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