Python Flask snippet for serving a file at an endpoint with a file name derived from an argument passed in, specifically the ID of the file.

flask_serve_dynamic_file.py

from flask import Flask, send_file, request

app = Flask(__name__)

@app.route('/download-file/<file_id>')
def download_file(file_id):
    # Construct file path using file ID
    file_path = f'path/to/your/files/{file_id}.extension'
    # Serve the file for download
    return send_file(file_path, as_attachment=True, download_name=f'{file_id}.extension')

if __name__ == '__main__':
    app.run(debug=True)