client & server: changed from TCP stream to WebSocket implementations
This commit is contained in:
@@ -1,187 +1,251 @@
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from twisted.internet.protocol import DatagramProtocol
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from twisted.internet import reactor
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from time import sleep
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import json
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import random
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import socket
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import sys
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import threading
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def address_to_string(address):
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ip, port = address
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return ':'.join([ip, str(port)])
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import asyncio
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from websockets.asyncio.server import serve
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class ServerProtocol(DatagramProtocol):
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def generate_code() -> str:
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result = ""
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for i in range(6):
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result += chr(random.randint(0, 25) + 65)
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return result
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def __init__(self):
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self.active_sessions: dict[Session] = {}
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self.registered_clients: dict[Client] = {}
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# Checks whether a client with the given client_id is already registered.
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def is_client_registered(self, client_id):
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return client_id in self.registered_clients
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# Checks if a session has already been registered with the given session_id.
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def session_exists(self, session_id) -> bool:
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return session_id in self.active_sessions
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# Creates a new session for players to join.
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def create_session(self, session_id, host_client_id) -> int:
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if self.session_exists(session_id):
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# Tried to create existing session
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return 1
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self.active_sessions[session_id] = Session(session_id, host_client_id, self)
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return 0
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# Closes an existing session. Must disconnect all clients manually before calling this!
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def close_session(self, s_id):
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try:
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del self.active_sessions[s_id]
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except KeyError:
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print("Tried to terminate non-existing session")
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# Registers a client and connects them to a given session.
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def register_client(self, session_id, client_id, client_name, client_ip, client_port) -> int:
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if self.is_client_registered(client_id):
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print("Client %s is already registered." % [client_id])
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return 1
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if not self.session_exists(session_id):
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print("Client registered for non-existing session")
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return 2
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if len(self.active_sessions[session_id].registered_clients) >= 2:
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print("Trying to join full session")
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return 3
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new_client = Client(session_id, client_id, client_name, client_ip, client_port)
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self.registered_clients[client_id] = new_client
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self.active_sessions[session_id].register_client(new_client)
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return 0
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# Disconnects a client and removes them from the registered_clients.
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def disconnect_client(self, session_id, client_id):
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try:
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del self.registered_clients[client_id]
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self.active_sessions[session_id].remove_client(client_id)
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except KeyError:
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print("Tried to disconnect unregistered client %s." % [client_id])
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# Checks whether the given client owns any session. Returns the session ID if true.
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# Returns an empty string otherwise.
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def owns_session(self, client_id) -> str:
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for session_id in self.active_sessions:
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if self.active_sessions[session_id].host_client_id == client_id:
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return session_id
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return ""
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# Sends a message to a client specified by their address.
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def send_message(self, msg, address):
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self.transport.write(bytes(msg, "utf-8"), address)
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# Executed when data is received from a client.
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def datagramReceived(self, datagram, address):
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"""Handle incoming datagram messages."""
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print(datagram)
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data_string = datagram.decode("utf-8")
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msg_type = data_string[:2]
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print(address)
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client_ip, client_port = address
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split_data = data_string.split(":")
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if msg_type == "cr":
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# create lobby
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error = self.create_session(split_data[1], split_data[2])
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if error == 1:
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# tried to create existing session
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print("Could not create session; already exists")
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self.transport.write(bytes('c1', "utf-8"), address)
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return
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# TODO no error handling for register_client here yet
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print(self.register_client(split_data[1], split_data[2], split_data[3], client_ip, client_port))
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print(client_port)
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print("CLIENT PORT")
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print("successfully created session and registered client")
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self.transport.write(bytes('c0', "utf-8"), address)
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elif msg_type == "jn":
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# join lobby
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error = self.register_client(split_data[1], split_data[2], split_data[3], client_ip, client_port)
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print(client_port)
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print("CLIENT PORT")
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if error == 1:
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# client already registered
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self.send_message('j1', address)
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return
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elif error == 2:
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# session does not exist
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self.send_message('j2', address)
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return
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elif error == 3:
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# session full
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self.send_message('j3', address)
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return
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self.send_message('j0', address)
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print("joined successfully")
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elif msg_type == "lv":
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session_id = split_data[1]
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leaving_client_id = split_data[2]
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owned_session = self.owns_session(leaving_client_id)
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if owned_session == "":
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# client is only connected to a session
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self.disconnect_client(session_id, leaving_client_id)
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print("disconnected client from session")
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else:
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# client owns a session
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# disconnect all clients
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clients_to_delete = self.active_sessions[session_id].registered_clients.copy()
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for client in clients_to_delete:
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print(clients_to_delete)
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print(client)
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client_address = (client.client_ip, client.client_port)
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print(client_address)
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self.send_message('ex', client_address)
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self.disconnect_client(client.session_id, client.client_id)
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self.close_session(session_id)
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print("host gone; disconnected clients and closed session")
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class Session:
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def __init__(self, session_id, host_client_id, server):
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self.id = session_id
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self.host_client_id = host_client_id
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self.server = server
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self.registered_clients: list[Client] = []
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# Registers a client in the session.
