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87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Log formatters that output terse JSON.
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"""
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import json
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import logging
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_encoder = json.JSONEncoder(ensure_ascii=False, separators=(",", ":"))
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# The properties of a standard LogRecord that should be ignored when generating
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# JSON logs.
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_IGNORED_LOG_RECORD_ATTRIBUTES = {
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"args",
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"asctime",
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"created",
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"exc_info",
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# exc_text isn't a public attribute, but is used to cache the result of formatException.
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"exc_text",
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"filename",
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"funcName",
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"levelname",
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"levelno",
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"lineno",
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"message",
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"module",
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"msecs",
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"msg",
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"name",
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"pathname",
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"process",
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"processName",
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"relativeCreated",
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"stack_info",
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"thread",
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"threadName",
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}
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class JsonFormatter(logging.Formatter):
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def format(self, record: logging.LogRecord) -> str:
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event = {
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"log": record.getMessage(),
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"namespace": record.name,
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"level": record.levelname,
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}
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return self._format(record, event)
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def _format(self, record: logging.LogRecord, event: dict) -> str:
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# Add attributes specified via the extra keyword to the logged event.
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for key, value in record.__dict__.items():
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if key not in _IGNORED_LOG_RECORD_ATTRIBUTES:
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event[key] = value
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if record.exc_info:
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exc_type, exc_value, _ = record.exc_info
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if exc_type:
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event["exc_type"] = f"{exc_type.__name__}"
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event["exc_value"] = f"{exc_value}"
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return _encoder.encode(event)
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class TerseJsonFormatter(JsonFormatter):
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def format(self, record: logging.LogRecord) -> str:
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event = {
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"log": record.getMessage(),
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"namespace": record.name,
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"level": record.levelname,
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"time": round(record.created, 2),
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}
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return self._format(record, event)
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