I plan to release #iocaine 3.1.0 next Friday, on the 28th. It's a small update, the minor version bump is because the built-in request handler is now able to respond with a non-200 status when generating garbage (but the status is always a fixed code).
I'm also going to teach it to be able to match ASNs, and will ship with Alibaba & Huawei blocked by default.
That should bring the built-in handler even closer to Nam-Shub of Enki at a fraction of the complexity.