actix-sse 0.1.0

Actix-web SSE implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

use std::convert::Infallible;
use std::pin::Pin;
use std::task::{Context, Poll, ready};

use futures_core::Stream;

pin_project_lite::pin_project! {
    /// Converts stream with item `T` into `Result<T, Infallible>`.
    pub struct InfallibleStream<S> {
        #[pin]
        stream: S,
    }
}

impl<S> InfallibleStream<S> {
    pub fn new(stream: S) -> Self {
        Self { stream }
    }
}

impl<S: Stream> Stream for InfallibleStream<S> {
    type Item = Result<S::Item, Infallible>;

    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
        Poll::Ready(ready!(self.project().stream.poll_next(cx)).map(Ok))
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.stream.size_hint()
    }
}