use futures_util::{SinkExt, StreamExt};
use log::*;
use std::{net::SocketAddr, time::Duration};
use tokio::net::{TcpListener, TcpStream};
use tokio_tungstenite::{accept_async, tungstenite::Error};
use tungstenite::{Message, Result};
async fn accept_connection(peer: SocketAddr, stream: TcpStream) {
if let Err(e) = handle_connection(peer, stream).await {
match e {
Error::ConnectionClosed | Error::Protocol(_) | Error::Utf8 => (),
err => error!("Error processing connection: {}", err),
}
}
}
async fn handle_connection(peer: SocketAddr, stream: TcpStream) -> Result<()> {
let ws_stream = accept_async(stream).await.expect("Failed to accept");
info!("New WebSocket connection: {}", peer);
let (mut ws_sender, mut ws_receiver) = ws_stream.split();
let mut interval = tokio::time::interval(Duration::from_millis(1000));
loop {
tokio::select! {
msg = ws_receiver.next() => {
match msg {
Some(msg) => {
let msg = msg?;
if msg.is_text() ||msg.is_binary() {
ws_sender.send(msg).await?;
} else if msg.is_close() {
break;
}
}
None => break,
}
}
_ = interval.tick() => {
ws_sender.send(Message::Text("tick".to_owned())).await?;
}
}
}
Ok(())
}
#[tokio::main]
async fn main() {
env_logger::init();
let addr = "127.0.0.1:9002";
let listener = TcpListener::bind(&addr).await.expect("Can't listen");
info!("Listening on: {}", addr);
while let Ok((stream, _)) = listener.accept().await {
let peer = stream.peer_addr().expect("connected streams should have a peer address");
info!("Peer address: {}", peer);
tokio::spawn(accept_connection(peer, stream));
}
}