Axum — Ergonomic Modular Web Framework for Rust

# Cargo.toml
[dependencies]
axum = "0.8"
tokio = { version = "1", features = ["full"] }
serde = { version = "1", features = ["derive"] }
serde_json = "1"

use axum::{routing::{get, post}, Json, Router};
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Asset {
    repo: String,
    stars: u32,
}

async fn list_assets() -> Json<Vec<Asset>> {
    Json(vec![
        Asset { repo: "react".into(), stars: 230000 },
    ])
}

async fn create_asset(Json(payload): Json<Asset>) -> Json<Asset> {
    Json(payload)
}

#[tokio::main]
async fn main() {
    let app = Router::new()
        .route("/api/assets", get(list_assets).post(create_asset));

    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
    axum::serve(listener, app).await.unwrap();
}