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| import base64 | |
| import io | |
| import json | |
| from collections.abc import Generator | |
| from google.cloud import storage as google_cloud_storage | |
| from configs import dify_config | |
| from extensions.storage.base_storage import BaseStorage | |
| class GoogleCloudStorage(BaseStorage): | |
| """Implementation for Google Cloud storage.""" | |
| def __init__(self): | |
| super().__init__() | |
| self.bucket_name = dify_config.GOOGLE_STORAGE_BUCKET_NAME | |
| service_account_json_str = dify_config.GOOGLE_STORAGE_SERVICE_ACCOUNT_JSON_BASE64 | |
| # if service_account_json_str is empty, use Application Default Credentials | |
| if service_account_json_str: | |
| service_account_json = base64.b64decode(service_account_json_str).decode("utf-8") | |
| # convert str to object | |
| service_account_obj = json.loads(service_account_json) | |
| self.client = google_cloud_storage.Client.from_service_account_info(service_account_obj) | |
| else: | |
| self.client = google_cloud_storage.Client() | |
| def save(self, filename, data): | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| blob = bucket.blob(filename) | |
| with io.BytesIO(data) as stream: | |
| blob.upload_from_file(stream) | |
| def load_once(self, filename: str) -> bytes: | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| blob = bucket.get_blob(filename) | |
| data = blob.download_as_bytes() | |
| return data | |
| def load_stream(self, filename: str) -> Generator: | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| blob = bucket.get_blob(filename) | |
| with blob.open(mode="rb") as blob_stream: | |
| while chunk := blob_stream.read(4096): | |
| yield chunk | |
| def download(self, filename, target_filepath): | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| blob = bucket.get_blob(filename) | |
| blob.download_to_filename(target_filepath) | |
| def exists(self, filename): | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| blob = bucket.blob(filename) | |
| return blob.exists() | |
| def delete(self, filename): | |
| bucket = self.client.get_bucket(self.bucket_name) | |
| bucket.delete_blob(filename) | |