curl check connection to host

#!/bin/bash -

PATH=/usr/bin

##################################################
# Check Internet access through the NAT gateway.

CHECK_URL="www.google.com"
PROTOCOL="https://"
http_response=$(curl --retry-delay 3 --retry 5 -sIf $PROTOCOL$CHECK_URL)
exit_code=$?

case $exit_code in
  0)
     http_status=$(echo $http_response | head -n 1 | awk '{print $2}')
     ;;
  6)
     http_status=" Couldn't resolve host"
     ;;
  7)
     http_status=" Failed to connect to host"
     ;;
  22)
     http_status=" HTTP page not retrieved"
     ;;
  *)
     http_status=" See official documentation"
     ;;
esac


##################################################
# Print output for consul dashboard
echo "CURL - Results of cheking connection to "$CHECK_URL" over AWS NAT Gateway:"
echo "  -- CURL exit code: $exit_code"
echo "  -- HTTP response code: $http_status"

if [[ $exit_code -ne 0 ]]; then traceroute -4 $CHECK_URL; fi
##################################################
# 0 = OK
# 1 = WARNING

if [[ $exit_code -ne 0 ]]; then exit 1; fi

exit 0