Basic Auth headers are frequently used as part of communication between applications, e.g. as part of API calls.

Common use cases in the Ataccama context include (and not limited to):

• Graphql call to ONE application
• API call to an online service set up on a DQC / runtime / orchestration server

Option 1: Do it in a ONE Desktop plan

• Create a new plan

• Create a step that evaluates expressions, e.g. Alter Format

• Go into the expression window and put this expression in. The username and password are separated with a colon:

  coding.toBase64('username:password')

• Click Evaluate
• Copy the result string
• Your header is going to be Basic dXNlcm5hbWU6cGFzc3dvcmQ=

Option 2: Use an online base64 encode website

If you are building something to integrate with Ataccama but you don’t actually have Ataccama ONE Desktop installed….

• Go to a website that offers this conversion (e.g. link. Warning: this site is not affiliated with Ataccama)

• Put in your username and password in this format: username:password, separated by a colon

• Convert. (Result of the conversion = dXNlcm5hbWU6cGFzc3dvcmQ=)

• Take that string and make your header like so:

  Basic dXNlcm5hbWU6cGFzc3dvcmQ=

Option 3: Linux/Unix/MacOS shell

• In the shell, use command:

  echo -n user:password | base64

Option 4: Windows 7 or later, Power Shell

$Text = ‘user:password’
$Bytes = [System.Text.Encoding]::UTF8.GetBytes($Text)
$EncodedText = [Convert]::ToBase64String($Bytes)
$EncodedText

Once done, you can make the Http header for our Graphql calls in our Graphql playground, in this format:

{”Authorization”: “Basic dXNlcm5hbWU6cGFzc3dvcmQ=”}

Or in ONE Desktop Json Call step: