Missing link to detailed PPD documentation

[jonrandahl]

Reconfigured the old ppd doc routes to redirect to app/doc/ppd as well as set the ppd_doc_path variable to point to the same reconfigured route; alongside adding tests querying the new route to ensure the route is valid and contains the expected content as well as tests to verify the old routes redirect with 302 temporary status as a safety measure.

Closes epimorphics/hmlr-linked-data#145

[der]

Why the permanent redirect? All the others are temporary and that seems safer.

[jonrandahl]

Why the permanent redirect? All the others are temporary and that seems safer.

Temporary redirections are best for when you plan to restore the original URL eventually, I didn't think we would be doing this in the application.

[der]

Temporary redirections are best for when you plan to restore the original URL eventually, I didn't think we would be doing this in the application.

Restore or change. Once it's been published as permanent then all user browsers keep that indefinitely and you can never change it to anything else.

So if we ever wanted to change the app structure in the future we would have to work around that.

My mantra is never use a permanent redirect unless you are certain it will never change. E.g. http -> https, or moving from an obsoleted domain to a new domain. But I wouldn't normally use 301 within the structure of an app. Maybe I'm overcautious.

[jonrandahl]

Thanks @der, I wasn't aware of the hassle to later change the links again. I've changed them all to 302's and adjusted the tests to reflect this. 🙏