From 0992071a7f1a36424bcfaf1fbc84541ea041df1a Mon Sep 17 00:00:00 2001
From: hozan23 <hozan23@karyontech.net>
Date: Thu, 11 Apr 2024 10:19:20 +0200
Subject: add support for tokio & improve net crate api

---
 net/src/stream/websocket.rs | 107 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 net/src/stream/websocket.rs

(limited to 'net/src/stream/websocket.rs')

diff --git a/net/src/stream/websocket.rs b/net/src/stream/websocket.rs
new file mode 100644
index 0000000..2552eaf
--- /dev/null
+++ b/net/src/stream/websocket.rs
@@ -0,0 +1,107 @@
+use std::{
+    pin::Pin,
+    task::{Context, Poll},
+};
+
+use async_tungstenite::tungstenite::Message;
+use futures_util::{Sink, SinkExt, Stream, StreamExt};
+
+#[cfg(feature = "smol")]
+use futures_rustls::TlsStream;
+#[cfg(feature = "tokio")]
+use tokio_rustls::TlsStream;
+
+use karyon_core::async_runtime::net::TcpStream;
+
+use crate::{codec::WebSocketCodec, Error, Result};
+
+#[cfg(feature = "tokio")]
+type WebSocketStream<T> =
+    async_tungstenite::WebSocketStream<async_tungstenite::tokio::TokioAdapter<T>>;
+#[cfg(feature = "smol")]
+use async_tungstenite::WebSocketStream;
+
+pub struct WsStream<C> {
+    inner: InnerWSConn,
+    codec: C,
+}
+
+impl<C> WsStream<C>
+where
+    C: WebSocketCodec,
+{
+    pub fn new_ws(conn: WebSocketStream<TcpStream>, codec: C) -> Self {
+        Self {
+            inner: InnerWSConn::Plain(conn),
+            codec,
+        }
+    }
+
+    pub fn new_wss(conn: WebSocketStream<TlsStream<TcpStream>>, codec: C) -> Self {
+        Self {
+            inner: InnerWSConn::Tls(conn),
+            codec,
+        }
+    }
+
+    pub async fn recv(&mut self) -> Result<C::Item> {
+        match self.inner.next().await {
+            Some(msg) => self.codec.decode(&msg?),
+            None => Err(Error::IO(std::io::ErrorKind::ConnectionAborted.into())),
+        }
+    }
+
+    pub async fn send(&mut self, msg: C::Item) -> Result<()> {
+        let ws_msg = self.codec.encode(&msg)?;
+        self.inner.send(ws_msg).await
+    }
+}
+
+enum InnerWSConn {
+    Plain(WebSocketStream<TcpStream>),
+    Tls(WebSocketStream<TlsStream<TcpStream>>),
+}
+
+impl Sink<Message> for InnerWSConn {
+    type Error = Error;
+
+    fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
+        match &mut *self {
+            InnerWSConn::Plain(s) => Pin::new(s).poll_ready(cx).map_err(Error::from),
+            InnerWSConn::Tls(s) => Pin::new(s).poll_ready(cx).map_err(Error::from),
+        }
+    }
+
+    fn start_send(mut self: Pin<&mut Self>, item: Message) -> Result<()> {
+        match &mut *self {
+            InnerWSConn::Plain(s) => Pin::new(s).start_send(item).map_err(Error::from),
+            InnerWSConn::Tls(s) => Pin::new(s).start_send(item).map_err(Error::from),
+        }
+    }
+
+    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
+        match &mut *self {
+            InnerWSConn::Plain(s) => Pin::new(s).poll_flush(cx).map_err(Error::from),
+            InnerWSConn::Tls(s) => Pin::new(s).poll_flush(cx).map_err(Error::from),
+        }
+    }
+
+    fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>> {
+        match &mut *self {
+            InnerWSConn::Plain(s) => Pin::new(s).poll_close(cx).map_err(Error::from),
+            InnerWSConn::Tls(s) => Pin::new(s).poll_close(cx).map_err(Error::from),
+        }
+        .map_err(Error::from)
+    }
+}
+
+impl Stream for InnerWSConn {
+    type Item = Result<Message>;
+
+    fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
+        match &mut *self {
+            InnerWSConn::Plain(s) => Pin::new(s).poll_next(cx).map_err(Error::from),
+            InnerWSConn::Tls(s) => Pin::new(s).poll_next(cx).map_err(Error::from),
+        }
+    }
+}
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