Document how to set up UPnP in a non-blocking manner

(cherry picked from commit f4bebc272c)
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Hugo Locurcio 2021-04-06 18:36:52 +02:00 committed by Rémi Verschelde
parent 1d3f1c8c0a
commit 7e3016ebfd
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@ -16,6 +16,38 @@
[codeblock]
upnp.delete_port_mapping(port)
[/codeblock]
[b]Note:[/b] UPnP discovery blocks the current thread. To perform discovery without blocking the main thread, use [Thread]s like this:
[codeblock]
# Emitted when UPnP port mapping setup is completed (regardless of success or failure).
signal upnp_completed(error)
# Replace this with your own server port number between 1025 and 65535.
const SERVER_PORT = 3928
var thread = null
func _upnp_setup(server_port):
# UPNP queries take some time.
var upnp = UPNP.new()
var err = upnp.discover()
if err != OK:
push_error(str(err))
emit_signal("upnp_completed", err)
return
if upnp.get_gateway() and upnp.get_gateway().is_valid_gateway():
upnp.add_port_mapping(server_port, server_port, ProjectSettings.get_setting("application/config/name"), "UDP")
upnp.add_port_mapping(server_port, server_port, ProjectSettings.get_setting("application/config/name"), "TCP")
emit_signal("upnp_completed", OK)
func _ready():
thread = Thread.new()
thread.start(self, "_upnp_setup", SERVER_PORT)
func _exit_tree():
# Wait for thread finish here to handle game exit while the thread is running.
thread.wait_to_finish()
[/codeblock]
</description>
<tutorials>
</tutorials>