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class_name GCClient
extends Node
# CONNECTION DATA
enum { NONE, SERVER_BROWSER, LOBBY_WAITING, LOBBY, VOICE }
var connection_type : int = NONE
var socket_client: WebSocketClient = null
var socket: WebSocketPeer = null
enum { CONNECTION_FAILED, CONNECTION_DISCONNECTED, CONNECTION_CONNECTING, CONNECTION_CONNECTED, CONNECTION_DISCONNECTING }
var state: int = CONNECTION_DISCONNECTED
var message_queue : Array = [] # messages to be sent upon connection
# END CONNECTION DATA
# GC DATA
# connected from menus
signal gc_connection_failed()
signal lobby_list_acquired(lobbies) # connected before calling get_lobby_list to retrieve result
signal join_request_success()
signal join_failure(reason)
signal join_success(args)
signal host_failure(reason)
signal host_success()
# connected from in game
signal disconnected_from_lobby(reason)
signal join_request_received(player_id, args)
signal connection_closed_dirty() # game should be quit for unexpected reasons
var is_host : bool
var host_id : String = ""
var lobby_id : String = ""
var player_id : String = ""
var rejoin_key : String = ""
var players : Array = []
var max_players : int = -1
var lobby_name : String = ""
var is_private : bool = false
var lobby_password : String = ""
const GC_MSG_TYPES : Array = ["join_request_ok", "join_ok", "join_fail",
"rejoin_ok", "rejoin_fail", "host_ok", "host_fail",
"disconnected", "join_request", "lobby_closing"]
# END GC DATA
func _ready():
socket_client = WebSocketClient.new()
socket_client.connect("connection_established", self, "on_connection_success")
socket_client.connect("connection_closed", self, "on_connection_close")
socket_client.connect("connection_error", self, "on_connection_error")
#socket_client.connect("data_received", self, "receive")
func gc_client_reset():
self.player_id = ""
self.lobby_id = ""
self.host_id = ""
self.rejoin_key = ""
self.players.clear()
self.is_host = false
self.connection_type = NONE
self.max_players = -1
self.lobby_name = ""
self.is_private = false
func connect_to_gc(c_type: int):
if !(c_type in [SERVER_BROWSER, LOBBY_WAITING, VOICE]):
print("Invalid connection type!")
return
gc_client_reset()
connection_type = c_type
var url : String = Globals.GC_URL
print("Connecting to game coordinator: %s..." % url)
message_queue.clear()
var error = socket_client.connect_to_url(url)
if error != OK:
return error
state = CONNECTION_CONNECTING
return OK
func close_socket(code = 1000, reason = ""):
if state == CONNECTION_DISCONNECTED or state == CONNECTION_FAILED: return
print("Closing websocket...")
socket_client.disconnect_from_host(code, reason)
state = CONNECTION_DISCONNECTING # DISCONNECTING
func on_connection_success(protocol):
print("WebSocket connection success with protocol %s." % protocol)
socket = socket_client.get_peer(1)
socket.set_write_mode(WebSocketPeer.WRITE_MODE_TEXT) # defaults to text mode
state = CONNECTION_CONNECTED # CONNECTED
while len(message_queue) > 0:
var msg = message_queue.pop_at(0)
send(msg)
func on_connection_close(clean):
print("WebSocket closed successfully.")
socket = null
connection_type = NONE
if clean:
state = CONNECTION_DISCONNECTED # DISCONNECTED
else:
emit_signal("connection_closed_dirty")
state = CONNECTION_FAILED # DISCONNECT DIRTY
func on_connection_error(): # connection failed
print("WebSocket connection failed!")
