airflow redshift 源码
airflow redshift 代码
文件路径：/airflow/providers/amazon/aws/utils/redshift.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
import logging
from botocore.credentials import ReadOnlyCredentials
log = logging.getLogger(__name__)
def build_credentials_block(credentials: ReadOnlyCredentials) -> str:
"""
Generate AWS credentials block for Redshift COPY and UNLOAD
commands, as noted in AWS docs
https://docs.aws.amazon.com/redshift/latest/dg/copy-parameters-authorization.html#copy-credentials
:param credentials: ReadOnlyCredentials object from `botocore`
:return: str
"""
if credentials.token:
log.debug("STS token found in credentials, including it in the command")
# these credentials are obtained from AWS STS
# so the token must be included in the CREDENTIALS clause
credentials_line = (
f"aws_access_key_id={credentials.access_key};"
f"aws_secret_access_key={credentials.secret_key};"
f"token={credentials.token}"
)
else:
credentials_line = (
f"aws_access_key_id={credentials.access_key};aws_secret_access_key={credentials.secret_key}"
)
return credentials_line
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