david_bai
18f6703c6b
- Attempt reconnection on 'disconnected' | 'failed' | 'closed' states (BaseWebRTC) - Relax gating: rejoin when roomId exists and any of isPeerDisconnected, isSocketDisconnected, or socketId changed - Auto re-join room on socket 'connect' if lastJoinedSocketId differs or not in room; send initiator-online for initiators - Track lastJoinedSocketId after successful join and reset isInRoom when socketId changes to bypass early-return - Update flows to document mobile background/foreground reconnection and socketId-based rejoin
686 lines
24 KiB
TypeScript
686 lines
24 KiB
TypeScript
// BaseWebRTC.js
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import io, { Socket, ManagerOptions, SocketOptions } from "socket.io-client";
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import { WakeLockManager } from "./wakeLockManager";
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import { postLogToBackend } from "@/app/config/api";
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const developmentEnv = process.env.NODE_ENV; // Development environment
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export class WebRTCError extends Error {
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constructor(message: string, public context?: Record<string, any>) {
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super(message);
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this.name = "WebRTCError";
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}
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}
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interface JoinRoomResponse {
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success: boolean;
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message: string;
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roomId: string;
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error?: string;
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}
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interface CallbackTypes {
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onDataChannelOpen?: (peerId: string) => void;
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onDataReceived?: (data: string | ArrayBuffer, peerId: string) => void;
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onConnectionEstablished?: (peerId: string) => void;
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onConnectionStateChange?: (
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state: RTCPeerConnectionState,
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peerId: string
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) => void;
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onPeerDisconnected?: (peerId: string) => void;
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onError?: (error: WebRTCError) => void;
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}
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export interface WebRTCConfig {
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iceServers: RTCIceServer[];
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socketOptions: Partial<ManagerOptions & SocketOptions>;
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signalingServer: string; // The URL of the signaling server for initializing the Socket.IO connection.
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}
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export default class BaseWebRTC {
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// Type declarations
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protected iceServers: RTCIceServer[];
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protected socket: Socket;
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public peerConnections: Map<string, RTCPeerConnection>;
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public dataChannels: Map<string, RTCDataChannel>;
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public onDataChannelOpen: CallbackTypes["onDataChannelOpen"] | null;
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public onDataReceived: CallbackTypes["onDataReceived"] | null;
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public onConnectionEstablished:
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| CallbackTypes["onConnectionEstablished"]
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| null;
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public onConnectionStateChange:
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| CallbackTypes["onConnectionStateChange"]
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| null;
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public onPeerDisconnected: CallbackTypes["onPeerDisconnected"] | null;
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public onError: CallbackTypes["onError"] | null;
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protected iceCandidatesQueue: Map<string, RTCIceCandidateInit[]>;
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public roomId: string | null;
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public peerId: string | undefined | null;
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public isInRoom: boolean;
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protected isInitiator: boolean; // Flag for the initiator
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// Reconnection related
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protected isSocketDisconnected: boolean; // Tracks socket connection status
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protected isPeerDisconnected: boolean; // Tracks P2P connection status
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protected reconnectionInProgress: boolean; // Prevents duplicate reconnections
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protected wakeLockManager: WakeLockManager;
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// Graceful disconnect tracking
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protected gracefullyDisconnectedPeers: Set<string>;
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// Track last socket.id used to successfully join a room
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protected lastJoinedSocketId: string | null;
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constructor(config: WebRTCConfig) {
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this.iceServers = config.iceServers;
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this.socket = io(config.signalingServer, config.socketOptions);
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this.peerConnections = new Map(); // Map<targetPeerId, RTCPeerConnection>
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this.dataChannels = new Map(); // Map<targetPeerId, RTCDataChannel>
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// Callbacks
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this.onDataChannelOpen = null; // Callback for when the data channel is established
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this.onDataReceived = null; // Callback for receiving data
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this.onConnectionEstablished = null; // Triggered when the WebRTC connection is established
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this.onConnectionStateChange = null; // Monitors and responds to connection state changes
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this.onPeerDisconnected = null;
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this.onError = null;
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this.iceCandidatesQueue = new Map(); // Stores ICE candidates for each peer
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this.roomId = null;
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this.peerId = null; // Own ID
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this.isInRoom = false; // Whether the user has already joined a room
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this.gracefullyDisconnectedPeers = new Set(); // Track peers that disconnected gracefully
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this.setupCommonSocketListeners();
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this.isInitiator = false;
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this.isSocketDisconnected = false;
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this.isPeerDisconnected = false;
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this.reconnectionInProgress = false;
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this.wakeLockManager = new WakeLockManager();
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this.lastJoinedSocketId = null;
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}
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// region Logging and Error Handling
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protected log(
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level: "log" | "warn" | "error",
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message: string,
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...args: any[]
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) {
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const prefix = `[${this.constructor.name}]`;
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console[level](prefix, message, ...args);
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}
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public fireError(message: string, context?: Record<string, any>) {
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const error = new WebRTCError(message, context);
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this.log("error", message, context);
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this.onError?.(error);
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}
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// endregion
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// Sets up event listeners for the signaling server to handle various signaling messages (connection, ICE candidates, offer, answer, etc.).
