Tag: websocket

4 articles

Fix: GraphQL Subscription Not Updating — WebSocket Connection Not Receiving Events

Mar 22, 2026

How to fix GraphQL subscriptions not receiving updates — WebSocket setup, subscription protocol, Apollo Client config, server-side pub/sub, authentication over WebSocket, and reconnection.

graphql websocket nodejs frontend debugging

Fix: Socket.IO CORS Error — Cross-Origin Connection Blocked

Mar 21, 2026

How to fix Socket.IO CORS errors — server-side CORS configuration, credential handling, polling vs WebSocket transport, proxy setup, and common connection failures.

nodejs javascript backend websocket debugging

Fix: Socket.IO Not Connecting (CORS, Transport, and Namespace Errors)

Mar 17, 2026

How to fix Socket.IO connection failures — CORS errors, transport fallback issues, wrong namespace, server not emitting to the right room, and how to debug Socket.IO connections in production.

socket-io nodejs javascript websocket debugging

Fix: Nginx WebSocket Proxy Not Working (101 Switching Protocols Failed)

Mar 14, 2026

How to fix Nginx WebSocket proxying not working — 101 Switching Protocols fails, connections drop after 60 seconds, missing Upgrade headers, and SSL WebSocket configuration.

nginx websocket devops nodejs debugging