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251 lines
11 KiB
Python
251 lines
11 KiB
Python
import base64
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import os
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import shutil
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from collections.abc import Generator
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from contextlib import closing
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from datetime import datetime, timedelta, timezone
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from typing import Union
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import boto3
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import oss2 as aliyun_s3
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from azure.storage.blob import AccountSasPermissions, BlobServiceClient, ResourceTypes, generate_account_sas
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from botocore.client import Config
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from botocore.exceptions import ClientError
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from flask import Flask
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from google.cloud import storage as GoogleStorage
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class Storage:
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def __init__(self):
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self.storage_type = None
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self.bucket_name = None
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self.client = None
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self.folder = None
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def init_app(self, app: Flask):
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self.storage_type = app.config.get('STORAGE_TYPE')
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if self.storage_type == 's3':
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self.bucket_name = app.config.get('S3_BUCKET_NAME')
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self.client = boto3.client(
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's3',
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aws_secret_access_key=app.config.get('S3_SECRET_KEY'),
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aws_access_key_id=app.config.get('S3_ACCESS_KEY'),
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endpoint_url=app.config.get('S3_ENDPOINT'),
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region_name=app.config.get('S3_REGION'),
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config=Config(s3={'addressing_style': app.config.get('S3_ADDRESS_STYLE')})
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)
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elif self.storage_type == 'azure-blob':
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self.bucket_name = app.config.get('AZURE_BLOB_CONTAINER_NAME')
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sas_token = generate_account_sas(
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account_name=app.config.get('AZURE_BLOB_ACCOUNT_NAME'),
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account_key=app.config.get('AZURE_BLOB_ACCOUNT_KEY'),
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resource_types=ResourceTypes(service=True, container=True, object=True),
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permission=AccountSasPermissions(read=True, write=True, delete=True, list=True, add=True, create=True),
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expiry=datetime.now(timezone.utc).replace(tzinfo=None) + timedelta(hours=1)
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)
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self.client = BlobServiceClient(account_url=app.config.get('AZURE_BLOB_ACCOUNT_URL'),
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credential=sas_token)
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elif self.storage_type == 'aliyun-oss':
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self.bucket_name = app.config.get('ALIYUN_OSS_BUCKET_NAME')
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self.client = aliyun_s3.Bucket(
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aliyun_s3.Auth(app.config.get('ALIYUN_OSS_ACCESS_KEY'), app.config.get('ALIYUN_OSS_SECRET_KEY')),
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app.config.get('ALIYUN_OSS_ENDPOINT'),
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self.bucket_name,
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connect_timeout=30
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)
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elif self.storage_type == 'google-storage':
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self.bucket_name = app.config.get('GOOGLE_STORAGE_BUCKET_NAME')
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service_account_json = base64.b64decode(app.config.get('GOOGLE_STORAGE_SERVICE_ACCOUNT_JSON_BASE64')).decode('utf-8')
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self.client = GoogleStorage.Client().from_service_account_json(service_account_json)
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else:
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self.folder = app.config.get('STORAGE_LOCAL_PATH')
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if not os.path.isabs(self.folder):
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self.folder = os.path.join(app.root_path, self.folder)
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def save(self, filename, data):
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if self.storage_type == 's3':
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self.client.put_object(Bucket=self.bucket_name, Key=filename, Body=data)
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elif self.storage_type == 'azure-blob':
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blob_container = self.client.get_container_client(container=self.bucket_name)
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blob_container.upload_blob(filename, data)
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elif self.storage_type == 'aliyun-oss':
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self.client.put_object(filename, data)
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elif self.storage_type == 'google-storage':
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bucket = self.client.get_bucket(self.bucket_name)
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blob = bucket.blob(filename)
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blob.upload_from_file(data)
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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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folder = os.path.dirname(filename)
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os.makedirs(folder, exist_ok=True)
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with open(os.path.join(os.getcwd(), filename), "wb") as f:
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f.write(data)
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def load(self, filename: str, stream: bool = False) -> Union[bytes, Generator]:
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if stream:
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return self.load_stream(filename)
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else:
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return self.load_once(filename)
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def load_once(self, filename: str) -> bytes:
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if self.storage_type == 's3':
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try:
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with closing(self.client) as client:
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data = client.get_object(Bucket=self.bucket_name, Key=filename)['Body'].read()
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except ClientError as ex:
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if ex.response['Error']['Code'] == 'NoSuchKey':
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raise FileNotFoundError("File not found")
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else:
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raise
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elif self.storage_type == 'azure-blob':
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blob = self.client.get_container_client(container=self.bucket_name)
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blob = blob.get_blob_client(blob=filename)
