671 lines
29 KiB
TypeScript
671 lines
29 KiB
TypeScript
import socketIO = require('socket.io');
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import {Socket} from "socket.io";
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import * as http from "http";
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import {MessageUserPosition, Point} from "../Model/Websocket/MessageUserPosition"; //TODO fix import by "_Model/.."
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import {ExSocketInterface} from "../Model/Websocket/ExSocketInterface"; //TODO fix import by "_Model/.."
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import Jwt, {JsonWebTokenError} from "jsonwebtoken";
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import {SECRET_KEY, MINIMUM_DISTANCE, GROUP_RADIUS, ALLOW_ARTILLERY} from "../Enum/EnvironmentVariable"; //TODO fix import by "_Enum/..."
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import {World} from "../Model/World";
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import {Group} from "../Model/Group";
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import {User} from "../Model/User";
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import {isSetPlayerDetailsMessage,} from "../Model/Websocket/SetPlayerDetailsMessage";
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import {MessageUserJoined} from "../Model/Websocket/MessageUserJoined";
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import {MessageUserMoved} from "../Model/Websocket/MessageUserMoved";
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import si from "systeminformation";
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import {Gauge} from "prom-client";
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import {TokenInterface} from "../Controller/AuthenticateController";
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import {isJoinRoomMessageInterface} from "../Model/Websocket/JoinRoomMessage";
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import {isPointInterface, PointInterface} from "../Model/Websocket/PointInterface";
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import {isWebRtcSignalMessageInterface} from "../Model/Websocket/WebRtcSignalMessage";
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import {UserInGroupInterface} from "../Model/Websocket/UserInGroupInterface";
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import {isItemEventMessageInterface} from "../Model/Websocket/ItemEventMessage";
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import {uuid} from 'uuidv4';
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import {isViewport} from "../Model/Websocket/ViewportMessage";
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import {GroupUpdateInterface} from "_Model/Websocket/GroupUpdateInterface";
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import {Movable} from "../Model/Movable";
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import {PositionMessage, SetPlayerDetailsMessage} from "../../../messages/generated/messages_pb";
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import {UserMovesMessage} from "../../../messages/generated/messages_pb";
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import Direction = PositionMessage.Direction;
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enum SocketIoEvent {
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CONNECTION = "connection",
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DISCONNECT = "disconnect",
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JOIN_ROOM = "join-room", // bi-directional
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USER_POSITION = "user-position", // From client to server
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USER_MOVED = "user-moved", // From server to client
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USER_LEFT = "user-left", // From server to client
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WEBRTC_SIGNAL = "webrtc-signal",
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WEBRTC_SCREEN_SHARING_SIGNAL = "webrtc-screen-sharing-signal",
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WEBRTC_START = "webrtc-start",
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WEBRTC_DISCONNECT = "webrtc-disconect",
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MESSAGE_ERROR = "message-error",
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GROUP_CREATE_UPDATE = "group-create-update",
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GROUP_DELETE = "group-delete",
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SET_PLAYER_DETAILS = "set-player-details",
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ITEM_EVENT = 'item-event',
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SET_SILENT = "set_silent", // Set or unset the silent mode for this user.
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SET_VIEWPORT = "set-viewport",
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BATCH = "batch",
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}
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function emitInBatch(socket: ExSocketInterface, event: string | symbol, payload: unknown): void {
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socket.batchedMessages.push({ event, payload});
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if (socket.batchTimeout === null) {
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socket.batchTimeout = setTimeout(() => {
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socket.emit(SocketIoEvent.BATCH, socket.batchedMessages);
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socket.batchedMessages = [];
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socket.batchTimeout = null;
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}, 100);
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}
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}
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export class IoSocketController {
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public readonly Io: socketIO.Server;
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private Worlds: Map<string, World> = new Map<string, World>();
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private sockets: Map<number, ExSocketInterface> = new Map<number, ExSocketInterface>();
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private nbClientsGauge: Gauge<string>;
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private nbClientsPerRoomGauge: Gauge<string>;
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private nextUserId: number = 1;
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constructor(server: http.Server) {
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this.Io = socketIO(server);
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this.nbClientsGauge = new Gauge({
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name: 'workadventure_nb_sockets',
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help: 'Number of connected sockets',
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labelNames: [ ]
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});
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this.nbClientsPerRoomGauge = new Gauge({
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name: 'workadventure_nb_clients_per_room',
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help: 'Number of clients per room',
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labelNames: [ 'room' ]
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});
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// Authentication with token. it will be decoded and stored in the socket.
