use futures::{Stream, AsyncRead};
use std::task::{Context, Poll};
use std::pin::Pin;
use actix_web::web::Bytes;
use std::io::Error;

struct ToStream<T>(T);

impl <T : AsyncRead> Stream for ToStream<T>{
    type Item = Result<Bytes, Error>;

    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
        let mut buff: [u8; 1024] = [0; 1024];
        self.0.poll_read(cx, &mut buff[..]).map_ok(|l| {Bytes::copy_from_slice(&buff[0..l])}) // il manque Option
    }
}