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data = blob.download_blob().readall()
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elif self.storage_type == 'aliyun-oss':
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with closing(self.client.get_object(filename)) as obj:
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data = obj.read()
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elif self.storage_type == 'google-storage':
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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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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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if not os.path.exists(filename):
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raise FileNotFoundError("File not found")
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with open(filename, "rb") as f:
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data = f.read()
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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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if self.storage_type == 's3':
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try:
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with closing(self.client) as client:
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response = client.get_object(Bucket=self.bucket_name, Key=filename)
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for chunk in response['Body'].iter_chunks():
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yield chunk
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except ClientError as ex:
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if ex.response['Error']['Code'] == 'NoSuchKey':
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raise FileNotFoundError("File not found")
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else:
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raise
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elif self.storage_type == 'azure-blob':
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blob = self.client.get_blob_client(container=self.bucket_name, blob=filename)
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with closing(blob.download_blob()) as blob_stream:
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while chunk := blob_stream.readall(4096):
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yield chunk
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elif self.storage_type == 'aliyun-oss':
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with closing(self.client.get_object(filename)) as obj:
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while chunk := obj.read(4096):
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yield chunk
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elif self.storage_type == 'google-storage':
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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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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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if not os.path.exists(filename):
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raise FileNotFoundError("File not found")
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with open(filename, "rb") as f:
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while chunk := f.read(4096): # Read in chunks of 4KB
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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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if self.storage_type == 's3':
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with closing(self.client) as client:
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client.download_file(self.bucket_name, filename, target_filepath)
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elif self.storage_type == 'azure-blob':
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blob = self.client.get_blob_client(container=self.bucket_name, blob=filename)
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with open(target_filepath, "wb") as my_blob:
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blob_data = blob.download_blob()
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blob_data.readinto(my_blob)
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elif self.storage_type == 'aliyun-oss':
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self.client.get_object_to_file(filename, target_filepath)
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elif self.storage_type == 'google-storage':
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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 open(target_filepath, "wb") as my_blob:
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blob_data = blob.download_blob()
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blob_data.readinto(my_blob)
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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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if not os.path.exists(filename):
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raise FileNotFoundError("File not found")
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shutil.copyfile(filename, target_filepath)
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def exists(self, filename):
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if self.storage_type == 's3':
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with closing(self.client) as client:
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try:
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client.head_object(Bucket=self.bucket_name, Key=filename)
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return True
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except:
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return False
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elif self.storage_type == 'azure-blob':
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blob = self.client.get_blob_client(container=self.bucket_name, blob=filename)
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return blob.exists()
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elif self.storage_type == 'aliyun-oss':
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return self.client.object_exists(filename)
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elif self.storage_type == 'google-storage':
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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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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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return os.path.exists(filename)
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def delete(self, filename):
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if self.storage_type == 's3':
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self.client.delete_object(Bucket=self.bucket_name, Key=filename)
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elif self.storage_type == 'azure-blob':
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blob_container = self.client.get_container_client(container=self.bucket_name)
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blob_container.delete_blob(filename)
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elif self.storage_type == 'aliyun-oss':
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self.client.delete_object(filename)
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elif self.storage_type == 'google-storage':
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bucket = self.client.get_bucket(self.bucket_name)
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bucket.delete_blob(filename)
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else:
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if not self.folder or self.folder.endswith('/'):
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filename = self.folder + filename
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else:
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filename = self.folder + '/' + filename
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if os.path.exists(filename):
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os.remove(filename)
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storage = Storage()
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def init_app(app: Flask):
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storage.init_app(app)
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