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+= nng_http_handler_set_data(3http)
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document 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_handler_get_data - set extra data for HTTP handler
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+#include <nng/supplemental/http/http.h>
+
+void *nng_http_handler_get_data(nng_http_handler *handler, void *data,
+    void (*dtor)(void *));
+----
+
+== DESCRIPTION
+
+The `nng_http_handler_set_data()` function is used to set an additional
+_data_ for the _handler_.
+The stored _data_ can be retrieved later in the handler function using
+<<nng_http_handler_get_data.3http#,`nng_http_handler_get_data()`>>.
+
+Additionally, when the handler is deallocated, if _dtor_ is not `NULL`,
+then it will be called with _data_ as its argument.
+The intended use of
+this function is deallocate any resources associated with _data_.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+`NNG_ENOMEM`:: Insufficient free memory to perform the operation.
+`NNG_ENOTSUP`:: No support for HTTP in the library.
+
+== SEE ALSO
+
+<<nng_http_handler_alloc.3http#,nng_http_handler_alloc(3http)>>,
+<<nng_http_handler_get_data.3http#,nng_http_server_get_data(3http)>>,
+<<nng_http_server_add_handler.3http#,nng_http_server_add_handler(3http)>>,
+<<nng.7#,nng(7)>>