Script shell to send notification to ntfy.sh from a Xigmanas NAS (FreeBSD without curl)

send.sh

#!/bin/bash

HOST=ntfy.sh
TOPIC=$2
PORT=80

PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin"

CONTENT=$1

# Send

if [[ "$CONTENT" != "" ]]; then
    echo "$CONTENT"
    CONTENT_LEN=$(echo -en ${CONTENT} | wc -c)
    echo -ne "POST /${TOPIC} HTTP/1.0\r\nHost: $HOST\r\nContent-Type: application/x-www-form-urlencoded\r\nContent-Length: ${CONTENT_LEN}\r\n\r\n${CONTENT}" | nc -w 15 $HOST $PORT
fi