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# -*- coding: utf-8 -*-
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# Licensed 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
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any, List
import jsonschema
from synapse.config._base import ConfigError
from synapse.types import JsonDict
def validate_config(json_schema: JsonDict, config: Any, config_path: List[str]) -> None:
"""Validates a config setting against a JsonSchema definition
This can be used to validate a section of the config file against a schema
definition. If the validation fails, a ConfigError is raised with a textual
description of the problem.
Args:
json_schema: the schema to validate against
config: the configuration value to be validated
config_path: the path within the config file. This will be used as a basis
for the error message.
"""
try:
jsonschema.validate(config, json_schema)
except jsonschema.ValidationError as e:
# copy `config_path` before modifying it.
path = list(config_path)
for p in list(e.path):
if isinstance(p, int):
path.append("<item %i>" % p)
else:
path.append(str(p))
raise ConfigError(
"Unable to parse configuration: %s at %s" % (e.message, ".".join(path))
)
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