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// Completely commented for now, as we do not use the "/login" route at all.
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this.Io.use((socket: Socket, next) => {
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console.log(socket.handshake.query.token);
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if (!socket.handshake.query || !socket.handshake.query.token) {
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console.error('An authentication error happened, a user tried to connect without a token.');
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return next(new Error('Authentication error'));
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}
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if(socket.handshake.query.token === 'test'){
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if (ALLOW_ARTILLERY) {
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(socket as ExSocketInterface).token = socket.handshake.query.token;
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(socket as ExSocketInterface).userId = this.nextUserId;
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(socket as ExSocketInterface).userUuid = uuid();
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this.nextUserId++;
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(socket as ExSocketInterface).isArtillery = true;
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console.log((socket as ExSocketInterface).userId);
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next();
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return;
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} else {
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console.warn("In order to perform a load-testing test on this environment, you must set the ALLOW_ARTILLERY environment variable to 'true'");
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next();
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}
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}
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(socket as ExSocketInterface).isArtillery = false;
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if(this.searchClientByToken(socket.handshake.query.token)){
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console.error('An authentication error happened, a user tried to connect while its token is already connected.');
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return next(new Error('Authentication error'));
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}
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Jwt.verify(socket.handshake.query.token, SECRET_KEY, (err: JsonWebTokenError, tokenDecoded: object) => {
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if (err) {
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console.error('An authentication error happened, invalid JsonWebToken.', err);
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return next(new Error('Authentication error'));
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}
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if (!this.isValidToken(tokenDecoded)) {
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return next(new Error('Authentication error, invalid token structure'));
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}
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(socket as ExSocketInterface).token = socket.handshake.query.token;
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(socket as ExSocketInterface).userId = this.nextUserId;
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(socket as ExSocketInterface).userUuid = tokenDecoded.userUuid;
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this.nextUserId++;
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next();
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});
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});
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this.ioConnection();
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}
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private isValidToken(token: object): token is TokenInterface {
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if (typeof((token as TokenInterface).userUuid) !== 'string') {
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return false;
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}
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if (typeof((token as TokenInterface).name) !== 'string') {
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return false;
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}
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return true;
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}
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/**
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*
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* @param token
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*/
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searchClientByToken(token: string): ExSocketInterface | null {
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const clients: ExSocketInterface[] = Object.values(this.Io.sockets.sockets) as ExSocketInterface[];
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for (let i = 0; i < clients.length; i++) {
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const client = clients[i];
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if (client.token !== token) {
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continue
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}
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return client;
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}
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return null;
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}
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ioConnection() {
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this.Io.on(SocketIoEvent.CONNECTION, (socket: Socket) => {
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const client : ExSocketInterface = socket as ExSocketInterface;
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client.batchedMessages = [];
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client.batchTimeout = null;
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client.emitInBatch = (event: string | symbol, payload: unknown): void => {
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emitInBatch(client, event, payload);
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}
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this.sockets.set(client.userId, client);
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// Let's log server load when a user joins
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const srvSockets = this.Io.sockets.sockets;
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this.nbClientsGauge.inc();
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console.log(new Date().toISOString() + ' A user joined (', Object.keys(srvSockets).length, ' connected users)');
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si.currentLoad().then(data => console.log(' Current load: ', data.avgload));
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si.currentLoad().then(data => console.log(' CPU: ', data.currentload, '%'));
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// End log server load
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/*join-rom event permit to join one room.
