Check for disappearing cache

check-cache.sh

#!/bin/bash
# Run e.g. check-cache.sh https://www.manzara.si/jakne
# Or time ./check-cache.sh https://www.manzara.si/jakne

if [ $# -eq 0 ]
  then
    echo "Error: Please specify request URL as argument."
    exit 1
fi

TEST_URL="$1"

# run initial warmup
curl -s -L -D /dev/stdout -o initial.html "${TEST_URL}"

# next request should be Hit
X_CACHE="None"

counter=0
until [ "${X_CACHE}" = "MISS" ]
do
  ((counter++))
  echo "Request #${counter}..."
  X_CACHE=$(curl -s -L -D /dev/stdout -o current.html "${TEST_URL}" | grep --ignore-case --only-matching --perl-regexp "X-Cache: \K\w+")
  echo "Received Cache Status: ${X_CACHE}"
  sleep 1
done

echo "Got MISS! Bail! Investigate initial.html vs current.html"