mirror of
https://gitee.com/dify_ai/dify.git
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144 lines
5.0 KiB
Python
144 lines
5.0 KiB
Python
import os
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import shutil
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from contextlib import closing
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from typing import Union, Generator
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import boto3
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from botocore.exceptions import ClientError
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from flask import Flask
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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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)
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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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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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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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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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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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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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storage = Storage()
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def init_app(app: Flask):
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storage.init_app(app)
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