incubator-superset0.99/superset/views/database/decorators.py

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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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import functools
import logging
from typing import Optional

from flask import g
from flask_babel import lazy_gettext as _

from superset.models.core import Database
from superset.utils.core import parse_js_uri_path_item

logger = logging.getLogger(__name__)


def check_datasource_access(f):
    """
    A Decorator that checks if a user has datasource access
    """

    def wraps(
        self, pk: int, table_name: str, schema_name: Optional[str] = None
    ):  # pylint: disable=invalid-name
        schema_name_parsed = parse_js_uri_path_item(schema_name, eval_undefined=True)
        table_name_parsed = parse_js_uri_path_item(table_name)
        if not table_name_parsed:
            return self.response_422(message=_("Table name undefined"))
        database: Database = self.datamodel.get(pk)
        if not database:
            self.stats_logger.incr(
                f"database_not_found_{self.__class__.__name__}.select_star"
            )
            return self.response_404()
        # Check that the user can access the datasource
        if not self.appbuilder.sm.can_access_datasource(
            database, table_name_parsed, schema_name_parsed
        ):
            self.stats_logger.incr(
                f"permisssion_denied_{self.__class__.__name__}.select_star"
            )
            logger.warning(
                f"Permission denied for user {g.user} on table: {table_name_parsed} "
                f"schema: {schema_name_parsed}"
            )
            return self.response_404()
        return f(self, database, table_name_parsed, schema_name_parsed)

    return functools.update_wrapper(wraps, f)