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from __future__ import annotations

from tempfile import NamedTemporaryFile
from typing import TYPE_CHECKING, Sequence
from urllib.parse import urlsplit

from airflow.models import BaseOperator
from import S3Hook
from airflow.providers.ssh.hooks.ssh import SSHHook

    from airflow.utils.context import Context

[docs]class S3ToSFTPOperator(BaseOperator): """ This operator enables the transferring of files from S3 to a SFTP server. .. seealso:: For more information on how to use this operator, take a look at the guide: :ref:`howto/operator:S3ToSFTPOperator` :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 uploading file to the SFTP server. :param aws_conn_id: aws connection to use :param s3_bucket: The targeted s3 bucket. This is the S3 bucket from where the file is downloaded. :param s3_key: The targeted s3 key. This is the specified file path for downloading the file from S3. """
[docs] template_fields: Sequence[str] = ("s3_key", "sftp_path", "s3_bucket")
def __init__( self, *, s3_bucket: str, s3_key: str, sftp_path: str, sftp_conn_id: str = "ssh_default", aws_conn_id: str = "aws_default", **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.aws_conn_id = aws_conn_id @staticmethod
[docs] def get_s3_key(s3_key: str) -> str: """Parse the correct format for S3 keys regardless of how the S3 url is passed.""" parsed_s3_key = urlsplit(s3_key) return parsed_s3_key.path.lstrip("/")
[docs] 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.aws_conn_id) s3_client = s3_hook.get_conn() sftp_client = ssh_hook.get_conn().open_sftp() with NamedTemporaryFile("w") as f: s3_client.download_file(self.s3_bucket, self.s3_key, sftp_client.put(, self.sftp_path)

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