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#![cfg(unix)]
#![warn(rust_2018_idioms)]
use tokio::net::unix::*;
use std::io;
// struct StringDatagramCodec;
// /// A codec to decode datagrams from a unix domain socket as utf-8 text messages.
// impl Encoder for StringDatagramCodec {
// type Item = String;
// type Error = io::Error;
// fn encode(&mut self, item: Self::Item, dst: &mut BytesMut) -> Result<(), Self::Error> {
// dst.extend_from_slice(&item.into_bytes());
// Ok(())
// }
// }
// /// A codec to decode datagrams from a unix domain socket as utf-8 text messages.
// impl Decoder for StringDatagramCodec {
// type Item = String;
// type Error = io::Error;
// fn decode(&mut self, buf: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
// let decoded = str::from_utf8(buf)
// .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?
// .to_string();
// Ok(Some(decoded))
// }
// }
async fn echo_server(mut socket: UnixDatagram) -> io::Result<()> {
let mut recv_buf = vec![0u8; 1024];
loop {
let (len, peer_addr) = socket.recv_from(&mut recv_buf[..]).await?;
if let Some(path) = peer_addr.as_pathname() {
socket.send_to(&recv_buf[..len], path).await?;
}
}
}
#[tokio::test]
async fn echo() -> io::Result<()> {
let dir = tempfile::tempdir().unwrap();
let server_path = dir.path().join("server.sock");
let client_path = dir.path().join("client.sock");
let server_socket = UnixDatagram::bind(server_path.clone())?;
tokio::spawn(async move {
if let Err(e) = echo_server(server_socket).await {
eprintln!("Error in echo server: {}", e);
}
});
{
let mut socket = UnixDatagram::bind(&client_path).unwrap();
socket.connect(server_path)?;
socket.send(b"ECHO").await?;
let mut recv_buf = [0u8; 16];
let len = socket.recv(&mut recv_buf[..]).await?;
assert_eq!(&recv_buf[..len], b"ECHO");
}
Ok(())
}
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