Simon Willison’s Weblog

21st December 2021

TIL Adding a robots.txt using Cloudflare workers — I got an unexpected traffic spike to https://russian-ira-facebook-ads.datasettes.com/ - which runs on Cloud Run - and decided to use `robots.txt` to block crawlers.

None

Posted 21st December 2021 at 11:07 pm

Recent articles

DeepSeek V4 - almost on the frontier, a fraction of the price - 24th April 2026
Extract PDF text in your browser with LiteParse for the web - 23rd April 2026
A pelican for GPT-5.5 via the semi-official Codex backdoor API - 23rd April 2026

This is a beat by Simon Willison, posted on 21st December 2021.

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