Check URL and return timing, http code, number of redirects, and effective url

check_http.sh

#!/usr/bin/env bash
#
# returns the following
# [curl exit code],[total request time],[http response code],[number of redirects],[effective url]
#

if [[ ${1} == '' ]]; then
  echo >&2 'missing URL to check'
  echo >&2 "Usage: $0 google.com"
  exit 1
fi

check() {
  local curl_output
  local curl_return
  curl_output="$(curl -sL \
       -o /dev/null \
       --fail-early \
       --max-time ${CURL_MAX_TIME:-5} \
       --connect-timeout ${CURL_CONNECT_TIMEOUT:-3} \
       -w "%{time_total},%{http_code},%{num_redirects},%{url_effective}\n" \
       "$@")"
  curl_return="$?"
  echo "${curl_return},${curl_output}"
  return ${curl_return}
}

check "$@"