WebSocket Echo

curl

curl --no-buffer \
  --include \
  --header "Connection: Upgrade" \
  --header "Upgrade: websocket" \
  --header "Sec-WebSocket-Version: 13" \
  --header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
  https://tcpdata.com/ws

websocat (CLI tool)

# Install: cargo install websocat
websocat wss://tcpdata.com/ws

JavaScript

const ws = new WebSocket('wss://tcpdata.com/ws');
ws.onmessage = (e) => console.log('Echo:', e.data);
ws.send('Hello WebSocket!');

Python (websockets)

import asyncio
import websockets

async def test():
    async with websockets.connect('wss://tcpdata.com/ws') as ws:
        await ws.send('Hello WebSocket!')
        response = await ws.recv()
        print(f'Echo: {response}')

asyncio.run(test())

Examples