Source code for airflow.providers.amazon.aws.transfers.imap_attachment_to_s3

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"""This module allows you to transfer mail attachments from a mail server into s3 bucket."""
import warnings
from typing import TYPE_CHECKING, Optional, Sequence

from airflow.models import BaseOperator
from airflow.providers.amazon.aws.hooks.s3 import S3Hook
from airflow.providers.imap.hooks.imap import ImapHook

if TYPE_CHECKING:
    from airflow.utils.context import Context

_DEPRECATION_MSG = (
    "The s3_conn_id parameter has been deprecated. You should pass instead the aws_conn_id parameter."
)


[docs]class ImapAttachmentToS3Operator(BaseOperator): """ Transfers a mail attachment from a mail server into s3 bucket. .. seealso:: For more information on how to use this operator, take a look at the guide: :ref:`howto/operator:ImapAttachmentToS3Operator` :param imap_attachment_name: The file name of the mail attachment that you want to transfer. :param s3_bucket: The targeted s3 bucket. This is the S3 bucket where the file will be downloaded. :param s3_key: The destination file name in the s3 bucket for the attachment. :param imap_check_regex: If set checks the `imap_attachment_name` for a regular expression. :param imap_mail_folder: The folder on the mail server to look for the attachment. :param imap_mail_filter: If set other than 'All' only specific mails will be checked. See :py:meth:`imaplib.IMAP4.search` for details. :param s3_overwrite: If set overwrites the s3 key if already exists. :param imap_conn_id: The reference to the connection details of the mail server. :param aws_conn_id: AWS connection to use. """
[docs] template_fields: Sequence[str] = ('imap_attachment_name', 's3_key', 'imap_mail_filter')
def __init__( self, *, imap_attachment_name: str, s3_bucket: str, s3_key: str, imap_check_regex: bool = False, imap_mail_folder: str = 'INBOX', imap_mail_filter: str = 'All', s3_overwrite: bool = False, imap_conn_id: str = 'imap_default', s3_conn_id: Optional[str] = None, aws_conn_id: str = 'aws_default', **kwargs, ) -> None: super().__init__(**kwargs) if s3_conn_id: warnings.warn(_DEPRECATION_MSG, DeprecationWarning, stacklevel=3) aws_conn_id = s3_conn_id self.imap_attachment_name = imap_attachment_name self.s3_bucket = s3_bucket self.s3_key = s3_key self.imap_check_regex = imap_check_regex self.imap_mail_folder = imap_mail_folder self.imap_mail_filter = imap_mail_filter self.s3_overwrite = s3_overwrite self.imap_conn_id = imap_conn_id self.aws_conn_id = aws_conn_id
[docs] def execute(self, context: 'Context') -> None: """ This function executes the transfer from the email server (via imap) into s3. :param context: The context while executing. """ self.log.info( 'Transferring mail attachment %s from mail server via imap to s3 key %s...', self.imap_attachment_name, self.s3_key, ) with ImapHook(imap_conn_id=self.imap_conn_id) as imap_hook: imap_mail_attachments = imap_hook.retrieve_mail_attachments( name=self.imap_attachment_name, check_regex=self.imap_check_regex, latest_only=True, mail_folder=self.imap_mail_folder, mail_filter=self.imap_mail_filter, ) s3_hook = S3Hook(aws_conn_id=self.aws_conn_id) s3_hook.load_bytes( bytes_data=imap_mail_attachments[0][1], bucket_name=self.s3_bucket, key=self.s3_key, replace=self.s3_overwrite,
)

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