Handling file uploads with Flask and ensuring unique filenames
I'm experimenting with I tried several approaches but none seem to work..... After trying multiple solutions online, I still can't figure this out. I'm working on a Flask application (version 2.0.1) that allows users to upload profile pictures. However, I've encountered an scenario where if two users upload a file with the same name, it overwrites the existing file on the server, leading to potential data loss. I want to ensure that each uploaded file has a unique name and avoid overwriting any existing files. I tried using the `uuid` library to generate a unique filename based on the original filename, but I'm still not confident in my approach. Here's the code I've implemented: ```python import os from flask import Flask, request, redirect, url_for from werkzeug.utils import secure_filename import uuid app = Flask(__name__) app.config['UPLOAD_FOLDER'] = 'uploads/' @app.route('/upload', methods=['POST']) def upload_file(): if 'file' not in request.files: return 'No file part', 400 file = request.files['file'] if file.filename == '': return 'No selected file', 400 filename = secure_filename(file.filename) unique_filename = f'{uuid.uuid4()}_{filename}' file.save(os.path.join(app.config['UPLOAD_FOLDER'], unique_filename)) return redirect(url_for('uploaded_file', filename=unique_filename)) ``` The approach works, but I'm concerned about how this may affect the user experience. Users might want to overwrite their existing profile pictures, and I want to handle that gracefully. I thought of adding a confirmation step before saving, but I also want to keep it efficient. Additionally, I'm getting a `FileNotFoundError` when I run the app unless the `uploads` directory already exists. Should I add a check to create this directory if it doesn't exist, or is there a more idiomatic way in Flask to handle such scenarios? Any best practices or design patterns I should consider for file uploads with Flask? Any insight would be greatly appreciated! For context: I'm using Python on macOS. How would you solve this? For context: I'm using Python on macOS. Any help would be greatly appreciated! My development environment is Debian. Any ideas what could be causing this? I'd be grateful for any help. This issue appeared after updating to Python 3.10. What am I doing wrong?