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setupCommonSocketListeners() {
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this.socket.on("connect", async () => {
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this.peerId = this.socket.id; // Save own ID
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this.isSocketDisconnected = false;
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this.log("log", `Connected to signaling server, peerId: ${this.peerId}`);
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// Auto re-join if we previously joined a room but socket.id changed
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const hasRoom = !!this.roomId;
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const currentSocketId = this.socket.id ?? null;
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const socketIdChanged =
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this.lastJoinedSocketId !== null &&
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this.lastJoinedSocketId !== currentSocketId;
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if (hasRoom && (socketIdChanged || !this.isInRoom)) {
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// Ensure joinRoom does not early-return
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if (socketIdChanged) this.isInRoom = false;
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if (!this.reconnectionInProgress) {
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this.reconnectionInProgress = true;
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try {
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const sendInitiatorOnline = this.isInitiator;
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await this.joinRoom(
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this.roomId as string,
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this.isInitiator,
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sendInitiatorOnline
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);
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// Reset flags after successful auto rejoin
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this.isSocketDisconnected = false;
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this.isPeerDisconnected = false;
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} catch (error) {
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this.fireError("Auto rejoin on socket connect failed", { error });
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} finally {
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this.reconnectionInProgress = false;
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}
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}
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}
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});
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this.socket.on("error", (error) => {
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this.fireError("Socket error", { error });
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});
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this.socket.on("ice-candidate", ({ candidate, peerId, from }) => {
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// Recipient's peerId
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// console.log(`Received ICE candidate from ${from} for ${peerId}`);
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this.handleIceCandidate({ candidate, peerId, from });
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});
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// Add listener for socket disconnection
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this.socket.on("disconnect", () => {
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this.isInRoom = false;
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this.isSocketDisconnected = true;
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if (developmentEnv === "development")
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postLogToBackend(
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`${this.peerId} disconnect on socket,isInitiator:${this.isInitiator},isInRoom:${this.isInRoom}`
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);
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// Attempt to reconnect. On mobile, switching to the background disconnects both P2P and socket connections.
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// The disconnect code executes upon returning, so reconnect directly here; send a new signal to start reconnection.
