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You can try it out at

I don't log which passwords I generate, but if you're paranoid about security you probably should just generate the passwords locally.

This project started off using Flask. Then I realized that was overkill. I decdied to make this server be able to run with pure Python, because there's literally no reason not to.

The easiest way to try it out for yourself:

python3 -m pip install --user chbs

Then you can run:

chbs -h

And that should tell you everything you need to know.

Or, clone this repo and run:

python3 chbs/

And then connect to it:

$ curl localhost:8000
correct horse battery staple$

Yeah. It won't return an ending newline. That's intentional.

I also decided that for funsies I should make this into a test. What is the difference between just:

  • Single threaded server.
  • A server using select.
  • A server using epoll.
  • A multithreaded server.
  • A server using asyncio.
  • A server using an aiohttp server.

My theory is that a single threaded server should be about as good as it gets. Or possibly using epoll or select? Given the size of the data that we're returning, I don't think that I'll get a lot of difference between any of these servers. We shall see.

The first server that I will produce will be just a single threaded server using raw sockets and listen(20). That seems like a reasonably large queue? To be honest, I'm not entirely certain how that works - in the past I've used huge numbers or smaller numbers and didn't really see a difference.