Manual WebSocket Test (wscat)
Use CLI tools to verify the WebSocket endpoint outside the browser.
What is wscat?
wscat is a command-line WebSocket client built on Node.js. It lets you connect to a WebSocket server, send messages manually, and inspect responses in real time.
Install via npm
npm install -g wscat
If npm is not installed, install Node.js first from nodejs.org.
Connect and run
- Open a terminal.
- Run the following command:
wscat -c wss://ws.ddyy.online/ericyanws
After connected, send JSON messages such as {"type":"get_uptime"}.
Example output
wscat -c wss://ws.ddyy.online/ericyanws
Connected (press CTRL+C to quit)
< {"type":"connected","message":"Welcome! WebSocket connection established.","connected_at":"2026-05-05 15:42:48 CST","uptime":"0 seconds"}
< {"type":"uptime","uptime":"3 seconds","timestamp":"2026-05-05 15:42:51 CST"}
< {"type":"uptime","uptime":"13 seconds","timestamp":"2026-05-05 15:43:01 CST"}
< {"type":"uptime","uptime":"1 minute 23 seconds","timestamp":"2026-05-05 15:44:11 CST"}
> %
