ATOM feed is not standard compliant

[Prosperia]

The kiwix-desktop app's ATOM feed is a great tool, however currently it does not comply with standards.

Please check the URL: https://browse.library.kiwix.org/catalog/v2/entries
at:

• /validator.w3.org

Please note that the URL part has to be fully-qualified i.e.:

• instead of

<link rel="http://opds-spec.org/image/thumbnail"
          href="/catalog/v2/illustration/001eb72b-e815-af2c-7225-f9ad60b5c891/?size=48" 
<link type="text/html" href="/content/cest-pas-sorcier_fr_zapping-sauvage_2024-11" />

• there should be:

<link rel="http://opds-spec.org/image/thumbnail"
          href="http://browse.library.kiwix.org/catalog/v2/illustration/001eb72b-e815-af2c-7225-f9ad60b5c891/?size=48" 
<link type="text/html" href="http://browse.library.kiwix.org/content/cest-pas-sorcier_fr_zapping-sauvage_2024-11" />

---

[kelson42]

We ahould check if the OPDS spec is OK with the validator OR if we don't respect the OPDS spec.

[Laikulo]

I ran into another issue. Entries from the server can have empty categories.
the ODPS spec just referrs to atom, and atom has;

   atomCategory =
      element atom:category {
         atomCommonAttributes,
         attribute term { text },
         attribute scheme { atomUri }?,
         attribute label { text }?,
         undefinedContent
      }

which entry has zero or more of

   atomEntry =
      element atom:entry {
         atomCommonAttributes,
         (atomAuthor*
          & atomCategory*
          & atomContent?
          & atomContributor*
          & atomId
          & atomLink*
          & atomPublished?
          & atomRights?
          & atomSource?
          & atomSummary?
          & atomTitle
          & atomUpdated
          & extensionElement*)
      }

Which implies that it should omit category tags entirely if there are no applicable categories, and that empty category tags are not permitted.

I ran into this while trying to parse the catalog at browse.library.kiwix.org with atoma for python.