I was looking into AGPUSH-720 and I got an perception that not all error response do we actually know on the client-side.

We should establish a common pattern - contract between server and client - which says how is a failure message transported from server to client, e.g.:

- response header

- response message body /w given structure

Right now, I've opened a PR for a generic failure handling mechanism that can catch and report any error:

I plan to extend this error handling code dynamically as needed based on response codes (e.g. 404=Request resource is missing) and contract mentioned above ^.

Wdyt?

~ Lukas