cli http/https status checker

is_it_up

#!/bin/sh

## How many seconds to wait for poll
POLLTIME=10
## How many seconds to wait between polls
SLEEPTIME=3
## Ignore invalid tls negotiation such as invalid/expired certs
INSECURE="-k"

if [ -z "${1}" ]; then
  URL="https://www.google.com"
else
  URL="${1}"
fi

CURLCMD="curl -m ${POLLTIME} ${INSECURE} -s -o /dev/null -w "%{http_code},%{redirect_url}" ${URL}"

while [ 1 ]; do
  echo "## $(date -u), checking: ${URL}"
  HTTPCODE=$(${CURLCMD})
  echo "ts: $(date -u +%s), http_code: ${HTTPCODE}"
  case "${HTTPCODE}" in
    200*)
      echo "## $(date -u), online: ${URL}"
      break
    ;;
    301*)
      echo "## $(date -u), online(redirect): ${URL}"
      break
    ;;
  esac  
  echo "##"
  sleep ${SLEEPTIME}
done

give execute perms and drop in your path somewhere.. usage: is_it_up https://something.ltd.. bails if 200/301