Inputs (in particular the collection.json) should be checked

[kelson42]

See #28. After many iterations we have achieved to buidl a ZIM, but the ZIM is incorrect and we have no clue why.

The check should, at start, verify that everything is OK (and reports/stops otherwise):

• Key inputs/files are downloadable
• Key values are available in the JSON
• JSON values are correct, in particular the files
• ...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[rgaudin]

This is mostly obsolete. JSON is the source of trust and entries are checked early.
Only recent URL entries are not completely checked

[kelson42]

@rgaudin I don't understand your last comment: do we check data in json are correct? If "yes, how? If "no", why this doesnot matter?

[rgaudin]

JSON entries are either a references to a file in the ZIP archive (if using one) or an arbitrary URL.
If an URL, we check that the URL works (HTTP 200) ; if not, we check that it is indeed inside the ZIP.