#!/bin/bash
# parameter 1: url, only GET method supported now
# parameter 2: text needs to be contained
# parameter 3: retry count, if check failed we will wait 1s before next retry, until retry time exceeds retry count

set -eu

url=$1
contain=$2
retry_count=$3

shift 3

counter=0
while [ $counter -lt $retry_count ]; do
	got=$(curl -s $url | grep "$contain" | wc -l)
	if [[ $got -gt 0 ]]; then
		echo "HTTP $url is alive"
		exit 0
	fi
	((counter += 1))
	echo "wait for HTTP alive for $counter-th time"
	sleep 1
done

echo "HTTP $url is not alive"
exit 1