Flask

Content Security Policy is one of those headers teams keep meaning to add, then postpone until they hit an XSS bug or a compliance checklist. I’ve seen both. The good news: Django and Flask make CSP pretty manageable once you stop treating it like a giant scary string. This guide shows how to wire up CSP in both frameworks, how to handle nonces, and how to avoid the usual mistakes that turn your “secure” policy into unsafe-inline soup. ...