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= nng_http_req_get_header(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_get_header - return HTTP request header
== SYNOPSIS
[source, c]
-----------
#include <nng/nng.h>
const char *nng_http_req_get_header(nng_http_req *req, const char *key);
-----------
== DESCRIPTION
The `nng_http_req_get_header()` looks for an HTTP header _key_ in
the request _req_, and returns the associated value if found,
or `NULL` if not found.
The value of _key_ is case insensitive, and should not include the final
colon in an HTTP header. For example, specifying `Host` or `hOSt` are
equivalent, whereas the value `Host:` will not find anything.
== RETURN VALUES
HTTP header value for _key_, if it exists, or NULL otherwise.
== ERRORS
None.
== SEE ALSO
<<nng_http_req_alloc#,nng_http_req_alloc(3)>>,
<<nng_http_req_add_header#,nng_http_req_add_header(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].
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