We’re migrating from polling the notification API to using the WebSocket endpoint for real-time conversation updates in our Node.js integration. The connection setup seems fine, but as soon as the socket opens, we get hammered with a massive burst of historical events that we don’t actually need. It’s causing our buffer to overflow and we’re dropping legitimate real-time updates. We’ve tried filtering via the query params on the initial GET request before upgrading to WS, but it feels clunky.
Here’s what the event stream looks like when it connects. Is there a way to tell the server to only send events from the exact second of connection? We’re using the @genesyscloud/genesyscloud-apis-node SDK but falling back to raw WebSocket for this specific flow. The timestamp in the payload is always in the past, which is the issue.
{
"event": "conversations",
"data": {
"id": "abc-123",
"type": "voice",
"updatedTimestamp": "2023-10-27T09:15:00.000Z" // This is old
}
}
The notification API doesn’t support filtering on the WebSocket handshake itself. You’re stuck with the initial burst. The trick is to ignore everything that arrives before you send your first subscribe message with the specific resourceType and resourceId you care about.
Here’s how I handle it in Node. Keep a simple flag or timestamp. If the event is old, drop it. If it’s new, process it.
const WebSocket = require('ws');
const ws = new WebSocket('wss://api.mycxone.com/api/v2/notifications');
ws.on('open', () => {
// 1. Immediately subscribe to only what you need
// This stops the server from sending you everything else,
// but you'll still get the backlog of existing items for this resource.
ws.send(JSON.stringify({
action: 'subscribe',
resourceType: 'conversations',
resourceId: 'your-conversation-id' // or omit for all conversations
}));
});
let isInitialBurst = true;
ws.on('message', (data) => {
const events = JSON.parse(data);
events.forEach(event => {
// Simple heuristic: if we just connected, ignore events older than X seconds
// or check if the event timestamp is before your app start time
const eventTime = new Date(event.eventTime).getTime();
const now = Date.now();
const threshold = 1000 * 60 * 5; // 5 minutes
if (isInitialBurst && (now - eventTime) > threshold) {
console.log('Dropping historical event:', event.resourceId);
return;
}
isInitialBurst = false;
handleRealTimeEvent(event);
});
});
function handleRealTimeEvent(event) {
// Process your actual real-time data
console.log('Processing live event:', event.resourceId);
}
Don’t try to filter at the HTTP level before the upgrade. It doesn’t work. Just consume and discard on the client side until you hit your subscription. The buffer overflow happens because you’re trying to process the backlog. Let it pass through.
Also, make sure you’re handling the ping/pong frames. The server sends pings. If you don’t respond, it drops the connection. Node’s ws library handles this automatically if you don’t override the default behavior.