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from collections.abc import Generator
from contextlib import closing
import oss2 as aliyun_s3
from flask import Flask
from extensions.storage.base_storage import BaseStorage
class AliyunStorage(BaseStorage):
"""Implementation for aliyun storage.
"""
def __init__(self, app: Flask):
super().__init__(app)
app_config = self.app.config
self.bucket_name = app_config.get('ALIYUN_OSS_BUCKET_NAME')
oss_auth_method = aliyun_s3.Auth
region = None
if app_config.get('ALIYUN_OSS_AUTH_VERSION') == 'v4':
oss_auth_method = aliyun_s3.AuthV4
region = app_config.get('ALIYUN_OSS_REGION')
oss_auth = oss_auth_method(app_config.get('ALIYUN_OSS_ACCESS_KEY'), app_config.get('ALIYUN_OSS_SECRET_KEY'))
self.client = aliyun_s3.Bucket(
oss_auth,
app_config.get('ALIYUN_OSS_ENDPOINT'),
self.bucket_name,
connect_timeout=30,
region=region,
)
def save(self, filename, data):
self.client.put_object(filename, data)
def load_once(self, filename: str) -> bytes:
with closing(self.client.get_object(filename)) as obj:
data = obj.read()
return data
def load_stream(self, filename: str) -> Generator:
def generate(filename: str = filename) -> Generator:
with closing(self.client.get_object(filename)) as obj:
while chunk := obj.read(4096):
yield chunk
return generate()
def download(self, filename, target_filepath):
self.client.get_object_to_file(filename, target_filepath)
def exists(self, filename):
return self.client.object_exists(filename)
def delete(self, filename):
self.client.delete_object(filename)
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