Trying to start new config or edit old one returns Server 500 error

[Popolechien]

[rgaudin]

This is due to a ZIM with incorrect metadata in the library.

coopmaths.:
    description: "Ressources libres pour la personnalisation des apprentissages en
      math\xE9matiques"
    id: 2081f380-2241-91ea-3b9e-b17b9538cdd7
    langid: coopmaths.
    language: ''
    name: Coopmaths
    sha256sum: e63ca2d238464c7dff7f9f721614d823d2fcb7ee5803268dd8461d5b8f304a13
    size: 393975808
    sw: y
    type: zim
    url: http://download.kiwix.org/zim/zimit/coopmaths_2022-12.zim
    version: '2022-12-13'

• http://download.kiwix.org/zim/zimit/coopmaths_2022-12.zim has no Language metadata.
• Code assumes there is always a Language metadata.
• Code (borrowed from hotspot) should be more flexible and ignore such entries. Not sure we should create a ticket as this will change both at hotspot and cardshop levele soon.
• Removed ZIM file ; problem fixed for now.
• Will check with zimit as we should not end up with a ZIM without Language. Actually I think the ZIM might have had an incorrect Language and the library/ideascube gen script might have removed it because it was not correct.
• Should we pause zimfarm recipes operations until we have a formal, validated training for users and maybe implement a couple protections in the code ?

[kelson42]

It seems clear something has to be done somewhere. We should keep the ticket open as long as this is not clear.

[kelson42]

Will check with zimit as we should not end up with a ZIM without Language. Actually I think the ZIM might have had an incorrect Language and the library/ideascube gen script might have removed it because it was not correct.

A ticket should be open immediatly in Zimit/Warc2zim and probably fixed soon. But We should have other checks IMO. I wonder for example if zimcheck detects this properl, etc...

[rgaudin]

I confirm the scraper does set the Language tag but it would keep what the user provided if it was an incorrect ISO-339-3 code. Fixed in openzim/warc2zim@cd69c67

I am not sure if all scrapers do this kind of check ; certainly not zimwriterfs. I am not sure how much we want to enforce this neither. That's debatable.

One of the culprit here is library-to-offspot that would parse the code from kiwix library (to convert it to ISO-639-1) but there was en edge case and it resulted in an empty string. Fixed in kiwix/operations@5eb83e5

We should definitely discuss the larger issue: how flexible should those metadata be: can a user enter an incorrect Language metadata and what should our tools do about it. Keeping in mind that Language code can evolve (although very rare).

I don't think it's wise to invest time in hardening cardshop/hotspot given this will change with OPDS switch. Being fed a valid catalog is a fair assumption IMO. Fixing catalog would benefits multiple tools so it makes more sense.

[Popolechien]

Should we pause zimfarm recipes operations until we have a formal, validated training for users and maybe implement a couple protections in the code ?

Since mwoffliner is half-broken and zimit isn't really reliable, I'd suggest we limit new zim files to Youtube videos and the like.

[rgaudin]

Rule #1 would be, anyway, to point new recipes to dev and only once validated that everything is OK, should it be moved to the actual repo. If the ZIM took a very long time to create, we can move the file from dev to prod once green lighted