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message :
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userId : user identification
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roomId: room identification
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position: position of user in map
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x: user x position on map
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y: user y position on map
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*/
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socket.on(SocketIoEvent.JOIN_ROOM, (message: unknown, answerFn): void => {
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console.log(SocketIoEvent.JOIN_ROOM, message);
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try {
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if (!isJoinRoomMessageInterface(message)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid JOIN_ROOM message.'});
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console.warn('Invalid JOIN_ROOM message received: ', message);
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return;
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}
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const roomId = message.roomId;
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const Client = (socket as ExSocketInterface);
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if (Client.roomId === roomId) {
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return;
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}
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//leave previous room
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this.leaveRoom(Client);
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//join new previous room
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const world = this.joinRoom(Client, roomId, message.position);
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const things = world.setViewport(Client, message.viewport);
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const listOfUsers: Array<MessageUserPosition> = [];
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const listOfGroups: Array<GroupUpdateInterface> = [];
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for (const thing of things) {
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if (thing instanceof User) {
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const player: ExSocketInterface|undefined = this.sockets.get(thing.id);
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if (player === undefined) {
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console.warn('Something went wrong. The World contains a user "'+thing.id+"' but this user does not exist in the sockets list!");
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continue;
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}
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listOfUsers.push(new MessageUserPosition(thing.id, player.name, player.characterLayers, player.position));
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} else if (thing instanceof Group) {
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listOfGroups.push({
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groupId: thing.getId(),
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position: thing.getPosition(),
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});
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} else {
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console.error("Unexpected type for Movable returned by setViewport");
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}
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}
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const listOfItems: {[itemId: string]: unknown} = {};
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for (const [itemId, item] of world.getItemsState().entries()) {
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listOfItems[itemId] = item;
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}
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//console.warn('ANSWER PLAYER POSITIONS', listOfUsers);
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if (answerFn === undefined && ALLOW_ARTILLERY === true) {
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// For some reason, answerFn can be undefined if we use Artillery (?)
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return;
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}
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answerFn({
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users: listOfUsers,
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groups: listOfGroups,
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items: listOfItems
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});
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} catch (e) {
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console.error('An error occurred on "join_room" event');
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console.error(e);
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}
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});
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socket.on(SocketIoEvent.SET_VIEWPORT, (message: unknown): void => {
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try {
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//console.log('SET_VIEWPORT')
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if (!isViewport(message)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid SET_VIEWPORT message.'});
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console.warn('Invalid SET_VIEWPORT message received: ', message);
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return;
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}
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const Client = (socket as ExSocketInterface);
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Client.viewport = message;
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const world = this.Worlds.get(Client.roomId);
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if (!world) {
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console.error("In SET_VIEWPORT, could not find world with id '", Client.roomId, "'");
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return;
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}
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world.setViewport(Client, Client.viewport);
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} catch (e) {
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console.error('An error occurred on "SET_VIEWPORT" event');
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console.error(e);
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}
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});
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socket.on(SocketIoEvent.USER_POSITION, (message: unknown): void => {
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//console.log(SockerIoEvent.USER_POSITION, userMovesMessage);
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try {
