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+= nng_http_conn_write(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_conn_write - write to HTTP connection
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+#include <nng/supplemental/http/http.h>
+
+void nng_http_conn_write(nng_http_conn *conn, nng_aio *aio);
+----
+
+== DESCRIPTION
+
+The `nng_http_conn_write()` function starts an asynchronous write to the
+HTTP connection _conn_ from the scatter/gather vector located in the
+asynchronous I/O structure _aio_.
+
+NOTE: The <<nng_aio_set_iov.3#,`nng_aio_set_iov()`>> function must have been
+called first, to set the scatter/gather vector for _aio_.
+
+This function returns immediately, with no return value.
+Completion of the operation is signaled via the _aio_, and the final
+result may be obtained via <<nng_aio_result.3#,`nng_aio_result()`>>.
+That result will either be zero or an error code.
+
+The I/O operation completes as soon as at least one byte has been
+written, or an error has occurred.
+Therefore, the number of bytes written may be less than requested.
+The actual number of bytes written can be determined with
+<<nng_aio_count.3#,`nng_aio_count()`>>.
+
+TIP: This function is intended to facilitate uses cases that involve changing
+the protocol from HTTP, such as WebSocket.
+Most applications will never need to use this function.
+
+== RETURN VALUES
+
+None.
+
+== ERRORS
+
+`NNG_ECANCELED`:: The operation was canceled.
+`NNG_ECLOSED`:: The connection was closed.
+`NNG_ECONNRESET`:: The peer closed the connection.
+`NNG_EINVAL`:: The _aio_ does not contain a valid scatter/gather vector.
+`NNG_ENOMEM`:: Insufficient free memory to perform the operation.
+`NNG_ENOTSUP`:: HTTP operations are not supported.
+`NNG_ETIMEDOUT`:: Timeout waiting for data from the connection.
+
+== SEE ALSO
+
+<<nng_aio_alloc.3#,nng_aio_alloc(3)>>,
+<<nng_aio_count.3#,nng_aio_count(3)>>,
+<<nng_aio_result.3#,nng_aio_result(3)>>,
+<<nng_aio_set_iov.3#,nng_aio_set_iov(3)>>,
+<<nng_http_client_connect.3http#,nng_http_client_connect(3http)>>,
+<<nng_http_conn_write_all.3http#,nng_http_conn_write_all(3http)>>,
+<<nng_http_handler_alloc.3http#,nng_http_handler_alloc(3http)>>,
+<<nng_strerror.3#,nng_strerror(3)>>,
+<<nng.7#,nng(7)>>