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def register_client(self, client):
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if client in self.registered_clients:
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# Client is already registered
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return
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self.registered_clients.append(client)
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class Lobby:
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def remove_client(self, client_id):
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for client in self.registered_clients:
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if client.client_id == client_id:
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self.registered_clients.remove(client)
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def __init__(self, lobby_id, host_client_id):
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self.lobby_id = lobby_id
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self.host_client_id = host_client_id
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self.connected_clients = {}
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class Client:
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def __init__(self, session_id, client_id, client_name, client_ip, client_port):
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self.session_id = session_id
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def __init__(self, client_id, client_name, websocket):
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self.client_id = client_id
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self.client_name = client_name
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self.client_ip = client_ip
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self.client_port = client_port
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self.websocket = websocket
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class LobbyManager:
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def __init__(self):
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self.active_lobbies = {}
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def get_lobby(self, lobby_id) -> Lobby:
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return self.active_lobbies[lobby_id]
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def lobby_id_exists(self, lobby_id) -> bool:
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return lobby_id in self.active_lobbies
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def client_id_exists_in_lobby(self, lobby_id, client_id) -> bool:
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if not self.lobby_id_exists(lobby_id):
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return False
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return client_id in self.active_lobbies[lobby_id].connected_clients
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def get_unique_lobby_id(self) -> str:
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id = generate_code()
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if self.lobby_id_exists(id):
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return self.get_unique_lobby_id()
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return id
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def get_unique_client_id(self, lobby_id) -> str:
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id = generate_code()
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if self.client_id_exists_in_lobby(lobby_id, id):
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return self.get_unique_client_id(lobby_id)
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return id
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def create_lobby(self, lobby_id, host_client_id) -> None:
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self.active_lobbies[lobby_id] = Lobby(lobby_id, host_client_id)
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print(f"Created lobby {lobby_id}")
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def delete_lobby(self, lobby_id) -> None:
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try:
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del self.active_lobbies[lobby_id]
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print(f"Deleted lobby {lobby_id}")
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except KeyError:
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print(f"Lobby with ID {lobby_id} not found, could not be deleted")
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async def join_lobby(self, lobby_id, client_id, client_name, websocket) -> None:
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self.active_lobbies[lobby_id].connected_clients[client_id] = Client(
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client_id,
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client_name,
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websocket,
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)
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print(f"Client {client_id} joined lobby {lobby_id}")
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await self.broadcast_message(
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lobby_id,
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json.dumps({
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"response": "client_joined_lobby",
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"new_client_id": client_id,
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"new_client_name": client_name,
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})
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)
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async def leave_lobby(self, lobby_id, client_id) -> None:
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try:
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# get client name BEFORE deleting the client...
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client_name = self.get_client_name(lobby_id, client_id)
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del self.active_lobbies[lobby_id].connected_clients[client_id]
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await self.broadcast_message(
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lobby_id,
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json.dumps({
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"response": "client_left_lobby",
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"status": "ok",
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"client_name": client_name,
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}),
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)
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print(f"Deleted client {client_id} from lobby {lobby_id}")
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except KeyError:
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print(f"Client with ID {client_id} in lobby {lobby_id} not found, could not be deleted")
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def get_lobby_player_count(self, lobby_id) -> int:
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return len(self.active_lobbies[lobby_id].connected_clients)
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def get_client_name(self, lobby_id, client_id) -> str:
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return self.active_lobbies[lobby_id].connected_clients[client_id].client_name
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def get_lobby_host_client_id(self, lobby_id) -> str:
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return self.active_lobbies[lobby_id].host_client_id
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async def send_message(self, lobby_id, client_id, message) -> None:
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await self.active_lobbies[lobby_id].connected_clients[client_id].websocket.send(message)
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async def broadcast_message(self, lobby_id, message) -> None:
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connected_clients = self.active_lobbies[lobby_id].connected_clients
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for client_id in connected_clients:
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await connected_clients[client_id].websocket.send(message)
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# class ClientConnection:
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# def __init__(self, connection, address, lobby_manager):
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# self.connection = connection
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# self.address = address
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# self.lobby_manager = lobby_manager
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# self.listen_client()
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# # Listens to a connected TCP client.
