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GoogleCloudStorage

class GoogleCloudStorage(BaseObjectStorage):
A class to connect to Google Cloud Storage. It will connect to one bucket in the storage account. Note that Google Cloud Storage does not support api key authentication. Therefore, before using this class, you need to log in with gcloud command line tool and save the credentials first. Parameters:
  • bucket_name (str): The name of the bucket.
  • create_if_not_exists (bool, optional): Whether to create the bucket if it does not exist. Defaults to True.
  • anonymous (bool, optional): Whether to use anonymous access. Defaults to False.
  • References:
  • https: //cloud.google.com/storage
  • https: //cloud.google.com/docs/authentication/api-keys

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init

def __init__(
    self,
    bucket_name: str,
    create_if_not_exists: bool = True,
    anonymous: bool = False
):

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canonicalize_path

def canonicalize_path(file_path: PurePath):
Canonicalize the path for Google Cloud Storage. Parameters:
  • file_path (PurePath): The path to be canonicalized.
Returns: Tuple[str, str]: The canonicalized file key and file name.

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_prepare_and_check

def _prepare_and_check(self):
Check privileges and existence of the bucket.

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_put_file

def _put_file(self, file_key: str, file: File):
Put a file to the GCloud bucket. Parameters:
  • file_key (str): The path to the object in the bucket.
  • file (File): The file to be uploaded.

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_get_file

def _get_file(self, file_key: str, filename: str):
Get a file from the GCloud bucket. Parameters:
  • file_key (str): The path to the object in the bucket.
  • filename (str): The name of the file.
Returns: File: The object from the S3 bucket.

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_upload_file

def _upload_file(self, local_file_path: Path, remote_file_key: str):
Upload a local file to the GCloud bucket. Parameters:
  • local_file_path (Path): The path to the local file to be uploaded.
  • remote_file_key (str): The path to the object in the bucket.

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_download_file

def _download_file(self, local_file_path: Path, remote_file_key: str):
Download a file from the GCloud bucket to the local system. Parameters:
  • local_file_path (Path): The path to the local file to be saved.
  • remote_file_key (str): The key of the object in the bucket.

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_object_exists

def _object_exists(self, file_key: str):
Check if the object exists in the GCloud bucket. Parameters:
  • file_key: The key of the object in the bucket.
Returns: bool: Whether the object exists in the bucket.