7 posts tagged with "flask"

If you print 1,000 posters with a QR code and the website URL changes next week, a "Static" QR code becomes a pile of wasted paper. The solution is a Dynamic QR code.

Instead of encoding your final destination (like myshop.com/promo-january), you encode a "Short URL" that you control (like myqr.link/offer). When a user scans it, your server looks up where offer should go today and redirects them instantly.

If your deployment environment doesn't support a service mesh like Envoy or an external authorization server (common in simpler, monolithic, or traditional hosting setups), you can certainly move the Casbin authorization check into your Flask application using middleware or decorators.

This approach centralizes authorization logic within the Python code, relying on dedicated extensions like flask-authz or Flask-Casbin.

The fundamental way to integrate Firestore as the policy storage for Casbin is by using a dedicated Adapter. In Casbin, an adapter serves as the persistent layer, handling the LoadPolicy() and SavePolicy() operations between the in-memory enforcer and the database.

1. The Casbin Sidecar Pattern​

A sidecar is a helper container that runs alongside your main application container (the Flask app) inside the same Kubernetes Pod [4]. The sidecar, in this case, is the Envoy Proxy, which intercepts all incoming and outgoing traffic for your Flask application.

The best way to precisely measure the execution time of a function or endpoint in Flask is by using a decorator or middleware. This approach allows you to wrap your functions with timing logic without directly altering the original function's code, which keeps your application clean and maintainable.

Here's a simple example of how to integrate Supabase with a Flask application. This guide will cover how to set up the environment, connect to your Supabase project, and perform basic CRUD (Create, Read, Update, Delete) operations.

Pydantic is widely known for its powerful data validation and parsing capabilities using Python type hints. While it's most popular with FastAPI, it can be elegantly integrated with Flask to improve request validation, input parsing, and response formatting.

This article outlines best practices for combining Flask with Pydantic in a clean, maintainable way.