Plugable filter for logging request body using Warp

warp_log_body.rs

// warp version 0.2.2
use warp::{Filter, Rejection};
use bytes::{Bytes, Buf};

#[tokio::main]
async fn main() {

    let port: u16 = 8080;

    let api = warp::any()
        .and(log_body())
        .and_then(handle);
    
    let server_future = warp::serve(api).run(([0, 0, 0, 0], port.clone()));

    server_future.await;
}

fn log_body() -> impl Filter<Extract = (), Error = Rejection> + Copy {
    warp::body::bytes()
        .map(|b: Bytes| {
            println!("Request body: {}", std::str::from_utf8(b.bytes()).expect("error converting bytes to &str"));
        })
        .untuple_one()
}

async fn handle() -> Result<impl warp::Reply, warp::Rejection> {
    Ok(warp::reply::reply())
}