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# def listen_client(self) -> None:
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# try:
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# print(f"Connected to {self.address[0]}:{self.address[1]}")
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# received_data = ""
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# while True:
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# data = self.connection.recv(1)
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# received_data += data.decode("utf-8")
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# if received_data[-1] == "}":
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# print(received_data)
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# self.process_input(received_data)
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# received_data = ""
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# if not data:
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# break
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# except IndexError:
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# print("Client force-disconnected")
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# except ConnectionResetError:
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# print("Client force-disconnected")
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# finally:
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# self.connection.close()
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# print(f"Closing connection to {self.address[0]}:{self.address[1]}")
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lobby_manager = LobbyManager()
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async def listen_websocket() -> None:
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async with serve(start_listen_client_websocket, "localhost", 9974) as server:
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await server.serve_forever()
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async def start_listen_client_websocket(websocket) -> None:
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async for message in websocket:
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# await
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await process_input(message, websocket)
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async def process_input(message: str, websocket) -> None:
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data_object = json.loads(message)
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if data_object["response"] == "create_lobby":
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new_lobby_id = lobby_manager.get_unique_lobby_id()
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new_client_id = lobby_manager.get_unique_client_id(new_lobby_id)
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print(new_client_id + " is creating lobby " + new_lobby_id)
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lobby_manager.create_lobby(
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new_lobby_id,
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new_client_id,
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)
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await lobby_manager.join_lobby(
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new_lobby_id,
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new_client_id,
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data_object["client_name"],
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websocket,
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)
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await lobby_manager.send_message(
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new_lobby_id,
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new_client_id,
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json.dumps({
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"response": "create_lobby",
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"status": "ok",
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"lobby_id": new_lobby_id,
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"client_id": new_client_id,
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}),
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)
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elif data_object["response"] == "join_lobby":
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print("joining lobby")
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lobby_id = data_object["lobby_id"]
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new_client_id = lobby_manager.get_unique_client_id(lobby_id)
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await lobby_manager.join_lobby(
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lobby_id,
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new_client_id,
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data_object["client_name"],
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websocket,
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)
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await lobby_manager.send_message(
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lobby_id,
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new_client_id,
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json.dumps({
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"response": "join_lobby",
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"status": "ok",
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"client_id": new_client_id,
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}),
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)
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# send message to all connected clients
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elif data_object["response"] == "leave_lobby":
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print("leaving lobby")
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lobby_id = data_object["lobby_id"]
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host_client_id = lobby_manager.get_lobby_host_client_id(lobby_id)
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if host_client_id == data_object["client_id"]:
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# client is host; close lobby
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await lobby_manager.leave_lobby(lobby_id, data_object["client_id"])
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await lobby_manager.broadcast_message(
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lobby_id,
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json.dumps({
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"response": "leave_lobby_request",
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})
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)
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if lobby_manager.get_lobby_player_count(lobby_id) == 0:
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lobby_manager.delete_lobby(lobby_id)
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else:
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# client is not host; client leaves only
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await lobby_manager.leave_lobby(lobby_id, data_object["client_id"])
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elif data_object["response"] == "send_chat_message":
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print("relaying chat message")
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await lobby_manager.broadcast_message(
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data_object["lobby_id"],
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json.dumps({
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"response": "receive_chat_message",
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"message": data_object["message"],
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"client_name": lobby_manager.get_client_name(data_object["lobby_id"], data_object["client_id"]),
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})
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)
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if __name__ == '__main__':
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if len(sys.argv) < 2:
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@@ -189,6 +253,13 @@ if __name__ == '__main__':
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sys.exit(1)
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port = int(sys.argv[1])
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reactor.listenUDP(port, ServerProtocol())
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# tcp_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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# server_address = ('168.119.97.227', port)
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# tcp_socket.bind(server_address)
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# tcp_socket.listen(1)
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# tcp_socket.settimeout(0.5)
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print('Listening on *:%d' % (port))
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reactor.run()
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# listen()
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asyncio.run(listen_websocket())
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