Current File : //usr/local/keyhelp/call_url

#!/bin/bash

#
#  _  __          _   _     _      (R)
# | |/ /___ _   _| |_| |___| |___
# | | /  -_) |_/ |  _  | -_) | _ \
# |_|\_\___|\__, |_| |_|___|_|  _/
#           |___/            |_|
#
# @author  Alexander Mahr <am@keyweb.de>
# @link    https://www.keyhelp.de
#

#
# This script calls a URL and checks if the returned HTTP status code is 200.
# It is supposed to be used with KeyHelp's 'Scheduled Tasks' feature.
#

VERSION="1.1"
DEBUG=0

#=======================================================================================================================
# Functions
#=======================================================================================================================

    function usage()
    {
        THIS_FILENAME=`basename "$0"`
        echo "Calls a URL and checks if the returned HTTP status code is 200."
        echo "This script is quiet by default if no errors occur, as it is supposed to be used as a cron script."
        echo ""
        echo "Usage: $THIS_FILENAME [options...] <URL>"
        echo ""
        echo "Options:"
        echo "-h, --help      Displays this help text."
        echo "-d, --debug     Enables debug outputs."
        echo "-v, --version   Shows the script version."
    }

    function echo_error()
    {
        echo $1 >&2;
    }

    function echo_debug()
    {
        if [ $DEBUG == "1" ]; then
            echo $1;
        fi
    }

#=======================================================================================================================
# Parse parameters
#=======================================================================================================================

    POSITIONAL=()

    # Options
    while [[ $# -gt 0 ]]
    do
        KEY="$1"

        case $KEY in
            -h|--help)
                usage
                exit 0
                ;;
            -d|--debug)
                DEBUG=1
                shift
                ;;
            -v|--version)
                echo $VERSION
                exit 0
                ;;
            -*)
                echo_error "Error | Unknown option: $1"
                exit 1
                ;;
            *)
                # Positional parameter, save it in an array for later
                POSITIONAL+=($KEY)
                shift
                ;;
        esac
    done

    # Restore positional parameters
    set -- "${POSITIONAL[@]}"

    # Assign positional parameter
    URL="$1"

#=======================================================================================================================
# Call URL
#=======================================================================================================================

    if [ -z $URL ]; then
        echo_error "URL is missing."
        exit 1
    fi

    HTTP_CODE=`curl --silent --show-error --location --insecure --output "/dev/null" --write-out "%{http_code}" "$URL"`

    if [ $? -ne 0 ]; then
        echo_error "Failed to call URL: $1"
        exit 1
    fi

    if [[ "$HTTP_CODE" -lt 200 || "$HTTP_CODE" -ge 300 ]]; then
        echo_error "URL called: $1"
        echo_error "Status: $HTTP_CODE"
        exit 1
    fi

    echo_debug "URL called: $1"
    echo_debug "Status: $HTTP_CODE"