bash script for http status check

httpserver_check.sh

#!/bin/bash

# endpoint URI
endpoint=$1
# http execution timeout [sec]
timeout=1
successful_http_code=${2:-200}
execution_fail_code="000"
max_attempts=${3:-5}

echo "endpoint: ${endpoint}"
echo "successful_http_code: ${successful_http_code}"

function connect_to_server {
	status=`curl -s ${endpoint} -o /dev/null -w '%{http_code}'`
	if [ "000" == $status ];then
		echo "connection failed"
		return 1
	fi
	echo "http_status is '${status}'"
	[ $successful_http_code -eq $status ] && rtn=0 || rtn=1
	return $rtn
}

attempts=0
while [ $attempts -ne $max_attempts ]
do
	echo "Try to check...($attempts)"
	connect_to_server
	results=$?
	if [ 0 -eq $results ];then
		exit 0
	fi
	attempts=`expr $attempts + 1`
	sleep 1
done
exit 1