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use std::net::SocketAddr;
use async_trait::async_trait;
use smol::{
io::{split, AsyncReadExt, AsyncWriteExt, ReadHalf, WriteHalf},
lock::Mutex,
net::{TcpListener, TcpStream},
};
use ws_stream_tungstenite::WsStream;
use crate::{
connection::{Connection, ToConn},
endpoint::Endpoint,
listener::{ConnListener, ToListener},
Error, Result,
};
/// WS network connection implementation of the [`Connection`] trait.
pub struct WsConn {
inner: TcpStream,
read: Mutex<ReadHalf<WsStream<TcpStream>>>,
write: Mutex<WriteHalf<WsStream<TcpStream>>>,
}
impl WsConn {
/// Creates a new WsConn
pub fn new(inner: TcpStream, conn: WsStream<TcpStream>) -> Self {
let (read, write) = split(conn);
Self {
inner,
read: Mutex::new(read),
write: Mutex::new(write),
}
}
}
#[async_trait]
impl Connection for WsConn {
fn peer_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_ws_addr(&self.inner.peer_addr()?))
}
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_ws_addr(&self.inner.local_addr()?))
}
async fn read(&self, buf: &mut [u8]) -> Result<usize> {
self.read.lock().await.read(buf).await.map_err(Error::from)
}
async fn write(&self, buf: &[u8]) -> Result<usize> {
self.write
.lock()
.await
.write(buf)
.await
.map_err(Error::from)
}
}
/// Ws network listener implementation of the `Listener` [`ConnListener`] trait.
pub struct WsListener {
inner: TcpListener,
}
#[async_trait]
impl ConnListener for WsListener {
fn local_endpoint(&self) -> Result<Endpoint> {
Ok(Endpoint::new_ws_addr(&self.inner.local_addr()?))
}
async fn accept(&self) -> Result<Box<dyn Connection>> {
let (stream, _) = self.inner.accept().await?;
let conn = async_tungstenite::accept_async(stream.clone()).await?;
Ok(Box::new(WsConn::new(stream, WsStream::new(conn))))
}
}
/// Connects to the given WS address and port.
pub async fn dial(endpoint: &Endpoint) -> Result<WsConn> {
let addr = SocketAddr::try_from(endpoint.clone())?;
let stream = TcpStream::connect(addr).await?;
let (conn, _resp) =
async_tungstenite::client_async(endpoint.to_string(), stream.clone()).await?;
Ok(WsConn::new(stream, WsStream::new(conn)))
}
/// Listens on the given WS address and port.
pub async fn listen(endpoint: &Endpoint) -> Result<WsListener> {
let addr = SocketAddr::try_from(endpoint.clone())?;
let listener = TcpListener::bind(addr).await?;
Ok(WsListener { inner: listener })
}
impl From<WsListener> for Box<dyn ConnListener> {
fn from(listener: WsListener) -> Self {
Box::new(listener)
}
}
impl ToConn for WsConn {
fn to_conn(self) -> Box<dyn Connection> {
Box::new(self)
}
}
impl ToListener for WsListener {
fn to_listener(self) -> Box<dyn ConnListener> {
self.into()
}
}
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