Actix-web 与 Axum 架构性能实测¶

// src/main.rs (Axum 示例)
use axum::{
    extract::{Path, State},
    http::StatusCode,
    response::IntoResponse,
    routing::{get, post},
    Json, Router,
};
use serde::{Deserialize, Serialize};
use std::sync::Arc;
use tokio::net::TcpListener;
use tower_http::trace::TraceLayer;

#[derive(Clone)]
struct AppState {
    db_pool: Arc<String>, // 实际业务中为 sqlx::PgPool
}

#[derive(Serialize, Deserialize)]
struct UserDto {
    id: u64,
    username: String,
    role: String,
}

// 强类型 Handler，参数提取器自动完成校验与反序列化
async fn get_user_by_id(
    Path(user_id): Path<u64>,
    State(state): State<AppState>,
) -> Result<Json<UserDto>, StatusCode> {
    if user_id == 0 {
        return Err(StatusCode::NOT_FOUND);
    }

    Ok(Json(UserDto {
        id: user_id,
        username: format!("user_{}", user_id),
        role: "admin".to_string(),
    }))
}

#[tokio::main]
async fn main() {
    tracing_subscriber::fmt::init();

    let shared_state = AppState {
        db_pool: Arc::new("postgresql://localhost:5432/app".to_string()),
    };

    let app = Router::new()
        .route("/api/users/{id}", get(get_user_by_id))
        .layer(TraceLayer::new_for_http())
        .with_state(shared_state);

    let listener = TcpListener::bind("0.0.0.0:8080").await.unwrap();
    println!("🚀 Axum HTTP server running on port 8080");
    axum::serve(listener, app).await.unwrap();
}