= nng_http_req_set_data(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_req_set_data - set HTTP request body
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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_req_set_data(nng_http_req *req, const void *body, size_t size);
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----
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== DESCRIPTION
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The `nng_http_req_set_data()` sets the HTTP body associated with
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the request _req_ to _body_, and the size of the body to _size_.
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This body data will be automatically sent with the request when it
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is sent using xref:nng_http_conn_write_req.3http.adoc[`nng_http_conn_write_req()`].
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This also updates the relevant `Content-Length` header of _req_.
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NOTE: The current framework does not support sending data via chunked
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transfer-encoding.
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The _body_ is *not* copied, and the caller must ensure that it is available
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until the _req_ is deallocated.
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TIP: To have a local copy allocated with _req_ that will be automatically
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deallocated when _req_ is freed,
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see xref:nng_http_req_copy_data.3http.adoc[`nng_http_req_copy_data()`].
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TIP: It is a good idea to also set the `Content-Type` header.
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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 memory to perform the operation.
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`NNG_ENOTSUP`:: No support for HTTP in the library.
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== SEE ALSO
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[.text-left]
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xref:nng_http_conn_write_req.3http.adoc[nng_http_conn_write_req(3http)],
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xref:nng_http_req_alloc.3http.adoc[nng_http_req_alloc(3http)],
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xref:nng_http_req_copy_data.3http.adoc[nng_http_req_copy_data(3http)],
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xref:nng_http_req_set_header.3http.adoc[nng_http_req_set_header(3http)],
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xref:nng.7.adoc[nng(7)]
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