#TIL : Cronjob monitoring web endpoint and alert to Telegram

This is shell script using curl and grep to send request then check if the keyword (FIND) include in the response text body. If failed, try to alert

URL="https://news.ycombinator.com/"
FIND="Hacker News"

response=$(curl -m 10 -s "$URL")
content=$(echo $response | grep "$FIND")

if [ $? -eq 0 ]; then
	echo "OK!"
	exit 0
fi

# Do watever you want to alert
CHAT_ID="telegram_chat_id"
TEXT="The web is down !"
BASIC_AUTH_BOT_PARAM="bot*****:*********"

curl -s -m 10 --get --data-urlencode "chat_id=$CHAT_ID" --data-urlencode "text=$TEXT" "https://api.telegram.org/$BASIC_AUTH_BOT_PARAM/sendMessage"
exit 1