http.zig
ctregex.zig
http.zig | ctregex.zig | |
---|---|---|
2 | 1 | |
349 | 118 | |
- | - | |
9.1 | 0.0 | |
5 days ago | 9 months ago | |
Zig | Zig | |
MIT License | - |
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http.zig
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Epoll: The API that powers the modern internet (2022)
I have a somewhat popular HTTP server library for Zig [1]. It started off as a thread-per-connection (with an optional thread pool), but when it became apparent that async wasn't going to be added back into the language any time soon, I switched to using epoll/kqueue.
Both APIs allow you to associate arbitrary data (void ) with the event that you're registering. So when you're notified of the event, you can access this data. In my case, it's a big Conn struct. It contains things like the # of requests on this connection (to enforce a configured max request per connection), a timestamp where it should timeout if there's no activity. The Conn is part of an intrusive linked list, so it has a next: Conn and prev: *Conn. But, what you're probably most curious about, is that it has a Request.State. This has a static buffer ([]u8) that can grow as needed to hold all the received data up until that point (or if we're writing the data, then the buffered data that we have to write). It's important to have a max # of connections and a max request size so you can enforce an upper limit on the maximum memory the library might use. It acts as a state machine to track up to what point it's parsed the request. (since you don't want to have to re-parse the entire request as more bytes trickle in).
It's all half-baked. I can do receiving/sending asynchronously, but the application handler is called synchronously, and if that, for example, calls PG, that's probably also synchronous (since there's no async PG library in Zig). Makes me feel that any modern language needs a cohensive (as in standard library, or de facto standard) concurrency story.
[1] https://github.com/karlseguin/http.zig
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0.11.0 Release Notes
I took a year off, and one of the things I did was learn Zig. I've built a number of libraries, including one of the currently more popular HTTP server libraries (https://github.com/karlseguin/http.zig).
A number of my libraries are used for https://www.aolium.com/ which I decided to write for myself.
I try to write a bit every day with the benefit that I can "waste" time digging into things or exploring likely-to-fail paths.
ctregex.zig
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Compile time regular expression in C++
Since other people are posting other lang implementations... someone did it for zig too (probably less polished than this C++ lib) [1]. It is nice that the regexes can be used at compile time too ().
--
: I think the difference between C++ template language and Zig comptime is that Zig's comptime is almost equal as Zig's regular language, whereas the experience of programming C++ templates almost feels like learning a separate, equally complex language.
1: https://github.com/alexnask/ctregex.zig
What are some alternatives?
zeroman
interface.zig - Dynamic dispatch for zig made easy
libxev - libxev is a cross-platform, high-performance event loop that provides abstractions for non-blocking IO, timers, events, and more and works on Linux (io_uring or epoll), macOS (kqueue), and Wasm + WASI. Available as both a Zig and C API.
zig-regex - A regex implementation for the zig programming language
zigself - An implementation of the Self programming language in Zig
compile-time-regular-expressions - Compile Time Regular Expression in C++
meduza - 🧜♀️ Zig codebase graph generator that emits a Mermaid class diagram.
cl-ppcre - Common Lisp regular expression library
libvlc-zig - Zig bindings for libVLC media framework.
rebar - A biased barometer for gauging the relative speed of some regex engines on a curated set of tasks.
zig-gorillas - A clone of the classic QBasic Gorillas written in the Zig programming language
comptime_hash_map - A statically initiated HashMap