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by jfagnani 353 days ago
Interesting server framework! It looks very similar in some ways to a server I started last year out of frustration with Koa and Express called Zipadee: https://github.com/justinfagnani/zipadee?tab=readme-ov-file#...

The templates look basically identical. html-tagged template literals that support streaming and async values and automatically escape values.

What Koa does will allowing strings by be returned with a default HTML mimetype is security malpractice, IMO. It's way to easy to just interpolate user-controlled values.
1 comments
vlucas 353 days ago
Wow that is uncanny. We arrived at almost exactly the same solution and started working on it at almost exactly the same time. I went a little bit further with client islands, file-based routing, custom placeholders for async loading content in templates, etc. since I was looking to replace my own use of Next.js. But man. So close to the same thing. Small world. Cheers!
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jfagnani 353 days ago
Very uncanny! I like it :)

I even have a lot of those things planned, just not enough time!

I didn't do anything that required client-side JS yet, but the first things on that list are out-of-order rendering; watch mode (page reload); and hot module replacement.

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vlucas 353 days ago
I checked your approach. My first attempt looked a lot like yours, but I used an AsyncGenerator. Then I benchmarked it and found out it was slow as heck so I started thinking about other ways to do it.

Iterables/Generators seem like they work well for this problem and it's the first thing I reached for too, but out-of-order streaming is really hard to do with the generator yield syntax. You have to yield things one by one as they come in, and you can't await or you're back to a slow AsyncGenerator. I wound up radically simplifying my template function to just return { content: string, asyncContent: Promise[] } instead and then made different render strategies that handle the resolution of the asyncContent differently: https://github.com/vlucas/hyperspan/blob/main/packages/html/...

I'd love to chat about the approach I used. My email is on my website.

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