Missing href in zipped asset

[emmanuelmathot]

in some items in the STAC catalog, the zipped_product asset does not have an href. eg. https://stac.core.eopf.eodc.eu/collections/sentinel-2-l2a/items/S2C_MSIL2A_20250831T112131_N0511_R037_T30UXB_20250831T145112.

This leads to the impossibility to use pystac client and is quite blocking for data pipeline:

File ~/Workspace/eopf-explorer/data-pipeline/.venv/lib/python3.13/site-packages/pystac/item.py:468, in Item.from_dict(cls, d, href, root, migrate, preserve_dict)
    455 # get all the fields that are not passed through, parsed, or excluded
    456 extra_fields = {
    457     k: v
    458     for k, v in d.items()
    459     if k not in [*pass_through_fields, *parse_fields, *exclude_fields]
    460 }
    462 item = cls(
    463     **{k: d.get(k) for k in pass_through_fields},  # type: ignore
    464     datetime=datetime,
    465     properties=properties,
    466     extra_fields=extra_fields,
    467     href=href,
--> [468](https://file+.vscode-resource.vscode-cdn.net/home/emathot/Workspace/eopf-explorer/data-pipeline/operator-tools/~/Workspace/eopf-explorer/data-pipeline/.venv/lib/python3.13/site-packages/pystac/item.py:468)     assets={k: Asset.from_dict(v) for k, v in assets.items()},
    469 )
    471 for link in links:
    472     if href is None or link.get("rel", None) != RelType.SELF:

File ~/Workspace/eopf-explorer/data-pipeline/.venv/lib/python3.13/site-packages/pystac/asset.py:200, in Asset.from_dict(cls, d)
    194 """Constructs an Asset from a dict.
    195 
    196 Returns:
    197     Asset: The Asset deserialized from the JSON dict.
    198 """
    199 d = copy(d)
--> [200](https://file+.vscode-resource.vscode-cdn.net/home/emathot/Workspace/eopf-explorer/data-pipeline/operator-tools/~/Workspace/eopf-explorer/data-pipeline/.venv/lib/python3.13/site-packages/pystac/asset.py:200) href = d.pop("href")
    201 media_type = d.pop("type", None)
    202 title = d.pop("title", None)

KeyError: 'href'

Could you please check the missing href assets and fix them. Thank you.

[christophreimer]

@senmao can you please check why the asset href is missing or even present if the stac item was created before we introduced the zarr zip? @emmanuelmathot was the referenced scene provided in the course of a sample data request?

[emmanuelmathot]

No it was in the context of the EOPF explorer data pipeline.
Maybe this is not the right repo.