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,
)