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this.attemptReconnection();
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});
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this.socket.on("peer-disconnected", ({ peerId }) => {
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this.log("log", `Peer ${peerId} has disconnected.`);
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this.onPeerDisconnected?.(peerId);
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// We can also clean up the connection here if needed
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this.cleanupExistingConnection(peerId);
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});
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}
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protected async attemptReconnection(): Promise<void> {
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if (this.reconnectionInProgress) return;
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if (!this.roomId) return;
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const currentSocketId = this.socket.id ?? null;
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const socketIdChanged =
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this.lastJoinedSocketId !== null &&
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this.lastJoinedSocketId !== currentSocketId;
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// Widen condition: if either side disconnected or socketId changed, try to rejoin
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if (this.isPeerDisconnected || this.isSocketDisconnected || socketIdChanged) {
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this.reconnectionInProgress = true;
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if (developmentEnv === "development") {
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postLogToBackend(
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`Starting reconnection. socketDisc:${this.isSocketDisconnected}, peerDisc:${this.isPeerDisconnected}, socketIdChanged:${socketIdChanged}, isInitiator:${this.isInitiator}`
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);
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}
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try {
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// Ensure joinRoom does not early-return
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if (socketIdChanged) this.isInRoom = false;
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const sendInitiatorOnline = this.isInitiator;
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await this.joinRoom(this.roomId, this.isInitiator, sendInitiatorOnline);
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// Reset states
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this.isSocketDisconnected = false;
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this.isPeerDisconnected = false;
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} catch (error) {
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this.fireError("Reconnection failed", { error });
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} finally {
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this.reconnectionInProgress = false;
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}
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}
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}
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protected async handleIceCandidate({
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candidate,
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peerId,
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from,
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}: {
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candidate: RTCIceCandidateInit;
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peerId: string;
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from: string;
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}): Promise<void> {
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// this.log('log',`Handling ICE candidate from ${from} for ${peerId}`);
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const peerConnection = this.peerConnections.get(from);
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// this.log('log',`this.peerConnections`,this.peerConnections);
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if (!peerConnection) {
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// this.log('warn',`No peer connection found for ${from}, queuing candidate`);
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if (!this.iceCandidatesQueue.has(from)) {
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this.iceCandidatesQueue.set(from, []);
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}
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this.iceCandidatesQueue.get(from)?.push(candidate);
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return;
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}
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try {
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// Only add ICE candidates if the remote description is set and the connection is not closed
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if (
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peerConnection.remoteDescription &&
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peerConnection.signalingState !== "closed" &&
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peerConnection.connectionState !== "closed"
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) {
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await peerConnection.addIceCandidate(new RTCIceCandidate(candidate));
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// this.log('log',`Successfully added ICE candidate for ${from}`);
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} else {
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// this.log('warn',`Remote description not set or connection closed for ${from}, queuing candidate`);
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// this.log('warn',`remoteDescription`,peerConnection.remoteDescription,'peerConnection.signalingState',peerConnection.signalingState);
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if (!this.iceCandidatesQueue.has(from)) {
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this.iceCandidatesQueue.set(from, []);
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}
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this.iceCandidatesQueue.get(from)?.push(candidate);
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}
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} catch (e) {
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this.fireError(`Error adding ICE candidate for ${from}`, { error: e });
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// If adding fails, also add it to the queue
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if (!this.iceCandidatesQueue.has(from)) {
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this.iceCandidatesQueue.set(from, []);
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}
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this.iceCandidatesQueue.get(from)?.push(candidate);
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}
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}
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protected async addQueuedIceCandidates(peerId: string): Promise<void> {
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const candidates = this.iceCandidatesQueue.get(peerId);
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const peerConnection = this.peerConnections.get(peerId);
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if (!peerConnection || !candidates?.length) {
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return;
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}
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if (
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peerConnection.remoteDescription &&
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peerConnection.signalingState !== "closed" &&
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peerConnection.connectionState !== "closed"
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) {
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// this.log('log',`Adding ${candidates.length} queued candidates for ${peerId}`);
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for (const candidate of candidates) {
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try {
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await peerConnection.addIceCandidate(new RTCIceCandidate(candidate));
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// this.log('log',`Successfully added queued candidate for ${peerId}`);
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} catch (e) {
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this.fireError("Error adding queued ice candidates", {
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error: e,
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peerId,
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});
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}
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}
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// Only clear the queue after successfully adding all candidates
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this.iceCandidatesQueue.delete(peerId);
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} else {
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this.log(
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"warn",
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`Connection not ready for ${peerId}, keeping candidates queued`
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);
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// this.log('warn',`remoteDescription`,peerConnection?.remoteDescription);
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}
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}
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protected async createPeerConnection(
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peerId: string
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): Promise<RTCPeerConnection> {
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// this.log('log','Creating peer connection for:', peerId);
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const peerConnection = this.peerConnections.get(peerId);
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if (peerConnection) {
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// this.log('log','Reusing existing peer connection for:', peerId);
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return Promise.resolve(peerConnection);
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}
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// WebRTC provides strong encryption by default. It's necessary to switch to the HTTPS protocol upon deployment.
