première version avec socketio
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168
websocket-adapter.js
Normal file
168
websocket-adapter.js
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/**
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* Adaptateur WebSocket pour fallback quand SignalR n'est pas disponible
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* Émule l'API SignalR avec SocketIO
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*/
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const io = require('socket.io-client');
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class WebSocketAdapter {
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constructor(serverUrl, options = {}) {
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// Nettoyer l'URL et s'assurer qu'elle est valide
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this.serverUrl = serverUrl;
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if (this.serverUrl.includes('/signalR')) {
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this.serverUrl = this.serverUrl.replace('/signalR', '');
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}
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// S'assurer qu'on a le protocole
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if (!this.serverUrl.startsWith('http://') && !this.serverUrl.startsWith('https://')) {
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this.serverUrl = `http://${this.serverUrl}`;
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}
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this.socket = null;
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this.connected = false;
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this.handlers = new Map();
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this.options = options;
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this.pendingInvocations = new Map();
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this.invocationId = 0;
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}
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/**
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* Émule connection.start() de SignalR
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*/
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async start() {
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return new Promise((resolve, reject) => {
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console.log(`🔄 Connexion WebSocket à ${this.serverUrl}...`);
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// Se connecter avec SocketIO
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this.socket = io(this.serverUrl, {
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transports: ['websocket'],
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reconnection: true,
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reconnectionAttempts: 5,
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reconnectionDelay: 2000,
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...this.options
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});
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this.socket.on('connect', () => {
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console.log('✅ WebSocket connecté (mode fallback)');
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this.connected = true;
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// Émuler l'événement 'connected' de SignalR
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if (this.handlers.has('connected')) {
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this.handlers.get('connected')({ connectionId: this.socket.id });
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}
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resolve();
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});
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this.socket.on('connect_error', (error) => {
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console.error('❌ Erreur connexion WebSocket:', error.message);
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reject(error);
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});
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this.socket.on('disconnect', (reason) => {
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console.log('🔌 WebSocket déconnecté:', reason);
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this.connected = false;
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});
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// Timeout de connexion
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setTimeout(() => {
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if (!this.connected) {
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reject(new Error('Timeout de connexion WebSocket'));
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}
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}, 10000);
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});
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}
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/**
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* Émule connection.stop() de SignalR
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*/
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async stop() {
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if (this.socket) {
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this.socket.disconnect();
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this.connected = false;
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console.log('🛑 WebSocket fermé');
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}
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}
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/**
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* Émule connection.invoke() de SignalR
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*/
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async invoke(methodName, ...args) {
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return new Promise((resolve, reject) => {
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if (!this.connected) {
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reject(new Error('WebSocket non connecté'));
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return;
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}
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const invocationId = ++this.invocationId;
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console.log(`📤 WebSocket invoke: ${methodName}`, args);
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// Stocker la promesse pour la résolution
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this.pendingInvocations.set(invocationId, { resolve, reject });
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// Émuler le format SignalR mais utiliser l'API SocketIO
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// SocketIO utilise emit avec un callback pour les réponses
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this.socket.emit(methodName, ...args, (response) => {
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console.log(`📥 WebSocket response for ${methodName}:`, response);
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const pending = this.pendingInvocations.get(invocationId);
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if (pending) {
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pending.resolve(response);
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this.pendingInvocations.delete(invocationId);
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}
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});
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// Timeout pour éviter les promesses pendantes
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setTimeout(() => {
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const pending = this.pendingInvocations.get(invocationId);
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if (pending) {
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pending.reject(new Error(`Timeout invoking ${methodName}`));
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this.pendingInvocations.delete(invocationId);
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}
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}, 30000);
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});
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}
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/**
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* Émule connection.on() de SignalR
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*/
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on(eventName, handler) {
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console.log(`👂 WebSocket listener ajouté: ${eventName}`);
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this.handlers.set(eventName, handler);
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// Mapper les événements SocketIO vers les handlers
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if (this.socket) {
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this.socket.on(eventName, (...args) => {
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console.log(`📨 WebSocket event reçu: ${eventName}`, args);
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handler(eventName, args);
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});
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}
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}
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/**
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* Émule connection.off() de SignalR
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*/
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off(eventName) {
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this.handlers.delete(eventName);
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if (this.socket) {
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this.socket.off(eventName);
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}
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}
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/**
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* État de la connexion (émule SignalR HubConnectionState)
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*/
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get state() {
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if (this.connected) {
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return 'Connected';
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}
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return 'Disconnected';
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}
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/**
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* Vérifier si la connexion utilise WebSocket (toujours vrai pour cet adaptateur)
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*/
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get isWebSocketFallback() {
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return true;
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}
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}
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module.exports = WebSocketAdapter;
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