HTTP server in different languages

Problem statement

The server listens on localhost:8000 and exposes /version endpoint.

The /version endpoint returns a RESTful JSON response with the "version" fields. The payload should be serialized to JSON from a struct or class, not printed as a simple string.

Other routes, root included, should return 404.

When the server runs, it should respond to curl http://localhost:8000/version or in the web browser.

Used compilers and interpreters

language	version	framwork	source	run command
zig	0.14.0	httpz	main.zig	make zig
rustc	1.82.0	warp	main.rs	make rust
swift	6.0	vapor	main.swift	make swift
go	1.23	-	main.go	make go
v	0.4.8	-	main.v	make v
crystal	1.14.0	-	main.cr	make crystal
assember	arm64	macos/libc	main.s	make arm64
d/ldc	1.40	vibe	main.d	make d
ruby	3.3.6	sinatra	main.rb	make ruby
dart	3.5.4	-	main.dart	make dart
deno	2.0.6	-	main-deno.ts	make deno
bun	1.1.34	-	main-bun.ts	make bun
node	23.1.0	-	main.js	make node
php	8.3.13	-	main.php	make php
python	3.13	fastapi	main.py	make python
pascal/fpc	3.2.2	-	main.pas	make fpc
lua	5.4.7	copas	main.lua	make lua
csharp/dotnet	9.0.0	-	main.cs	make cs
perl	5.34.1	mojolicious	main.pl	make perl

All implementations above are tested on macOS 15.1 Sequoia.

Run client

make q or curl -q http://localhost:8000/version.

Contributions

C# version is rewritten by @neon-sunset

Swift version is rewritten by @Frizlab

arm64 assembly version is based on @dmtrKovalenko's macos-assembly-http-server