size_t size);
-----------
== DESCRIPTION
The `nng_http_res_copy_data()` makes a copy of _body_ (of size __size__)
and sets the HTTP body for the response _res_ to it. The copy will be
deallocated automatically when _res_ is freed.
The copied body data will be automatically sent with the response when it
is sent using <<nng_http_conn_write_res#,nni_http_conn_write_res(3)>>.
This also updates the relevant `Content-Length` header of _res_.
NOTE: The current framework does not support sending data via chunked
transfer-encoding.
TIP: To avoid copying data, the
<<nng_http_res_set_data#,nng_http_res_set_data(3)>> may be used instead.
TIP: It is a good idea to also set the `Content-Type` header.
== 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_conn_write_res#,nng_http_conn_write_res(3)>>,
<<nng_http_res_alloc#,nng_http_res_alloc(3)>>,
<<nng_http_res_set_data#,nng_http_res_set_data(3)>>,
<<nng_http_res_set_header#,nng_http_res_set_header(3)>>,
<<nng#,nng(7)>>
== COPYRIGHT
Copyright 2018 mailto:info@staysail.tech[Staysail Systems, Inc.] +
Copyright 2018 mailto:info@capitar.com[Capitar IT Group BV]
This document is supplied under the terms of the
https://opensource.org/licenses/MIT[MIT License].
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