= nng_http_req_set_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_req_set_data - set HTTP request body

== SYNOPSIS

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

int nng_http_req_set_data(nng_http_req *req, const void *body, size_t size);
-----------

== DESCRIPTION

The `nng_http_req_set_data()` sets the HTTP body associated with
the request _req_ to _body_, and the size of the body to _size_.
This body data will be automatically sent with the request when it
is sent using <<nng_http_conn_write_req#,nni_http_conn_write_req(3)>>.

This also updates the relevant `Content-Length` header of _req_.

NOTE: The current framework does not support sending data via chunked
transfer-encoding.

The _body_ is *not* copied, and the caller must ensure that it is available
until the _req_ is deallocated.

TIP: To have a local copy allocated with _req_ that will be automatically
deallocated when _req_ is freed,
see <<nng_http_req_copy_data#,nng_http_req_copy_data(3)>>.

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_req#,nng_http_conn_write_req(3)>>,
<<nng_http_req_alloc#,nng_http_req_alloc(3)>>,
<<nng_http_req_copy_data#,nng_http_req_copy_data(3)>>,
<<nng_http_req_set_header#,nng_http_req_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].
