S3 GET Speed Private Bucket

s3-get-speed-private.sh

#!/bin/bash
set -e

: ${AWS_ACCESS_KEY_ID:?"AWS_ACCESS_KEY_ID should be set in script or exported"}
: ${AWS_SECRET_ACCESS_KEY:?"AWS_SECRET_ACCESS_KEY should be set in script or exported"}

if [[ $# -eq 0 ]] ; then
    echo 'S3 object URL expected as argument. Usage: ./s3-get-speed-private.sh <s3-private-object-uri>'
    exit 0
fi
BUCKET=`echo $1 | cut -d '/' -f 4`
KEY=`echo $1 | cut -d '/' -f 5- `
REGION=`echo $1 | cut -d '-' -f 2-4 | cut -d '.' -f 1`
CONTENT_TYPE="text/html; charset=UTF-8"
DATE="`date -u +'%a, %d %b %Y %H:%M:%S GMT'`"
RESOURCE="/${BUCKET}/${KEY}"
SIG_INPUT="GET\n\n${CONTENT_TYPE}\n\nx-amz-date:${DATE}\n${RESOURCE}"
SIGNATURE=`echo -en $SIG_INPUT | openssl sha1 -hmac "${AWS_SECRET_ACCESS_KEY}" -binary | base64`

echo "Downloading to /dev/null.."
CURL_STATS=`curl -w '%{speed_download}\t%{time_namelookup}\t%{time_connect}\t%{time_pretransfer}\t%{time_starttransfer}\t%{time_redirect}\t%{time_total}\n' -o /dev/null -H "x-amz-date: ${DATE}" -H "Content-Type: ${CONTENT_TYPE}" -H "Authorization: AWS ${AWS_ACCESS_KEY_ID}:${SIGNATURE}" -s $1`
SPEED=`echo $CURL_STATS | awk '{print $1}' | sed 's/\..*//'`
DNS_TIME=`echo $CURL_STATS | awk '{print $2}'`
CONNECT_TIME=`echo $CURL_STATS | awk '{print $3}'`
PRE_TRANSFER_TIME=`echo $CURL_STATS | awk '{print $4}'`
START_TRANSFER_TIME=`echo $CURL_STATS | awk '{print $5}'`
REDIRECT_TIME=`echo $CURL_STATS | awk '{print $6}'`
TOTAL_TIME=`echo $CURL_STATS | awk '{print $7}'`
MBSPEED=`awk -v s=$SPEED 'BEGIN { print s/(1024*1024) }'`

echo "--- S3 GET STATS ---"
echo "namelookup: ${DNS_TIME}s"
echo "connect: ${CONNECT_TIME}s"
echo "pre-transfer: ${PRE_TRANSFER_TIME}s"
echo "start-transfer: ${START_TRANSFER_TIME}s"
echo "redirect: ${REDIRECT_TIME}s"
echo "total: ${TOTAL_TIME}s"
echo "speed: ${MBSPEED}MB/s"