geojson_format.py

import geojson


def is_valid(resource, file):
    """Check if the content is a readable GeoJSON file."""

    with open(file.name, "rb") as f:
        try:
            geojson_data = geojson.load(f)
            if isinstance(geojson_data, dict) and "type" in geojson_data:
                return True
            else:
                resource["error"] = "JSON is not GeoJSON."
                return False
        except Exception as e:
            resource["error"] = str(e)