Socket.IO

Rostyman supports Socket.IO connections for real-time event-driven communication.

Creating a Socket.IO Connection

1. Click the + button in the tab bar → Socket.IO
2. Or use the New Request dialog and select Socket.IO

Connection

URL

Enter your Socket.IO server URL in the URL bar (e.g., http://localhost:3000).

Connect / Disconnect

• Click Connect to establish a connection
• The status dot shows: gray (disconnected), yellow (connecting), green (connected), red (error)
• Click Disconnect to close the connection
• Auto-reconnection is enabled by default (5 attempts, 1s delay)

Tabs

Emit

Send events to the server:

• Event name — the event type to emit (e.g., message, join, chat)
• Data — JSON payload in the Monaco editor
• Click Emit to send (only enabled when connected)

Events

All incoming events are automatically captured and displayed in the message log below. The onAny listener captures every event — no need to manually subscribe.

Settings

Configure connection options (set before connecting):

• Path — Socket.IO path (default: /socket.io)
• Auth (JSON) — authentication payload sent on connection (e.g., {"token": "..."})
• Query Params (JSON) — query parameters appended to the handshake URL

Message Log

The bottom panel shows all communication:

• Sent (green ↑) — events you emitted
• Received (blue ↓) — events from the server
• System (·) — connection, disconnection, error messages

Filter buttons: All, Sent, Received, System. Clear button to reset the log.

Each entry shows: timestamp, direction, event name, and data payload.

Tips

• Socket.IO uses WebSocket transport by default, with HTTP long-polling as fallback
• Auth payload is sent during the initial handshake — set it before connecting
• The message log is ephemeral — cleared when you close the tab
• Use JSON format for data payloads for best compatibility