airflow log_endpoint 源码
airflow log_endpoint 代码
文件路径:/airflow/api_connexion/endpoints/log_endpoint.py
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF 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.
from __future__ import annotations
from typing import Any
from flask import Response, request
from itsdangerous.exc import BadSignature
from itsdangerous.url_safe import URLSafeSerializer
from sqlalchemy.orm.session import Session
from airflow.api_connexion import security
from airflow.api_connexion.exceptions import BadRequest, NotFound
from airflow.api_connexion.schemas.log_schema import LogResponseObject, logs_schema
from airflow.api_connexion.types import APIResponse
from airflow.exceptions import TaskNotFound
from airflow.models import TaskInstance
from airflow.security import permissions
from airflow.utils.airflow_flask_app import get_airflow_app
from airflow.utils.log.log_reader import TaskLogReader
from airflow.utils.session import NEW_SESSION, provide_session
@security.requires_access(
[
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_DAG_RUN),
(permissions.ACTION_CAN_READ, permissions.RESOURCE_TASK_INSTANCE),
],
)
@provide_session
def get_log(
*,
dag_id: str,
dag_run_id: str,
task_id: str,
task_try_number: int,
full_content: bool = False,
map_index: int = -1,
token: str | None = None,
session: Session = NEW_SESSION,
) -> APIResponse:
"""Get logs for specific task instance"""
key = get_airflow_app().config["SECRET_KEY"]
if not token:
metadata = {}
else:
try:
metadata = URLSafeSerializer(key).loads(token)
except BadSignature:
raise BadRequest("Bad Signature. Please use only the tokens provided by the API.")
if metadata.get('download_logs') and metadata['download_logs']:
full_content = True
if full_content:
metadata['download_logs'] = True
else:
metadata['download_logs'] = False
task_log_reader = TaskLogReader()
if not task_log_reader.supports_read:
raise BadRequest("Task log handler does not support read logs.")
ti = (
session.query(TaskInstance)
.filter(
TaskInstance.task_id == task_id,
TaskInstance.dag_id == dag_id,
TaskInstance.run_id == dag_run_id,
TaskInstance.map_index == map_index,
)
.join(TaskInstance.dag_run)
.one_or_none()
)
if ti is None:
metadata['end_of_log'] = True
raise NotFound(title="TaskInstance not found")
dag = get_airflow_app().dag_bag.get_dag(dag_id)
if dag:
try:
ti.task = dag.get_task(ti.task_id)
except TaskNotFound:
pass
return_type = request.accept_mimetypes.best_match(['text/plain', 'application/json'])
# return_type would be either the above two or None
logs: Any
if return_type == 'application/json' or return_type is None: # default
logs, metadata = task_log_reader.read_log_chunks(ti, task_try_number, metadata)
logs = logs[0] if task_try_number is not None else logs
# we must have token here, so we can safely ignore it
token = URLSafeSerializer(key).dumps(metadata) # type: ignore[assignment]
return logs_schema.dump(LogResponseObject(continuation_token=token, content=logs))
# text/plain. Stream
logs = task_log_reader.read_log_stream(ti, task_try_number, metadata)
return Response(logs, headers={"Content-Type": return_type})
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