mysten_network/callback/
future.rs

1// Copyright (c) Mysten Labs, Inc.
2// SPDX-License-Identifier: Apache-2.0
3
4use super::ResponseBody;
5use super::ResponseHandler;
6use http::Response;
7use pin_project_lite::pin_project;
8use std::{
9    future::Future,
10    pin::Pin,
11    task::{Context, Poll},
12};
13
14pin_project! {
15    /// Response future for [`Callback`].
16    ///
17    /// [`Callback`]: super::Callback
18    pub struct ResponseFuture<F, ResponseHandler> {
19        #[pin]
20        pub(crate) inner: F,
21        pub(crate) handler: Option<ResponseHandler>,
22    }
23}
24
25impl<Fut, B, E, ResponseHandlerT> Future for ResponseFuture<Fut, ResponseHandlerT>
26where
27    Fut: Future<Output = Result<Response<B>, E>>,
28    B: http_body::Body<Error: std::fmt::Display + 'static>,
29    E: std::fmt::Display + 'static,
30    ResponseHandlerT: ResponseHandler,
31{
32    type Output = Result<Response<ResponseBody<B, ResponseHandlerT>>, 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 mut 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(
44                    head,
45                    ResponseBody {
46                        inner: body,
47                        handler,
48                    },
49                ))
50            }
51            Err(error) => {
52                handler.on_error(&error);
53                Err(error)
54            }
55        };
56
57        Poll::Ready(result)
58    }
59}
mysten_network/callback/future.rs

mysten_network/callback/
future.rs
