pipe the output of log files to slack

slack-piper.sh

#!/bin/bash
# Author: @cyberbutler
# Description: pipe the output of log files to slack
# Usage:
# _> export SLACKHOOKURL=<your slack hook url here>
# _> tail -f -n0 /var/log/access.log [...other.log] | slack-piper.sh

while read line
do
    payload="{\"text\":\"\`\`\`$(echo $line | sed 's/"/\\"/g' | tr -d "\r"| grep -v "==>" | grep -Ev "^$")\`\`\`\"}"   
    if echo $payload | grep -qv '{"text":"``````"}'; then
        curl -X POST -H 'Content-type: application/json' --data "$payload" $SLACKHOOKURL
    fi
done