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"""Utilities to deal with uploaded files."""
from pathlib import Path
from typing import Union
from werkzeug.utils import secure_filename
from flask import (
request,
current_app as app)
def save_file(key: str, upload_dir: Path) -> Union[Path, bool]:
"""Save the uploaded file and return the path."""
if not bool(request.files.get(key)):
return False
filename = Path(secure_filename(request.files[key].filename))
if not upload_dir.exists():
upload_dir.mkdir()
filepath = Path(upload_dir, filename)
request.files["samples_file"].save(filepath)
return filepath
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