Function async_compat

pub fn async_compat<F, P, R, O, E>(
    f: F,
) -> impl Fn(P) -> Compat<Pin<Box<dyn Future<Output = Result<O, E>>>>> + Clone
where
    F: Fn(P) -> R + Clone + 'static,
    P: 'static,
    R: Future<Output = Result<O, E>> + 'static,
    O: 'static,
    E: 'static,

Convert a async fn into a actix-web handler.

use actix_web::{web, App, HttpResponse, Error};
use std::time::{Instant, Duration};
use tokio::timer::Delay;
use actix_web_async_compat::async_compat;

async fn index() -> Result<HttpResponse, Error> {
    // wait 2s
    Delay::new(Instant::now() + Duration::from_secs(2)).await?;
    ok(HttpResponse::Ok().finish())
}

App::new().service(web::resource("/").route(
    web::to_async(async_compat(index)))
);