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SFTP to Google Cloud Storage Transfer Operator
==============================================

Google has a service `Google Cloud Storage <https://cloud.google.com/storage/>`__. This service is
used to store large data from various applications.
SFTP (SSH File Transfer Protocol) is a secure file transfer protocol.
It runs over the SSH protocol. It supports the full security and authentication functionality of the SSH.

Prerequisite Tasks
^^^^^^^^^^^^^^^^^^

.. include:: /operators/_partials/prerequisite_tasks.rst

.. _howto/operator:SFTPToGCSOperator:

Operator
^^^^^^^^

Transfer files between SFTP and Google Storage is performed with the
:class:`~airflow.providers.google.cloud.transfers.sftp_to_gcs.SFTPToGCSOperator` operator.

Use :ref:`Jinja templating <concepts:jinja-templating>` with
:template-fields:`airflow.providers.google.cloud.transfers.sftp_to_gcs.SFTPToGCSOperator`
to define values dynamically.

Copying single files
--------------------

The following Operator copies a single file.

.. exampleinclude:: /../../google/tests/system/google/cloud/gcs/example_sftp_to_gcs.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_sftp_to_gcs_copy_single_file]
    :end-before: [END howto_operator_sftp_to_gcs_copy_single_file]

Moving a single file
--------------------

To move the file use the ``move_object`` parameter. Once the file is copied to Google Storage,
the original file from the SFTP is deleted.
The ``destination_path`` parameter defines the full path of the file in the bucket.

.. exampleinclude:: /../../google/tests/system/google/cloud/gcs/example_sftp_to_gcs.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_sftp_to_gcs_move_single_file_destination]
    :end-before: [END howto_operator_sftp_to_gcs_move_single_file_destination]


Copying directory
-----------------

Use the ``wildcard`` in ``source_path`` parameter to copy the directory.

.. exampleinclude:: /../../google/tests/system/google/cloud/gcs/example_sftp_to_gcs.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_sftp_to_gcs_copy_directory]
    :end-before: [END howto_operator_sftp_to_gcs_copy_directory]

Moving specific files
---------------------

Use the ``wildcard`` in ``source_path`` parameter to move the specific files.
You can use only one wildcard within your path.
The ``destination_path`` defines the path that is prefixed to all copied files,
e.g. ``tests_sftp_hook_dir/subdir/parent-1.bin`` is copied to ``specific_files/parent-1.bin``,
and ``tests_sftp_hook_dir/subdir/parent-2.bin`` is copied to ``specific_files/parent-2.bin`` .
``tests_sftp_hook_dir/subdir/parent-3.txt`` is skipped.

.. exampleinclude:: /../../google/tests/system/google/cloud/gcs/example_sftp_to_gcs.py
    :language: python
    :dedent: 4
    :start-after: [START howto_operator_sftp_to_gcs_move_specific_files]
    :end-before: [END howto_operator_sftp_to_gcs_move_specific_files]

Reference
^^^^^^^^^

For more information, see

* `Google Cloud Storage Documentation <https://cloud.google.com/storage/>`__
