Source code for airflow.providers.common.io.operators.file_transfer

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from __future__ import annotations

from typing import TYPE_CHECKING, Sequence

from airflow.io.path import ObjectStoragePath
from airflow.models import BaseOperator

if TYPE_CHECKING:
    from airflow.utils.context import Context


[docs]class FileTransferOperator(BaseOperator):
    """
    Copies a file from a source to a destination.

    This streams the file from the source to the destination if required
    , so it does not need to fit into memory.

    :param src: The source file path or ObjectStoragePath object.
    :param dst: The destination file path or ObjectStoragePath object.
    :param source_conn_id: The optional source connection id.
    :param dest_conn_id: The optional destination connection id.

    .. seealso::
        For more information on how to use this operator, take a look at the guide:
        :ref:`howto/operator:FileTransferOperator`
    """

[docs]    template_fields: Sequence[str] = ("src", "dst")

    def __init__(
        self,
        *,
        src: str | ObjectStoragePath,
        dst: str | ObjectStoragePath,
        source_conn_id: str | None = None,
        dest_conn_id: str | None = None,
        overwrite: bool = False,
        **kwargs,
    ) -> None:
        super().__init__(**kwargs)

        self.src = src
        self.dst = dst
        self.source_conn_id = source_conn_id
        self.dst_conn_id = dest_conn_id
        self.overwrite = overwrite

[docs]    def execute(self, context: Context) -> None:
        src: ObjectStoragePath
        dst: ObjectStoragePath

        if isinstance(self.src, str):
            src = ObjectStoragePath(self.src, conn_id=self.source_conn_id)
        else:
            src = self.src

        if isinstance(self.dst, str):
            dst = ObjectStoragePath(self.dst, conn_id=self.dst_conn_id)
        else:
            dst = self.dst

        if not self.overwrite:
            if dst.exists() and dst.is_file():
                raise ValueError(f"Destination {dst} already exists")

        src.copy(dst)