54 lines
1.3 KiB
TypeScript
54 lines
1.3 KiB
TypeScript
import type WebSocket from 'ws';
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import { Service } from 'typedi';
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import { Logger } from '@/Logger';
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import { AbstractPush } from './abstract.push';
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function heartbeat(this: WebSocket) {
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this.isAlive = true;
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}
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@Service()
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export class WebSocketPush extends AbstractPush<WebSocket> {
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constructor(logger: Logger) {
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super(logger);
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// Ping all connected clients every 60 seconds
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setInterval(() => this.pingAll(), 60 * 1000);
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}
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add(pushRef: string, connection: WebSocket) {
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connection.isAlive = true;
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connection.on('pong', heartbeat);
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super.add(pushRef, connection);
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// Makes sure to remove the session if the connection is closed
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connection.once('close', () => {
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connection.off('pong', heartbeat);
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this.remove(pushRef);
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});
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}
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protected close(connection: WebSocket): void {
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connection.close();
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}
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protected sendToOneConnection(connection: WebSocket, data: string): void {
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connection.send(data);
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}
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private pingAll() {
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for (const pushRef in this.connections) {
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const connection = this.connections[pushRef];
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// If a connection did not respond with a `PONG` in the last 60 seconds, disconnect
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if (!connection.isAlive) {
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delete this.connections[pushRef];
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return connection.terminate();
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}
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connection.isAlive = false;
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connection.ping();
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}
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}
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}
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