get_access_token.sh

#!/bin/bash -e
encode() {
    local _length="${#1}"
    for (( _offset = 0 ; _offset < _length ; _offset++ )); do
        _print_offset="${1:_offset:1}"
        case "${_print_offset}" in
            [a-zA-Z0-9.~_-]) printf "${_print_offset}" ;;
            ' ') printf + ;;
            *) printf '%%%X' "'${_print_offset}" ;;
        esac
    done
}
CLIENT_ID=$(encode $CLIENT_ID)
CLIENT_SECRET=$(encode $CLIENT_SECRET)
RESOURCE_URI=$(encode "https://management.azure.com/")
APP_TENTANT_ID=$(encode $APP_TENTANT_ID)
FORMDATA="grant_type=client_credentials&client_id=$CLIENT_ID&client_secret=$CLIENT_SECRET" #&resource=$RESOURCE_URI"
REQUEST_TOKEN=$(curl -s -X POST "https://login.microsoftonline.com/$APP_TENTANT_ID/oauth2/token" -H "Content-Type: application/x-www-form-urlencoded" -d "$FORMDATA" 2>&1)
ACCESS_TOKEN=$(echo "import json; token=json.loads('$REQUEST_TOKEN'); print(token[\"access_token\"])")
python -c "$ACCESS_TOKEN"