simple http-monitor

http-monitor.sh

#!/usr/local/bin/bash

# -- init

timestamp=false
bell=false
kill=false
delay="1s"

cleanup ()
{
    echo
    exit 0
}

trap cleanup SIGINT SIGTERM

while getopts ":hbktd:" option; do
    case "$option" in
        h) echo "usage: $0 [-h] [-k] [-b] [-t] [-d delay] URL ..."; exit ;;
        t) timestamp=true ;;
        b) bell=true ;;
        k) kill=true ;;
        d) delay=$OPTARG ;;
        ?) echo "error: option -$OPTARG is not implemented"; exit ;;
    esac
done

shift $(($OPTIND - 1))

# -- main

url="$1"
echo -e "Starting monitor for \e[34m$url\e[0m with interval $delay..."
while true; do
    [ "$timestamp" = true ] && echo -en "\n`date` ➡ "
    http_status=`curl -X GET -Ifso /dev/null -w "%{http_code}" "$url" 2> /dev/null`

    if [ "$http_status" == "200" ]; then
        echo -ne "[\e[32m✔\e[0m]"
    else
        echo -ne "[\e[31m✖\e[0m$http_status]"
        [ "$bell" = true ] && tput bel
        [ "$kill" = true ] && cleanup
    fi

    sleep $delay
done