Retrieve an access token for a btp cf app

btp_accesstoken

#!/bin/bash
# Get BTP OAuth access token
# Usage:
# btp_accesstoken <appname>
#
# Call this bash script with btp_accesstoken <appname> where appname is a name
# of your apps on btp. 
# You can retrieve the list of apps with 'cf a'
# Login credentials are retrieved from bitwarden. You have to be logged into it already
# client_id, client_secret, oauth endpoint are retrieved from 'cf de <appname>'. You have to be looged into it as well.

appname=$1

function showHelp {
  echo "usage: btp_accesstoken <appname>"
  echo "You can retrieve the list of deployed apps with 'cf a'"
	exit
}

if [ -z "$appname" ]
then
	showHelp
fi

cf de ${appname}
# jq returns a string with leading and trailing quotes cut ... removes them
btp_oauth_url=$(cat default-env.json | jq '.VCAP_SERVICES.xsuaa[0].credentials.url' | cut -d '"' -f 2)
# the oauth endpoint
oauth_path="/oauth/token"
btp_oauth_url=${btp_oauth_url}${oauth_path}
client_id=$(cat default-env.json | jq .VCAP_SERVICES.xsuaa[0].credentials.clientid | cut -d'"' -f 2)
client_secret=$(cat default-env.json | jq .VCAP_SERVICES.xsuaa[0].credentials.clientsecret | cut -d '"' -f 2)
password=$(bw get password universalid.sap.com --raw)
username=$(bw get username universalid.sap.com --raw)

#echo $btp_oauth_url
#echo ${client_id}:${client_secret}
base64Auth=$(echo -n ${client_id}:${client_secret} | base64)
# echo ${base64Auth}

curl \
  -X POST ${btp_oauth_url} \
  -H 'Authorization: Basic '${base64Auth} \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data-urlencode 'grant_type=password' \
  --data-urlencode 'username='${username} \
  --data-urlencode 'password='${password} \
  --data-urlencode 'response_type=token' \
  | jq .
#  | jq .access_token