airflow sftp_to_s3 源码
airflow sftp_to_s3 代码
文件路径:/airflow/providers/amazon/aws/transfers/sftp_to_s3.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 tempfile import NamedTemporaryFile
from typing import TYPE_CHECKING, Sequence
from urllib.parse import urlparse
from airflow.models import BaseOperator
from airflow.providers.amazon.aws.hooks.s3 import S3Hook
from airflow.providers.ssh.hooks.ssh import SSHHook
if TYPE_CHECKING:
from airflow.utils.context import Context
class SFTPToS3Operator(BaseOperator):
"""
This operator enables the transferring of files from a SFTP server to
Amazon S3.
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:SFTPToS3Operator`
:param sftp_conn_id: The sftp connection id. The name or identifier for
establishing a connection to the SFTP server.
:param sftp_path: The sftp remote path. This is the specified file path
for downloading the file from the SFTP server.
:param s3_conn_id: The s3 connection id. The name or identifier for
establishing a connection to S3
:param s3_bucket: The targeted s3 bucket. This is the S3 bucket to where
the file is uploaded.
:param s3_key: The targeted s3 key. This is the specified path for
uploading the file to S3.
:param use_temp_file: If True, copies file first to local,
if False streams file from SFTP to S3.
"""
template_fields: Sequence[str] = ('s3_key', 'sftp_path')
def __init__(
self,
*,
s3_bucket: str,
s3_key: str,
sftp_path: str,
sftp_conn_id: str = 'ssh_default',
s3_conn_id: str = 'aws_default',
use_temp_file: bool = True,
**kwargs,
) -> None:
super().__init__(**kwargs)
self.sftp_conn_id = sftp_conn_id
self.sftp_path = sftp_path
self.s3_bucket = s3_bucket
self.s3_key = s3_key
self.s3_conn_id = s3_conn_id
self.use_temp_file = use_temp_file
@staticmethod
def get_s3_key(s3_key: str) -> str:
"""This parses the correct format for S3 keys regardless of how the S3 url is passed."""
parsed_s3_key = urlparse(s3_key)
return parsed_s3_key.path.lstrip('/')
def execute(self, context: Context) -> None:
self.s3_key = self.get_s3_key(self.s3_key)
ssh_hook = SSHHook(ssh_conn_id=self.sftp_conn_id)
s3_hook = S3Hook(self.s3_conn_id)
sftp_client = ssh_hook.get_conn().open_sftp()
if self.use_temp_file:
with NamedTemporaryFile("w") as f:
sftp_client.get(self.sftp_path, f.name)
s3_hook.load_file(filename=f.name, key=self.s3_key, bucket_name=self.s3_bucket, replace=True)
else:
with sftp_client.file(self.sftp_path, mode='rb') as data:
s3_hook.get_conn().upload_fileobj(data, self.s3_bucket, self.s3_key, Callback=self.log.info)
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