Websocket On Bash

echo -ne "HTTP/1.1 101 Switching Protocols\r\n" >> resp
echo -ne "Upgrade: websocket\r\nConnection: Upgrade\r\n" >> resp
echo -ne "Sec-WebSocket-Accept: key\r\n" >> resp
echo -ne "\r\n" >> resp

[Server] { coproc P { nc -l 8888; } >&3; } 3>&1
[Client] var ws = new WebSocket("ws://localhost:8888/echo");
[Server] echo -n ${key}258EAFA5-E914-47DA-95CA-C5AB0DC85B11 | openssl dgst -sha1 -binary | base64
[Server] e /tmp/resp
[Server] cat /tmp/resp >&${P[1]}
[Client] ws.send("shit")