Using curl to test secure websocket connections

curl-test-secure-websocket.sh

curl -i -N \
    -H "Connection: Upgrade" \
    -H "Upgrade: websocket" \
    -H "Host: localhost:8081" \
    -H "Origin: https://localhost" \
    --http1.1 \
    --key ./helm/server-key.pem \
    --cert ./helm/server-cert.pem \
    --cacert ./helm/root-cert.pem \
    -H "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
    -H "Sec-WebSocket-Version: 13" \
    "https://localhost:8081/socket.io/?EIO=3&transport=websocket"