mirror of
https://github.com/fafhrd91/actix-net
synced 2024-11-24 03:42:59 +01:00
101 lines
2.5 KiB
Rust
101 lines
2.5 KiB
Rust
use std::future::Future;
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use std::pin::Pin;
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use std::task::{Context, Poll};
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use actix_service::{IntoService, Service};
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use futures::Stream;
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use crate::mpsc;
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#[pin_project::pin_project]
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pub struct StreamDispatcher<S, T>
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where
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S: Stream,
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T: Service<Request = S::Item, Response = ()> + 'static,
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{
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#[pin]
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stream: S,
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service: T,
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err_rx: mpsc::Receiver<T::Error>,
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err_tx: mpsc::Sender<T::Error>,
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}
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impl<S, T> StreamDispatcher<S, T>
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where
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S: Stream,
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T: Service<Request = S::Item, Response = ()> + 'static,
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{
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pub fn new<F>(stream: S, service: F) -> Self
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where
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F: IntoService<T>,
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{
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let (err_tx, err_rx) = mpsc::channel();
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StreamDispatcher {
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err_rx,
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err_tx,
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stream,
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service: service.into_service(),
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}
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}
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}
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impl<S, T> Future for StreamDispatcher<S, T>
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where
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S: Stream,
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T: Service<Request = S::Item, Response = ()> + 'static,
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{
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type Output = Result<(), T::Error>;
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fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let mut this = self.as_mut().project();
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if let Poll::Ready(Some(e)) = Pin::new(&mut this.err_rx).poll_next(cx) {
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return Poll::Ready(Err(e));
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}
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loop {
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match this.service.poll_ready(cx)? {
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Poll::Ready(_) => match this.stream.poll_next(cx) {
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Poll::Ready(Some(item)) => {
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actix_rt::spawn(StreamDispatcherService {
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fut: this.service.call(item),
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stop: self.err_tx.clone(),
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});
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this = self.as_mut().project();
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}
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Poll::Pending => return Poll::Pending,
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Poll::Ready(None) => return Poll::Ready(Ok(())),
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},
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Poll::Pending => return Poll::Pending,
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}
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}
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}
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}
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#[pin_project::pin_project]
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struct StreamDispatcherService<F: Future, E> {
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#[pin]
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fut: F,
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stop: mpsc::Sender<E>,
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}
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impl<F, E> Future for StreamDispatcherService<F, E>
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where
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F: Future<Output = Result<(), E>>,
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{
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type Output = ();
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
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let this = self.project();
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match this.fut.poll(cx) {
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Poll::Ready(Ok(_)) => Poll::Ready(()),
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Poll::Pending => Poll::Pending,
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Poll::Ready(Err(e)) => {
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let _ = this.stop.send(e);
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Poll::Ready(())
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}
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}
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}
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}
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