Question 1

How do I test a WebSocket server with Postman using iola?

Accepted Answer

Start iola with the WebSocket client command (e.g., `iola ws ws://server-address`), then use Postman to send HTTP POST requests to the exposed REST API endpoint at `http://127.0.0.1:3000/messages`. The tool logs responses in the console and via GET endpoints for inspection.

Question 2

iola vs websocat for socket debugging?

Accepted Answer

iola excels when you need REST client integration and multi-protocol support in one tool, whereas websocat is more lightweight and direct for raw WebSocket or TCP connections without the HTTP layer. Choose iola for workflow compatibility with Postman, but websocat for lower-overhead, command-line piping.

Question 3

Does iola work with Socket.IO v3 servers?

Accepted Answer

No, the README specifies compatibility only with Socket.IO v4, so using it with v3 may lead to connection issues or missing features. Check your server version and consider upgrading or finding an alternative tool.

Question 4

How to send binary data in iola from a REST client?

Accepted Answer

Use the `bytes` field in POST requests with a byte array (e.g., `[72,101,108,108,111]`) and set the `--binary-encoding` option when starting iola to decode responses in formats like UTF8 or Base64, as shown in the binary data examples.

Question 5

Can iola handle authentication for WebSocket connections?

Accepted Answer

Yes, you can pass headers via the `--header` option (e.g., `--header authorization:"Bearer token"`) for WebSocket, and for Socket.IO, use `--auth` for payload authentication, though it doesn't support more complex OAuth or token refresh flows natively.

Question 6

What happens if the socket server disconnects while using iola?

Accepted Answer

iola logs disconnection events in the console, but the REST API may become unresponsive until you restart the client. There's no automatic reconnection feature mentioned, so manual intervention is needed for recovery.

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