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use std::{io::Error, thread, time::Duration};
use futures_util::{SinkExt, StreamExt};
use log::debug;
use once_cell::sync::Lazy;
use tokio::{
net::{TcpListener, TcpStream},
runtime::Builder,
};
pub static WS_ECHO: Lazy<bool> = Lazy::new(init);
fn init() -> bool {
thread::spawn(move || {
let runtime = Builder::new_current_thread()
.thread_name("websocket echo")
.enable_all()
.build()
.unwrap();
runtime.block_on(async move {
server("127.0.0.1:9283").await.unwrap();
})
});
thread::sleep(Duration::from_millis(200));
true
}
async fn server(addr: &str) -> Result<(), Error> {
let listener = TcpListener::bind(&addr).await.unwrap();
while let Ok((stream, _)) = listener.accept().await {
tokio::spawn(handle_connection(stream));
}
Ok(())
}
async fn handle_connection(stream: TcpStream) {
let mut ws_stream = tokio_tungstenite::accept_async(stream).await.unwrap();
while let Some(msg) = ws_stream.next().await {
let msg = msg.unwrap();
let echo = msg.clone();
if msg.is_text() {
let data = msg.into_text().unwrap();
if data.contains("close") {
// abruptly close the stream without WS close;
debug!("abrupt close");
return;
} else if data.contains("graceful") {
debug!("graceful close");
ws_stream.close(None).await.unwrap();
// close() only sends frame
return;
} else {
ws_stream.send(echo).await.unwrap();
}
}
}
}
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