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const userMovesMessage = UserMovesMessage.deserializeBinary(new Uint8Array(message as ArrayBuffer));
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const userMoves = userMovesMessage.toObject();
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const position = userMoves.position;
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if (position === undefined) {
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throw new Error('Position not found in message');
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}
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const viewport = userMoves.viewport;
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if (viewport === undefined) {
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throw new Error('Viewport not found in message');
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}
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let direction: string;
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switch (position.direction) {
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case Direction.UP:
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direction = 'up';
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break;
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case Direction.DOWN:
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direction = 'down';
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break;
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case Direction.LEFT:
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direction = 'left';
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break;
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case Direction.RIGHT:
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direction = 'right';
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break;
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}
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const Client = (socket as ExSocketInterface);
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// sending to all clients in room except sender
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Client.position = {
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x: position.x,
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y: position.y,
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direction,
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moving: position.moving,
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};
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Client.viewport = viewport;
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// update position in the world
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const world = this.Worlds.get(Client.roomId);
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if (!world) {
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console.error("In USER_POSITION, could not find world with id '", Client.roomId, "'");
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return;
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}
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world.updatePosition(Client, Client.position);
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world.setViewport(Client, Client.viewport);
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} catch (e) {
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console.error('An error occurred on "user_position" event');
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console.error(e);
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}
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});
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socket.on(SocketIoEvent.WEBRTC_SIGNAL, (data: unknown) => {
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this.emitVideo((socket as ExSocketInterface), data);
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});
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socket.on(SocketIoEvent.WEBRTC_SCREEN_SHARING_SIGNAL, (data: unknown) => {
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this.emitScreenSharing((socket as ExSocketInterface), data);
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});
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socket.on(SocketIoEvent.DISCONNECT, () => {
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const Client = (socket as ExSocketInterface);
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try {
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//leave room
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this.leaveRoom(Client);
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//leave webrtc room
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//socket.leave(Client.webRtcRoomId);
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//delete all socket information
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delete Client.webRtcRoomId;
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delete Client.roomId;
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delete Client.token;
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delete Client.position;
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} catch (e) {
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console.error('An error occurred on "disconnect"');
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console.error(e);
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}
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this.sockets.delete(Client.userId);
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// Let's log server load when a user leaves
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const srvSockets = this.Io.sockets.sockets;
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this.nbClientsGauge.dec();
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console.log('A user left (', Object.keys(srvSockets).length, ' connected users)');
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si.currentLoad().then(data => console.log('Current load: ', data.avgload));
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si.currentLoad().then(data => console.log('CPU: ', data.currentload, '%'));
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// End log server load
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});
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// Let's send the user id to the user
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socket.on(SocketIoEvent.SET_PLAYER_DETAILS, (message: any, answerFn) => {
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console.log(SocketIoEvent.SET_PLAYER_DETAILS, message);
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const playerDetailsMessage = SetPlayerDetailsMessage.deserializeBinary(new Uint8Array(message));
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const playerDetails = {
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name: playerDetailsMessage.getName(),
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characterLayers: playerDetailsMessage.getCharacterlayersList()
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};
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console.log(SocketIoEvent.SET_PLAYER_DETAILS, playerDetails);
