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import os
import shutil
from collections.abc import Generator
from flask import Flask
from extensions.storage.base_storage import BaseStorage
class LocalStorage(BaseStorage):
"""Implementation for local storage.
"""
def __init__(self, app: Flask):
super().__init__(app)
folder = self.app.config.get('STORAGE_LOCAL_PATH')
if not os.path.isabs(folder):
folder = os.path.join(app.root_path, folder)
self.folder = folder
def save(self, filename, data):
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
folder = os.path.dirname(filename)
os.makedirs(folder, exist_ok=True)
with open(os.path.join(os.getcwd(), filename), "wb") as f:
f.write(data)
def load_once(self, filename: str) -> bytes:
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
if not os.path.exists(filename):
raise FileNotFoundError("File not found")
with open(filename, "rb") as f:
data = f.read()
return data
def load_stream(self, filename: str) -> Generator:
def generate(filename: str = filename) -> Generator:
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
if not os.path.exists(filename):
raise FileNotFoundError("File not found")
with open(filename, "rb") as f:
while chunk := f.read(4096): # Read in chunks of 4KB
yield chunk
return generate()
def download(self, filename, target_filepath):
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
if not os.path.exists(filename):
raise FileNotFoundError("File not found")
shutil.copyfile(filename, target_filepath)
def exists(self, filename):
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
return os.path.exists(filename)
def delete(self, filename):
if not self.folder or self.folder.endswith('/'):
filename = self.folder + filename
else:
filename = self.folder + '/' + filename
if os.path.exists(filename):
os.remove(filename)
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