Learn how to harden a Flask app using the flask-security library (a Helmet-style approach): install via pip, then add an after_request handler that sets four key headers—X-Frame-Options (SAMEORIGIN), Content-Security-Policy (restrict sources), X-XSS-Protection (1; mode=block), and X-Content-Type-Options (nosniff)—to mitigate XSS, clickjacking, and MIME-sniffing risks.
Node.js Helmet is a middleware package providing security-related HTTP headers for your application, including Content Security Policy (CSP), Cross-Origin Resource Sharing (CORS), and more, to prevent various types of attacks and protect user data. It's designed to be simple and easy to use, making it an ideal choice for developers who want to enhance their app's security without diving deep into technicalities.
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