socket = null
state = CONNECTION_FAILED # DISCONNECT DIRTY
connection_type = NONE
emit_signal("gc_connection_failed")
func send(message, as_bytes=false) -> int:
if state != CONNECTION_CONNECTED:
message_queue.push_back(message)
return -1
return socket.put_packet(message)
func send_json(message) -> int:
if state != CONNECTION_CONNECTED:
message_queue.push_back(JSON.print(message).to_utf8())
return -1
var message_json = JSON.print(message).to_utf8()
return socket.put_packet(message_json)
func receive():
if state != CONNECTION_CONNECTED: return null
if socket.get_available_packet_count() < 1: return null
var packet : PoolByteArray = socket.get_packet()
if socket.was_string_packet():
var message = packet.get_string_from_utf8()
var json = JSON.parse(message)
if json.error:
return null
message = json.result
process_gc_message(message)
return message
return null # bytes2var(packet)
# process GC state specific message/content of messages
# returns false in the case of game-breaking invalid message receipt
func process_gc_message(message):
# always update player information whenever an update is received from the GC
if "current_players" in message:
for player in players:
if player["is_host"] and self.host_id != player["player_id"]:
self.host_id = player["player_id"]
self.is_host = self.host_id == self.player_id
if "type" in message and (message["type"] in GC_MSG_TYPES): # validate GC message format
if message["type"] == "join_request_ok":
if !("player_id" in message and "rejoin_key" in message):
close_socket() # GC did not provide necessary info
self.player_id = message["player_id"]
self.rejoin_key = message["rejoin_key"]
self.lobby_name = message["lobby_name"]
self.max_players = message["max_players"]
self.is_private = message["private"]
emit_signal("join_request_success")
elif message["type"] == "join_ok":
self.connection_type = LOBBY
var join_args = {}
if "args" in message:
join_args = message["args"]
emit_signal("join_success", join_args)
elif message["type"] == "join_fail":
var reason = "Unknown failure." if not ("message" in message) else message["message"]
gc_client_reset()
emit_signal( "join_failure", reason )
elif message["type"] == "disconnected":
state = CONNECTION_DISCONNECTING # socket will be closed soon
close_socket()
gc_client_reset()
emit_signal( "disconnected_from_lobby", message["reason"] )
elif message["type"] == "host_ok":
if !(("player_id" in message) and ("rejoin_key" in message) and ("lobby_id" in message)):
close_socket() # GC did not provide necessary info
self.lobby_id = message["lobby_id"]
self.player_id = message["player_id"]
self.rejoin_key = message["rejoin_key"]
self.is_host = true
self.connection_type = LOBBY
emit_signal("host_success")
elif message["type"] == "host_fail":
var reason = "Unknown failure." if not ("message" in message) else message["message"]
close_socket()
gc_client_reset()
emit_signal("host_failure", reason)
elif message["type"] == "join_request":
if !("player_id" in message and "args" in message):
print("Invalid join request received.")
return
emit_signal("join_request_received", message["player_id"], message["args"])
elif message["type"] == "lobby_list":
emit_signal("lobby_list_acquired", message["lobby_list"])
gc_client_reset()
close_socket()
elif message["type"] == "lobby_closing":
emit_signal("disconnected_from_lobby", "Lobby closing.")
gc_client_reset()
close_socket()
return
func get_lobby_list():
gc_client_reset()
var message = {"type" : "list_open_lobbies"}
if state != CONNECTION_CONNECTED:
connect_to_gc(SERVER_BROWSER)
send_json( message )
else:
send_json( message )
func host_lobby(lobby_name : String, username : String, max_players : int, private : bool, password : String = ""):
close_socket()
gc_client_reset()
var request = {"type" : "host_lobby", "lobby_name" : lobby_name, "game_type" : Globals.GAME_TYPE, "lobby_id" : lobby_id, "username" : username, "max_players" : max_players, "private" : private, "password" : password}
connect_to_gc(LOBBY_WAITING)
self.lobby_name = lobby_name
self.max_players = max_players
self.is_private = private
self.lobby_password = password
send_json(request)
func join_lobby(lobby_id : String, password : String, username : String, args = null):
close_socket()
gc_client_reset()
var request = {"type" : "join_lobby", "game_type" : Globals.GAME_TYPE, "lobby_id" : lobby_id, "password" : password, "username" : username}
if args: request["args"] = args
connect_to_gc(LOBBY_WAITING)
self.lobby_id = lobby_id
self.is_host = false
self.lobby_password = password
send_json(request)
func _process(_delta):
socket_client.poll()
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