Allow validating local datasets

[dstansby]

I just tried validating a local file, and the tool didn't seem to work - the link I used was https://ome.github.io/ome-ngff-validator/?source=file:///Users/dstansby/notebooks/ct-scans/david_ct_scan.zarr, and the directory definitely exists. The error message is:

Error Loading file:///Users/dstansby/notebooks/ct-scans/david_ct_scan.zarr/.zattrs: TypeError: NetworkError when attempting to fetch resource.

[will-moore]

The easiest solution is to use ome-zarr-py:

$ ome_zarr view path/to/ct-scans/david_ct_scan.zarr

That will serve the zarr locally and automatically open it in ome-ngff-validator.

See https://ome-zarr.readthedocs.io/en/stable/cli.html#view
It actually looks best if you don't add the trailing slash as above (not like in the docs)

[tlambert03]

was trying to follow this, pointing to a file in the current directory:

ome_zarr view my_stream.zarr

and got this:

haven't looked at the ome_zarr view source yet... but does that suggest an error in the serving of the file? or an error in the ome zarr

[tlambert03]

ah, maybe it's a CORS issue:

Fetch API cannot load http://localhost:8000/my_stream.zarr/zarr.json due to access control checks.

[tlambert03]

got farther with chrome..., was previously on safari Version 18.3 (20620.2.4.11.5)

[tlambert03]

I guess going back to the original post here. I would +1 the request for a command line tool that just lets me ome-validate some_uri. something that could be run on github actions for example when testing writers?

[dstansby]

If you're in Python, ome-zarr-models can do validation on local datasets, but not with a command line tool.

[tlambert03]

thanks @dstansby !

[will-moore]

@tlambert03 Re: "got farther with chrome" - did you get the validator working?

@dstansby any plan to add command like tool to ome-zarr-models-py?

[dstansby]

No plans yet, but I think we would definitely welcome a feature request for a command line validator 👍