Request Id

Request Id 中间件是比较灵活的，生成器(IdGenerator) 用于生成 ID, 可以定义自己的 ID 生成器，只要实现 IdGenerator 这个 trait. 默认提供生成器是 UlidGenerator.

另外你可以控制是否覆盖现在的已经存在的 requestid. 还可以设置 header_name 等, 具体请查看文档.

示例代码

use salvo::prelude::*;

#[handler]
async fn hello(req: &mut Request) -> String {
    format!("Request id: {:?}", req.header::<String>("x-request-id"))
}

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

    let acceptor = TcpListener::new("0.0.0.0:5800").bind().await;
    let router = Router::new().hoop(RequestId::new()).get(hello);
    Server::new(acceptor).serve(router).await;
}

[package]
name = "example-request-id"
version.workspace = true
edition.workspace = true
publish.workspace = true

[dependencies]
salvo = { workspace = true, features = ["request-id"]}
tokio = { workspace = true, features = ["macros"] }
tracing.workspace = true
tracing-subscriber.workspace = true