CORS

CORS 中间件可以用于 跨域资源共享在新窗口打开.

由于浏览器会发 Method::OPTIONS 的请求, 所以需要增加对此类请求的处理. 可以对根 Router 添加 empty_handler 一劳永逸地处理这种情况.

配置 Cargo.toml

salvo = { version = "*", features = ["cors"] }

示例代码

use salvo::prelude::*;
use salvo_extra::cors::Cors;

#[handler]
async fn hello() -> &'static str {
    "hello"
}

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

    let cors_handler = Cors::builder()
        .with_allow_origin("https://salvo.rs")
        .with_allow_methods(vec!["GET", "POST", "DELETE"])
        .build();

    let router = Router::with_hoop(cors_handler).get(hello).options(empty_handler);
    Server::new(TcpListener::bind("127.0.0.1:7878")).serve(router).await;
}