如何在actix-web路由中缓存或记录数据？

use actix_web::{web, App, HttpResponse, HttpServer};

// 定义一个共享数据结构
struct AppState {
    counter: usize,
}

async fn index(data: web::Data<AppState>) -> HttpResponse {
    // 访问共享数据
    let count = data.counter;
    
    HttpResponse::Ok().body(format!("Counter: {}", count))
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    // 初始化共享数据
    let data = web::Data::new(AppState { counter: 0 });

    HttpServer::new(move || {
        App::new()
            // 将共享数据添加到应用程序的数据容器中
            .app_data(data.clone())
            .route("/", web::get().to(index))
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}

use actix_web::{web, App, HttpResponse, HttpServer, middleware::Logger};

async fn index() -> HttpResponse {
    HttpResponse::Ok().body("Hello, world!")
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            // 添加日志中间件
            .wrap(Logger::default())
            .route("/", web::get().to(index))
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}