http.zig | otp | |
---|---|---|
2 | 24 | |
349 | 11,067 | |
- | 0.5% | |
9.1 | 10.0 | |
5 days ago | 3 days ago | |
Zig | Erlang | |
MIT License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
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.
otp
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Install mutiple Erlang and Elixir with vfox
Theoretically, you could install any version that appears in https://github.com/erlang/otp/releases. Since it is compiled and installed from source, the installation process will take some time. When you see the following message, the installation is complete.
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Perfect Elixir: Environment Setup
Iām on MacOS and erlang.org, elixir-lang.org, and postgresql.org all suggest installation via Homebrew, which is a very popular package manager for MacOS.
- Scheduling Internals
- Epoll: The API that powers the modern internet (2022)
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Elixir v1.15 released
You can read my original report and subsequent PRs in Erlang/OTP here: https://github.com/erlang/otp/issues/5811
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Open Sourcing Erlfuzz
- a massive speedup of a common static analyzer for Erlang (https://github.com/erlang/otp/pull/5997)
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Why are there so many languages?
Funny that you should mention Erlang. Looking at the Github for Erlang, it appears that the source for Erlang is 16.8% written in C. I would bet these are not the least important bits of the whole thing. So, Erlang depends on C.
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Erlang: More Optimizations in the Compiler and JIT
It looks more like some of the JIT improvements made it profitable to manually unroll some loops in the base64 module: https://github.com/erlang/otp/commit/a03cf1601605dee767cd9d5...
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Mixing sync and async views in the same application
https://github.com/erlang/otp as far as I know. It's somewhat confusing and I honestly couldn't say exactly where the BEAM VM or OTP or ERTS (Erlang Runtime System) start and end. I've never dug into it. I just install Elixir and sometimes Erlang through the ASDF tool, which does all the compiling for me.
- When people send a https request to my custom web server, it crashes the entire system. How do I fortify my system not to accept em?
What are some alternatives?
ctregex.zig - Compile time regular expressions in zig
protoactor-go - Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin
zeroman
Elixir - Elixir is a dynamic, functional language for building scalable and maintainable applications
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.
calypso - Calypso is a mostly imperative language with some functional influences that is focused on flexibility and simplicity.
zigself - An implementation of the Self programming language in Zig
scryer-prolog - A modern Prolog implementation written mostly in Rust.
meduza - š§āāļø Zig codebase graph generator that emits a Mermaid class diagram.
caramel - :candy: a functional language for building type-safe, scalable, and maintainable applications
libvlc-zig - Zig bindings for libVLC media framework.
cdk-emqx-cluster