Get output from an Azure batch execution

get-batch-output

#!/usr/bin/env bash

if [[ $# != 2 ]]; then
  echo "Cowardly refusing to run without exactly two arguments"
  echo "Syntax: $0 key-string url"
  exit 1
fi

API_VERSION="2019-08-01.10.0"
DATE=$(date +"%a, %d %b %Y %T %Z")

KEY=$1
URL="$2?api-version=$API_VERSION"

CANRESOURCE=$(echo -n $URL|sed 's|https:/||;s|\..*\.batch\.azure\.com||;s|\?|\n|s|=|:|')
ACCOUNT=$(echo -n $URL|sed -r 's|https://([^.]*)\..*|\1|')

SIGSTRING="GET\n\n\n\n\n\n\n\n\n\n\n\nocp-date:$DATE\n$CANRESOURCE"

SIGNATURE=$(hmac256 --binary $(echo -n $KEY|base64 -d)  <(echo -en $SIGSTRING|iconv -t utf8 -)|base64 -w0)

curl -sLk $URL -H "Authorization: SharedKey $ACCOUNT:$SIGNATURE" -H "ocp-date: $DATE"