iota_network_stack/callback/
future.rs

1// Copyright (c) Mysten Labs, Inc.
2// Modifications Copyright (c) 2024 IOTA Stiftung
3// SPDX-License-Identifier: Apache-2.0
4
5use std::{
6    future::Future,
7    pin::Pin,
8    task::{Context, Poll},
9};
10
11use http::Response;
12use pin_project_lite::pin_project;
13
14use super::ResponseHandler;
15
16pin_project! {
17    /// Response future for [`Callback`].
18    ///
19    /// [`Callback`]: super::Callback
20    pub struct ResponseFuture<F, ResponseHandler> {
21        #[pin]
22        pub(crate) inner: F,
23        pub(crate) handler: Option<ResponseHandler>,
24    }
25}
26
27impl<Fut, B, E, ResponseHandlerT> Future for ResponseFuture<Fut, ResponseHandlerT>
28where
29    Fut: Future<Output = Result<Response<B>, E>>,
30    ResponseHandlerT: ResponseHandler,
31{
32    type Output = Result<Response<B>, E>;
33
34    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
35        let this = self.project();
36        let result = futures::ready!(this.inner.poll(cx));
37        let handler = this.handler.take().unwrap();
38
39        let result = match result {
40            Ok(response) => {
41                let (head, body) = response.into_parts();
42                handler.on_response(&head);
43                Ok(Response::from_parts(head, body))
44            }
45            Err(error) => {
46                handler.on_error(&error);
47                Err(error)
48            }
49        };
50
51        Poll::Ready(result)
52    }
53}
iota_network_stack/callback/future.rs

iota_network_stack/callback/
future.rs
