Simon Willison’s Weblog

Is your Rails app XSS safe? SafeErb is an interesting take on auto-escaping for Rails: it throws an exception if you try to render a string that hasn’t been untainted yet.

Posted 10th January 2008 at 6:46 pm

Recent articles

My review of Claude's new Code Interpreter, released under a very confusing name - 9th September 2025
Recreating the Apollo AI adoption rate chart with GPT-5, Python and Pyodide - 9th September 2025
GPT-5 Thinking in ChatGPT (aka Research Goblin) is shockingly good at search - 6th September 2025

rails 72 ruby 72 safeerb 1 security 543 xss 60

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe