Current problems:

• no success messaging when upload is successful (it just takes you back to the package list page, where the user may or may not notice the package in the list)

• sometimes an NPE is generated during the upload/validation routine which is uncaught and presents a bug report to the user

• max file size error messaging doesn't seem to work, doesn't notify the user when the file exceeds the threshold, and the form is borked (buttons are disabled, no messaging; "what happened?")

• validation errors result in the user being taken to a "Confirm" page that simply lists the validation problem

  • this forces the user to go back to the listing page, then to the upload page to retry

Proposed changes:

• provide proper success message feedback on listing page after successful upload

• catch all possible exceptions during upload process and display error messaging as appropriate

• fix max file size exceeded messaging

• remove the Confirm page entirely (it's essentially useless); instead provide validation error messages on the Upload page via AJAX

  • this way the user can see the problem and try a different module all on the same page without having to navigate back to the Upload page