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Auth & security at scale

OAuth2, JWT, IAM patterns, secrets rotation, and least-privilege service auth.

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Auth & security at scale medium

How to Mock a CORS Allow Origin Whitelist in Python

A decorator-based mock of a CORS middleware that whitelists allowed origins and injects proper Access-Control-Allow-Origin headers while rejecting others.

cors security middleware
Python 
from functools import wraps


class MockCORSConfig:
    def __init__(self, allowed_origins):
        self.allowed_origins = allowed_origins

    def is_origin_allowed(self, origin):
        return origin in self.allowed_origins


def cors_middleware(config):
    def decorator(handler):
        @wraps(handler)
        …
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