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const newPeerConnection = new RTCPeerConnection({
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iceServers: this.iceServers,
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});
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newPeerConnection.onconnectionstatechange = () => {
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// const state = newPeerConnection.connectionState;
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// this.log('log',`Connection State (${peerId}):`, state);
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this.handleConnectionStateChange(peerId, newPeerConnection);
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};
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// Improve ICE candidate handling
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newPeerConnection.onicecandidate = (event) => {
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if (event.candidate) {
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// this.log('log',`Sending ICE candidate to ${peerId}:`, event.candidate);
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this.socket.emit("ice-candidate", {
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candidate: event.candidate,
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peerId: peerId,
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from: this.socket.id, // Add sender ID
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});
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}
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};
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this.peerConnections.set(peerId, newPeerConnection);
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// this.log('log','New peer connection created for:', peerId);
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return Promise.resolve(newPeerConnection);
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}
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protected handleConnectionStateChange(
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peerId: string,
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peerConnection: RTCPeerConnection
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): void {
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const state = peerConnection.connectionState;
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// this.log('log','Connection state change:', state);
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const stateHandlers = {
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connected: async () => {
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this.isPeerDisconnected = false;
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const dataChannel = this.dataChannels.get(peerId);
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if (!dataChannel) {
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this.createDataChannel(peerId);
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}
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this.onConnectionEstablished?.(peerId);
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// Request wake lock when connection is established
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await this.wakeLockManager.requestWakeLock();
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},
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disconnected: async () => {
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await this.cleanupExistingConnection(peerId);
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this.isPeerDisconnected = true;
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if (developmentEnv === "development")
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postLogToBackend(`p2p disconnected, isInitiator:${this.isInitiator}`);
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// Attempt to reconnect
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this.attemptReconnection();
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await this.wakeLockManager.releaseWakeLock();
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},
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failed: async () => {
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this.cleanupExistingConnection(peerId);
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this.isPeerDisconnected = true;
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// Attempt to reconnect as well when failed
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this.attemptReconnection();
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await this.wakeLockManager.releaseWakeLock();
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},
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closed: async () => {
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this.cleanupExistingConnection(peerId);
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this.isPeerDisconnected = true;
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// Attempt to reconnect when closed
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this.attemptReconnection();
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await this.wakeLockManager.releaseWakeLock();
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},
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// The following must be added to prevent errors
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connecting: () => {
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this.log("log", "Peer is connecting");
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},
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new: () => {
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this.log("log", "New connection state");
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},
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};
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stateHandlers[state]?.();
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this.onConnectionStateChange?.(state, peerId);
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}
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protected setupDataChannel(
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dataChannel: RTCDataChannel,
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peerId: string
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): void {
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dataChannel.onopen = () => {
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// this.log('log',`Data channel opened for peer ${peerId}`);
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setTimeout(() => {
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this.onDataChannelOpen?.(peerId);
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}, 50);
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};
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dataChannel.onmessage = (event) => {
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// Enhanced data type detection - supports multiple binary data formats in Firefox
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let dataType = "Unknown";
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let dataSize = 0;
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if (typeof event.data === "string") {
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dataType = "String";
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dataSize = event.data.length;
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} else if (event.data instanceof ArrayBuffer) {
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dataType = "ArrayBuffer";
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dataSize = event.data.byteLength;
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} else if (event.data instanceof Blob) {
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dataType = "Blob";
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dataSize = event.data.size;
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} else if (event.data instanceof Uint8Array) {
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dataType = "Uint8Array";
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dataSize = event.data.byteLength;
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} else if (ArrayBuffer.isView(event.data)) {
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dataType = "TypedArray";
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dataSize = event.data.byteLength;
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} else {
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// Detailed unknown type debug information
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dataType = `Unknown(${Object.prototype.toString.call(event.data)})`;
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dataSize =
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event.data?.length || event.data?.size || event.data?.byteLength || 0;
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}
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if (this.onDataReceived) {
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this.onDataReceived(event.data, peerId);
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}
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};
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dataChannel.onerror = (error) => {
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// Check if this is a user-initiated disconnect (not a real error)
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// The error parameter is an Event object, not an Error object
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const errorTarget = error.target as RTCDataChannel;
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const isUserDisconnect =
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errorTarget?.readyState === "closed" ||
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error.type === "error";
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if (isUserDisconnect) {
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this.log("log", `Data channel closed by user for peer ${peerId}`, {
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error,
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});
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} else {
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this.log("error", `Data channel error for peer ${peerId}`, { error });
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}
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};
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dataChannel.onclose = () => {
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if (developmentEnv === "development") {
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postLogToBackend(`DataChannel closed for peer: ${peerId}`);
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}
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this.log("log", `Data channel with ${peerId} closed.`);
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};
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}
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// Join a room. sendInitiatorOnline indicates whether to send "initiator online" message after joining.
