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# Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file 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
#
# 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.
import time
import datetime
from typing import Any, Dict
from ._meta import ECS_VERSION
from ._utils import json_dumps, normalize_dict
class StructlogFormatter:
"""ECS formatter for the ``structlog`` module"""
def __call__(self, _: Any, name: str, event_dict: Dict[str, Any]) -> str:
# Handle event -> message now so that stuff like `event.dataset` doesn't
# cause problems down the line
event_dict["message"] = str(event_dict.pop("event"))
event_dict = normalize_dict(event_dict)
event_dict.setdefault("log", {}).setdefault("level", name.lower())
event_dict = self.format_to_ecs(event_dict)
return self._json_dumps(event_dict)
def format_to_ecs(self, event_dict: Dict[str, Any]) -> Dict[str, Any]:
if "@timestamp" not in event_dict:
event_dict["@timestamp"] = (
datetime.datetime.fromtimestamp(
time.time(), tz=datetime.timezone.utc
).strftime("%Y-%m-%dT%H:%M:%S.%f")[:-3]
+ "Z"
)
if "exception" in event_dict:
stack_trace = event_dict.pop("exception")
if "error" in event_dict:
event_dict["error"]["stack_trace"] = stack_trace
else:
event_dict["error"] = {"stack_trace": stack_trace}
event_dict.setdefault("ecs.version", ECS_VERSION)
return event_dict
def _json_dumps(self, value: Dict[str, Any]) -> str:
return json_dumps(value=value)
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