Resource validation page

[icmurray]

• On the resources tab, there's a "Check Resources" button which, when clicked makes an ajax request with the list of URLs entered by the user.

• The server checka each link for errors and header information about the linked resource. (Using ckanext/archiver/tasks.py:link_checker()).

• The server returns a list of dicts (json), containing information about the linked resource, and the client uses that to:

• populate the format field of each resource

The (guessed) 'file_extension' populates the 'format' field. If it's 'htm' or 'html', then we assume it's a listing page, and so don't populate the format field with 'htm' or 'html'.

• provide feedback if a URL appears to be invalid

If the URL doesn't appear to be a URL at all, or returns a HTTP error, or times-out, then URL field is highlighted in red to indicate it's a bad URL. A tooltip shows the error message to the user.

• [Optional] provide feedback if a URL appears to point to "Additional Information" - ie the Resource should be entered under "Additional Resources", rather than "Timeseries" or "Individual" datasets.

Analysis and further description on etherpad: ​http://ckan.okfnpad.org/dgu-package-form? [Section I]