#!/usr/bin/env sh
set -eu
url="${1:-https://example.com/}"
curl -sS -D - -o /dev/null "$url" | grep -Ei '^(HTTP/|age:|cache-control:|etag:|via:|x-cache:|cf-cache-status:)' || true
printf '
Compare with origin by resolving the hostname to your authorized origin IP using curl --resolve.
'