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if (!isSetPlayerDetailsMessage(playerDetails)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid SET_PLAYER_DETAILS message.'});
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console.warn('Invalid SET_PLAYER_DETAILS message received: ', playerDetails);
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return;
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}
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const Client = (socket as ExSocketInterface);
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Client.name = playerDetails.name;
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Client.characterLayers = playerDetails.characterLayers;
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// Artillery fails when receiving an acknowledgement that is not a JSON object
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if (!Client.isArtillery) {
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answerFn(Client.userId);
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}
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});
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socket.on(SocketIoEvent.SET_SILENT, (silent: unknown) => {
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console.log(SocketIoEvent.SET_SILENT, silent);
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if (typeof silent !== "boolean") {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid SET_SILENT message.'});
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console.warn('Invalid SET_SILENT message received: ', silent);
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return;
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}
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try {
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const Client = (socket as ExSocketInterface);
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// update position in the world
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const world = this.Worlds.get(Client.roomId);
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if (!world) {
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console.error("In SET_SILENT, could not find world with id '", Client.roomId, "'");
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return;
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}
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world.setSilent(Client, silent);
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} catch (e) {
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console.error('An error occurred on "SET_SILENT"');
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console.error(e);
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}
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});
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socket.on(SocketIoEvent.ITEM_EVENT, (itemEvent: unknown) => {
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if (!isItemEventMessageInterface(itemEvent)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid ITEM_EVENT message.'});
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console.warn('Invalid ITEM_EVENT message received: ', itemEvent);
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return;
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}
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try {
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const Client = (socket as ExSocketInterface);
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socket.to(Client.roomId).emit(SocketIoEvent.ITEM_EVENT, itemEvent);
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const world = this.Worlds.get(Client.roomId);
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if (!world) {
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console.error("Could not find world with id '", Client.roomId, "'");
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return;
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}
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world.setItemState(itemEvent.itemId, itemEvent.state);
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} catch (e) {
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console.error('An error occurred on "item_event"');
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console.error(e);
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}
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});
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});
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}
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emitVideo(socket: ExSocketInterface, data: unknown){
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if (!isWebRtcSignalMessageInterface(data)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid WEBRTC_SIGNAL message.'});
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console.warn('Invalid WEBRTC_SIGNAL message received: ', data);
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return;
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}
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//send only at user
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const client = this.sockets.get(data.receiverId);
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if (client === undefined) {
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console.warn("While exchanging a WebRTC signal: client with id ", data.receiverId, " does not exist. This might be a race condition.");
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return;
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}
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return client.emit(SocketIoEvent.WEBRTC_SIGNAL, {
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userId: socket.userId,
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signal: data.signal
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});
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}
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emitScreenSharing(socket: ExSocketInterface, data: unknown){
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if (!isWebRtcSignalMessageInterface(data)) {
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socket.emit(SocketIoEvent.MESSAGE_ERROR, {message: 'Invalid WEBRTC_SCREEN_SHARING message.'});
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console.warn('Invalid WEBRTC_SCREEN_SHARING message received: ', data);
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return;
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}
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//send only at user
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const client = this.sockets.get(data.receiverId);
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if (client === undefined) {
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console.warn("While exchanging a WEBRTC_SCREEN_SHARING signal: client with id ", data.receiverId, " does not exist. This might be a race condition.");
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return;
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}
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return client.emit(SocketIoEvent.WEBRTC_SCREEN_SHARING_SIGNAL, {
