Does not run with local socker.io server?

[lrkwz]

Hello I'm trying to have a working example of:

• chat server written in nodejs using socket.io library
• simple bash client (does not need to read messages, only write)

I cannot understand how to compose this using localhost for both server and client...

BTW on ubuntu 16.04 I have and error:

$ ./send_to_websocket.sh           
./send_to_websocket.sh: line 108: kill: (20000) - No such process
./send_to_websocket.sh: line 108: kill: (19999) - No such process

[gmemstr]

Do you have netcat installed? The author mentions you need it to forward the messages to the actual server.

[nbanb]

Hi
I think there's a way to bypass netcat to have a nearly 'pure bash' solution, doing something like

tcp_host=$WS_SERVER
tcp_port=$WS_PORT
fd0=fd0    # would be overwritten by bash
CR=$(echo -en "\r")  # carriage return

exec {fd0}<>/dev/tcp/${tcp_host}/${tcp_port}

while read <&${fd0}
do
        wsreply=${REPLY//$CR/}
        # echo -e "${CR}${wsreply}"  >/dev/shm/last_ws_reply  # uncomment to get WS last reply in /dev/shm/last_ws_reply 
        echo -e "${CR}${wsreply}"
done &

echo -ne "$handshake" >&${fd0}

# other echo 
# ... 

# closing and cleaning
exec {fd0}>&-
[[ -f /dev/shm/last_ws_reply ]] && rm -f /dev/shm/last_ws_reply

Kind regards
nbanba