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Andras Schmelczer 2026-09-26 20:22:16 +01:00
commit b07aa589ff
1 changed files with 728 additions and 530 deletions
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10
frontend/sync-client/src/services/websocket-manager.ts
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@ -5,7 +5,7 @@ import type { WebSocketClientMessage } from "./types/WebSocketClientMessage";
import type { CursorPositionFromClient } from "./types/CursorPositionFromClient";
import type { ClientCursors } from "./types/ClientCursors";
import { createPromise } from "../utils/create-promise";
import { WEBSOCKET_DISCONNECT_TIMEOUT_IN_S } from "../consts";
import { WEBSOCKET_DISCONNECT_TIMEOUT_IN_S, WEBSOCKET_RECEIVE_TIMEOUT_MS } from "../consts";
import { removeFromArray } from "../utils/remove-from-array";
import { EventListeners } from "../utils/data-structures/event-listeners";
import { awaitAll } from "../utils/await-all";
@ -177,13 +177,15 @@ export class WebSocketManager {
private expectResponse(socket: WebSocket): void {
clearTimeout(this.receiveTimeoutId);
// Cursor heartbeats are acknowledged every 15 seconds, including when
// there are no open editors. An OPEN TCP socket alone proves nothing.
// Cursor heartbeats are acknowledged every CURSOR_HEARTBEAT_INTERVAL_MS,
// including when there are no open editors. An OPEN TCP socket alone
// proves nothing: silence past the heartbeat deadline means a
// half-open connection.
this.receiveTimeoutId = setTimeout(() => {
if (this.webSocket !== socket || this.isStopped) return;
this.logger.warn("WebSocket receive deadline expired");
this.reconnect(socket);
}, 45_000);
}, WEBSOCKET_RECEIVE_TIMEOUT_MS);
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- Browser timers have no unref method.
this.receiveTimeoutId.unref?.();
}