rust rocket读取自定义配置

Posted 2023-06-09 风的低吟

Rocket.toml

[default.app]
meili_url = "http://host:port/"
meili_master_key = "key"

main.rs

#[derive(Serialize, Deserialize, Clone)]
#[serde(crate = "rocket::serde")]
struct AppConfig
  meili_url: String,
  meili_master_key: String,

let fairing = AdHoc::on_ignite("load app config!", |rocket| async move
let app_config = match rocket.figment().focus("app").extract::<AppConfig>()
  Ok(a) => a,
  Err(e) =>
     panic!("load app config error::?", e);
 
;
let client = Client::new(app_config.meili_url, Some(app_config.meili_master_key));
  rocket.manage(client)
);
rocket::build()
  .attach(fairing)

 

Rust 的 Rocket Web 框架如何使用共享变量？

【中文标题】Rust 的 Rocket Web 框架如何使用共享变量？

【英文标题】：How to use shared variables Rust's Rocket web framework?

【发布时间】：2022-01-14 12:06:32

【问题描述】：

我正在尝试在路由函数中使用共享资源，例如在我的 hello() 函数中访问变量“shared_resource”

#[launch]
fn rocket() -> _ 
    let shared_resource = SharedResource::new()
    rocket::build().mount("/", routes![hello])


#[get("/")]
fn hello() -> &'static str 
    let _ = shared_resource.some_method()
    "Hello, world!"

我如何做到这一点？

【参考方案1】：

您可以为此使用rocket::State。

只要SharedResource 实现Send + Sync + 'static 并在启动时初始化，这将起作用。

示例

#[launch]
fn rocket() -> _ 
    let shared_resource = SharedResource::new()
    rocket::build()
        .mount("/", routes![hello])
        .manage(shared_resource)


#[get("/")]
fn hello(shared_resource: State<SharedResource>) -> &'static str 
    let _ = shared_resource.some_method()
    "Hello, world!"