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userId: socket.userId,
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signal: data.signal
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});
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}
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searchClientByIdOrFail(userId: number): ExSocketInterface {
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const client: ExSocketInterface|undefined = this.sockets.get(userId);
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if (client === undefined) {
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throw new Error("Could not find user with id " + userId);
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}
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return client;
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}
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leaveRoom(Client : ExSocketInterface){
|
|
// leave previous room and world
|
|
if(Client.roomId){
|
|
try {
|
|
//user leave previous world
|
|
const world: World | undefined = this.Worlds.get(Client.roomId);
|
|
if (world) {
|
|
world.leave(Client);
|
|
if (world.isEmpty()) {
|
|
this.Worlds.delete(Client.roomId);
|
|
}
|
|
}
|
|
//user leave previous room
|
|
Client.leave(Client.roomId);
|
|
} finally {
|
|
this.nbClientsPerRoomGauge.dec({ room: Client.roomId });
|
|
delete Client.roomId;
|
|
}
|
|
}
|
|
}
|
|
|
|
private joinRoom(Client : ExSocketInterface, roomId: string, position: PointInterface): World {
|
|
//join user in room
|
|
Client.join(roomId);
|
|
this.nbClientsPerRoomGauge.inc({ room: roomId });
|
|
Client.roomId = roomId;
|
|
Client.position = position;
|
|
|
|
//check and create new world for a room
|
|
let world = this.Worlds.get(roomId)
|
|
if(world === undefined){
|
|
world = new World((user1: number, group: Group) => {
|
|
this.connectedUser(user1, group);
|
|
}, (user1: number, group: Group) => {
|
|
this.disConnectedUser(user1, group);
|
|
}, MINIMUM_DISTANCE, GROUP_RADIUS, (thing: Movable, listener: User) => {
|
|
const clientListener = this.searchClientByIdOrFail(listener.id);
|
|
if (thing instanceof User) {
|
|
const clientUser = this.searchClientByIdOrFail(thing.id);
|
|
const messageUserJoined = new MessageUserJoined(clientUser.userId, clientUser.name, clientUser.characterLayers, clientUser.position);
|
|
|
|
clientListener.emit(SocketIoEvent.JOIN_ROOM, messageUserJoined);
|
|
} else if (thing instanceof Group) {
|
|
clientListener.emit(SocketIoEvent.GROUP_CREATE_UPDATE, {
|
|
position: thing.getPosition(),
|
|
groupId: thing.getId()
|
|
} as GroupUpdateInterface);
|
|
} else {
|
|
console.error('Unexpected type for Movable.');
|
|
}
|
|
}, (thing: Movable, position, listener) => {
|
|
const clientListener = this.searchClientByIdOrFail(listener.id);
|
|
if (thing instanceof User) {
|
|
const clientUser = this.searchClientByIdOrFail(thing.id);
|
|
|
|
clientListener.emitInBatch(SocketIoEvent.USER_MOVED, new MessageUserMoved(clientUser.userId, clientUser.position));
|
|
//console.log("Sending USER_MOVED event");
|
|
} else if (thing instanceof Group) {
|
|
clientListener.emit(SocketIoEvent.GROUP_CREATE_UPDATE, {
|
|
position: thing.getPosition(),
|
|
groupId: thing.getId()
|
|
} as GroupUpdateInterface);
|
|
} else {
|
|
console.error('Unexpected type for Movable.');
|
|
}
|
|
}, (thing: Movable, listener) => {
|
|
const clientListener = this.searchClientByIdOrFail(listener.id);
|
|
if (thing instanceof User) {
|
|
const clientUser = this.searchClientByIdOrFail(thing.id);
|
|
clientListener.emit(SocketIoEvent.USER_LEFT, clientUser.userId);
|
|
//console.log("Sending USER_LEFT event");
|
|
} else if (thing instanceof Group) {
|
|
clientListener.emit(SocketIoEvent.GROUP_DELETE, thing.getId());
|
|
} else {
|
|
console.error('Unexpected type for Movable.');
|
|
}
|
|
|
|
});
|
|
this.Worlds.set(roomId, world);
|
|
}
|
|
|
|
// Dispatch groups position to newly connected user
|
|
world.getGroups().forEach((group: Group) => {
|
|
Client.emit(SocketIoEvent.GROUP_CREATE_UPDATE, {
|
|
position: group.getPosition(),
|
|
groupId: group.getId()
|
|
} as GroupUpdateInterface);
|
|
});
|
|
//join world
|
|
world.join(Client, Client.position);
|
|
return world;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param socket
|
|
* @param roomId
|
|
*/
|
|
joinWebRtcRoom(socket: ExSocketInterface, roomId: string) {
|
|
if (socket.webRtcRoomId === roomId) {
|
|
return;
|
|
}
|
|
socket.join(roomId);
|
|
socket.webRtcRoomId = roomId;
|
|
//if two persons in room share
|
|
if (this.Io.sockets.adapter.rooms[roomId].length < 2 /*|| this.Io.sockets.adapter.rooms[roomId].length >= 4*/) {
|
|
return;
|
|
}
|
|
|
|
// TODO: scanning all sockets is maybe not the most efficient
|
|
const clients: Array<ExSocketInterface> = (Object.values(this.Io.sockets.sockets) as Array<ExSocketInterface>)
|
|
.filter((client: ExSocketInterface) => client.webRtcRoomId && client.webRtcRoomId === roomId);
|
|
//send start at one client to initialise offer webrtc
|
|
//send all users in room to create PeerConnection in front
|
|
clients.forEach((client: ExSocketInterface, index: number) => {
|
|
|
|
const peerClients = clients.reduce((tabs: Array<UserInGroupInterface>, clientId: ExSocketInterface, indexClientId: number) => {
|
|
if (!clientId.userId || clientId.userId === client.userId) {
|
|
return tabs;
|
|
}
|
|
tabs.push({
|
|
userId: clientId.userId,
|
|
name: clientId.name,
|
|
initiator: index <= indexClientId
|
|
});
|
|
return tabs;
|
|
}, []);
|
|
|
|
client.emit(SocketIoEvent.WEBRTC_START, {clients: peerClients, roomId: roomId});
|
|
});
|
|
}
|
|
|
|
/** permit to share user position
|
|
** users position will send in event 'user-position'
|
|
** The data sent is an array with information for each user :
|
|
[
|
|
{
|
|
userId: <string>,
|
|
roomId: <string>,
|
|
position: {
|
|
x : <number>,
|
|
y : <number>,
|
|
direction: <string>
|
|
}
|
|
},
|
|
...
|
|
]
|
|
**/
|
|
|
|
//connected user
|
|
connectedUser(userId: number, group: Group) {
|
|
/*let Client = this.sockets.get(userId);
|
|
if (Client === undefined) {
|
|
return;
|
|
}*/
|
|
const Client = this.searchClientByIdOrFail(userId);
|
|
this.joinWebRtcRoom(Client, "webrtcroom"+group.getId());
|
|
}
|
|
|
|
//disconnect user
|
|
disConnectedUser(userId: number, group: Group) {
|
|
const Client = this.searchClientByIdOrFail(userId);
|
|
Client.to("webrtcroom"+group.getId()).emit(SocketIoEvent.WEBRTC_DISCONNECT, {
|
|
userId: userId
|
|
});
|
|
|
|
// Most of the time, sending a disconnect event to one of the players is enough (the player will close the connection
|
|
// which will be shut for the other player).
|
|
// However! In the rare case where the WebRTC connection is not yet established, if we close the connection on one of the player,
|
|
// the other player will try connecting until a timeout happens (during this time, the connection icon will be displayed for nothing).
|
|
// So we also send the disconnect event to the other player.
|
|
for (const user of group.getUsers()) {
|
|
Client.emit(SocketIoEvent.WEBRTC_DISCONNECT, {
|
|
userId: user.id
|
|
});
|
|
}
|
|
|
|
//disconnect webrtc room
|
|
if(!Client.webRtcRoomId){
|
|
return;
|
|
}
|
|
Client.leave(Client.webRtcRoomId);
|
|
delete Client.webRtcRoomId;
|
|
}
|
|
}
|