Failure to get printer lists on systems with Z-Scaler
Issue: directprint.io cannot get the printer list on systems with z-scaler in use.
Technical detail: When directprint.io client queries https://directprint.io for the printer list Z-scaler returns an intermediate HTML page requesting authorization or performing an HTML-JS level redirect. The same page works in the browser because it handles the HTML-level redirect to the JSON API.
The directprint.io client is expecting a JSON response. This causes issues with the directprint.io client, preventing printer lists from downloading.
Remedy: On Z-scaler create a URL category 'Auth and SSL Bypass', add directprint.io.
This will exempt directprint.io from authentication and SSL inspection.