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public async joinRoom(
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roomId: string,
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isInitiator: boolean,
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sendInitiatorOnline: boolean = false
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): Promise<void> {
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// If already in the room, return directly
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if (this.isInRoom) {
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return;
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}
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this.isInitiator = isInitiator;
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return new Promise<void>((resolve, reject) => {
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// Set timeout (5 seconds)
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const timeout = setTimeout(() => {
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this.socket.off("joinResponse");
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reject(new Error("Join room timeout"));
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this.isInRoom = false;
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this.roomId = null;
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}, 5000);
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// Listen for join room response -- once
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this.socket.once("joinResponse", (response: JoinRoomResponse) => {
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clearTimeout(timeout); // Clear timeout timer
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if (response.success) {
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this.roomId = roomId;
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this.isInRoom = true;
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// Record the socket.id used for this successful join
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this.lastJoinedSocketId = this.socket.id ?? null;
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if (sendInitiatorOnline) {
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this.socket.emit("initiator-online", {
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roomId: this.roomId,
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});
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}
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if (developmentEnv === "development")
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postLogToBackend(
|
|
`peerId:${this.socket.id} Successfully joined room: ${response.roomId},isInitiator:${this.isInitiator},isInRoom:${this.isInRoom}`
|
|
);
|
|
resolve();
|
|
} else {
|
|
this.isInRoom = false;
|
|
this.roomId = null;
|
|
if (developmentEnv === "development")
|
|
postLogToBackend(`Failed to join room,message:${response.message}`);
|
|
this.fireError("Failed to join room", { message: response.message });
|
|
reject(new Error(response.message));
|
|
}
|
|
});
|
|
|
|
// Send join room request
|
|
try {
|
|
this.socket.emit("join", { roomId });
|
|
} catch (error) {
|
|
clearTimeout(timeout);
|
|
this.isInRoom = false;
|
|
this.roomId = null;
|
|
reject(error);
|
|
}
|
|
});
|
|
}
|
|
// If peerId is specified, send to a specific recipient, otherwise broadcast
|
|
public sendData(data: any, peerId?: string | null): boolean {
|
|
if (peerId) {
|
|
return this.sendToPeer(data, peerId);
|
|
} else {
|
|
let success = true;
|
|
for (const peerId of Object.keys(this.dataChannels)) {
|
|
if (!this.sendToPeer(data, peerId)) {
|
|
success = false;
|
|
}
|
|
}
|
|
return success;
|
|
}
|
|
}
|
|
// Send to a specific peer
|
|
public sendToPeer(data: any, peerId: string): boolean {
|
|
const dataChannel = this.dataChannels.get(peerId);
|
|
if (dataChannel?.readyState === "open") {
|
|
try {
|
|
// Firefox compatibility debugging: Log sending details
|
|
const _dataType =
|
|
typeof data === "string"
|
|
? "string"
|
|
: data instanceof ArrayBuffer
|
|
? "ArrayBuffer"
|
|
: typeof data;
|
|
const _dataSize =
|
|
typeof data === "string"
|
|
? data.length
|
|
: data instanceof ArrayBuffer
|
|
? data.byteLength
|
|
: 0;
|
|
|
|
// if (developmentEnv === "development")
|
|
// postLogToBackend(
|
|
// `sendToPeer - type: ${dataType}, size: ${dataSize}, bufferedAmount: ${dataChannel.bufferedAmount}`
|
|
// );
|
|
|
|
dataChannel.send(data);
|
|
return true;
|
|
} catch (error) {
|
|
postLogToBackend(`sendToPeer error: ${error}`);
|
|
this.log("error", `Error sending data to peer ${peerId}`, { error });
|
|
return false;
|
|
}
|
|
}
|
|
|
|
postLogToBackend(
|
|
`DataChannel not ready - peerId: ${peerId}, state: ${
|
|
dataChannel?.readyState || "undefined"
|
|
}`
|
|
);
|
|
this.log("warn", `Data channel not ready for peer ${peerId}. Retrying...`);
|
|
return this.retryDataSend(data, peerId);
|
|
}
|
|
|
|
protected retryDataSend(data: any, peerId: string): boolean {
|
|
// Check if peer has gracefully disconnected - no need to retry
|
|
if (this.gracefullyDisconnectedPeers.has(peerId)) {
|
|
this.log(
|
|
"log",
|
|
`Peer ${peerId} has gracefully disconnected, skipping retry`
|
|
);
|
|
return false;
|
|
}
|
|
|
|
const maxRetries = 5;
|
|
let retryCount = 0;
|
|
let ret = false;
|
|
|
|
const attemptSend = () => {
|
|
// Check again in case peer disconnected during retry
|
|
if (this.gracefullyDisconnectedPeers.has(peerId)) {
|
|
this.log(
|
|
"log",
|
|
`Peer ${peerId} gracefully disconnected during retry, stopping`
|
|
);
|
|
return;
|
|
}
|
|
|
|
const dataChannel = this.dataChannels.get(peerId);
|
|
if (dataChannel?.readyState === "open") {
|
|
dataChannel.send(data);
|
|
ret = true;
|
|
} else if (retryCount < maxRetries) {
|
|
retryCount++;
|
|
this.log(
|
|
"log",
|
|
`Retrying to send data to peer ${peerId}. Attempt ${retryCount} of ${maxRetries}`
|
|
);
|
|
setTimeout(attemptSend, 1000);
|
|
} else {
|
|
this.fireError(
|
|
`Failed to send data to peer ${peerId} after maximum retries`
|
|
);
|
|
}
|
|
};
|
|
|
|
setTimeout(attemptSend, 100);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Mark a peer as gracefully disconnected to prevent unnecessary retries
|
|
*/
|
|
public markPeerGracefullyDisconnected(peerId: string): void {
|
|
this.gracefullyDisconnectedPeers.add(peerId);
|
|
this.log("log", `Marked peer ${peerId} as gracefully disconnected`);
|
|
}
|
|
|
|
protected async closeDataChannel(peerId: string): Promise<void> {
|
|
const dataChannel = this.dataChannels.get(peerId);
|
|
if (dataChannel) {
|
|
dataChannel.close();
|
|
this.dataChannels.delete(peerId);
|
|
}
|
|
}
|
|
|
|
protected async cleanupExistingConnection(peerId: string): Promise<void> {
|
|
this.closeDataChannel(peerId);
|
|
|
|
const peerConnection = this.peerConnections.get(peerId);
|
|
if (peerConnection) {
|
|
peerConnection.close();
|
|
this.peerConnections.delete(peerId);
|
|
}
|
|
|
|
this.iceCandidatesQueue.delete(peerId);
|
|
}
|
|
|
|
public async cleanUpBeforeExit() {
|
|
for (const peerId of Object.keys(this.peerConnections)) {
|
|
this.cleanupExistingConnection(peerId);
|
|
}
|
|
if (this.socket) {
|
|
this.socket.disconnect();
|
|
}
|
|
this.isInRoom = false;
|
|
}
|
|
|
|
// Public method to leave room and cleanup connections while keeping socket alive
|
|
public async leaveRoomAndCleanup(): Promise<void> {
|
|
// Clean up all peer connections
|
|
for (const peerId of Array.from(this.peerConnections.keys())) {
|
|
await this.cleanupExistingConnection(peerId);
|
|
}
|
|
|
|
// Reset room-related state but keep socket connected
|
|
this.isInRoom = false;
|
|
this.roomId = null;
|
|
this.isInitiator = false;
|
|
this.isPeerDisconnected = false;
|
|
this.isSocketDisconnected = false;
|
|
this.reconnectionInProgress = false;
|
|
this.gracefullyDisconnectedPeers.clear(); // Clear graceful disconnect tracking
|
|
|
|
this.log(
|
|
"log",
|
|
"Left room and cleaned up connections, socket remains connected"
|
|
);
|
|
}
|
|
// Abstract method declaration
|
|
protected createDataChannel(_peerId: string) {
|
|
throw new Error("createDataChannel must be implemented by subclass");
|
|
}
|
|
}
|