Function roa_core::join_all

pub fn join_all<S: State>(
    middlewares: Vec<Arc<dyn Middleware<S>>>
) -> impl Middleware<S>

Join all middlewares in a vector.

All middlewares would be composed and executed in a stack-like manner.

Example

use roa_core::{join_all, App, Middleware, Next};
use async_std::task::spawn;
use futures::lock::Mutex;
use http::StatusCode;
use std::sync::Arc;

#[tokio::test]
async fn middleware_order() -> Result<(), Box<dyn std::error::Error>> {
    let vector = Arc::new(Mutex::new(Vec::new()));
    let mut middlewares = Vec::<Arc<dyn Middleware<()>>>::new();
    for i in 0..100 {
        let vec = vector.clone();
        middlewares.push(Arc::new(move |_ctx, next: Next| {
            let vec = vec.clone();
            async move {
                vec.lock().await.push(i);
                next().await?;
                vec.lock().await.push(i);
                Ok(())
            }
        }));
    }
    let (addr, server) = App::new(()).gate(join_all(middlewares)).run_local()?;
    spawn(server);
    let resp = reqwest::get(&format!("http://{}", addr)).await?;
    assert_eq!(StatusCode::OK, resp.status());
    for i in 0..100 {
        assert_eq!(i, vector.lock().await[i]);
        assert_eq!(i, vector.lock().await[199 - i]);
    }
    Ok(())
}