= gun:shutdown(3)

== Name

gun:shutdown - Gracefully close the connection

== Description

[source,erlang]
----
shutdown(ConnPid) -> ok

ConnPid :: pid()
----

Gracefully close the connection.

Gun will wait for up to `closing_timeout` milliseconds
before brutally closing the connection. The graceful
shutdown mechanism varies between the different protocols:

* For HTTP/1.1 there is no such mechanism and Gun will
  close the connection once the current response is
  received. Any pipelined requests are immediately
  terminated.

* For HTTP/2 Gun will send a GOAWAY frame and wait for
  the existing streams to terminate.

* For Websocket Gun will send a close frame and wait
  for the server's close frame before closing the
  connection.

The function returns immediately. The connection may
therefore still be up for some time after this call.

Gun will not attempt to reconnect once graceful
shutdown has been initiated.

== Arguments

ConnPid::

The pid of the Gun connection process.

== Return value

The atom `ok` is returned.

== Changelog

* *2.0*: Function introduced.

== Examples

.Gracefully shutdown the connection
[source,erlang]
----
ok = gun:shutdown(ConnPid).
----

== See also

link:man:gun(3)[gun(3)],
link:man:gun:open(3)[gun:open(3)],
link:man:gun:open_unix(3)[gun:open_unix(3)],
link:man:gun:close(3)[gun:close(3)]