rollo 0.13.6

A Rust-based multiplayer framework.
Documentation 
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#![cfg(feature = "full")]
use async_trait::async_trait;
use bytes::{BufMut, BytesMut};
use rollo::{
    error::Error,
    packet::Packet,
    server::{ListenerSecurity, SocketTools, World, WorldSession, WorldSocketMgr},
};
use std::{sync::Arc, time::Duration};
use tokio::{
    io::{AsyncReadExt, AsyncWriteExt},
    net::TcpStream,
    task::JoinHandle,
    time::sleep,
};

#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
async fn test_latency() {
    setup(6666).await;
    sleep(Duration::from_secs(1)).await;

    let mut connect = TcpStream::connect("127.0.0.1:6666").await.unwrap();
    connect.set_nodelay(true).unwrap();

    connect.write_all(&latency_packet().to_vec()).await.unwrap();

    let size = connect.read_u32().await.unwrap();
    let cmd = connect.read_u16().await.unwrap();
    let date = connect.read_u64().await.unwrap();
    let latency = connect.read_i64().await.unwrap();

    assert_eq!(size, 16);
    assert_eq!(cmd, 0);
    assert_eq!(date, 1625663748);
    assert_eq!(latency, 26);

    connect.write_all(&message_packet()).await.unwrap();

    connect.read_u32().await.unwrap();
}

fn latency_packet() -> BytesMut {
    let mut bytes = BytesMut::new();
    bytes.put_u32(16);
    bytes.put_u16(0);
    bytes.put_u64(1625663748);
    bytes.put_i64(26);

    bytes
}

fn message_packet() -> BytesMut {
    let mut bytes = BytesMut::new();
    bytes.put_u32(4);
    bytes.put_u16(6);
    bytes.put_u32(2021);

    bytes
}

async fn setup(port: u32) -> JoinHandle<()> {
    let world = Box::new(MyWorld {});
    let world = Box::leak(world);
    let mut server = WorldSocketMgr::new(world);

    tokio::spawn(async move {
        server
            .start_network(format!("127.0.0.1:{}", port), ListenerSecurity::Tcp)
            .await
            .unwrap();
    })
}

struct MyWorldSession {
    socket_tools: SocketTools,
}

#[async_trait]
impl WorldSession<MyWorld> for MyWorldSession {
    async fn on_open(
        tools: SocketTools,
        _world: &'static MyWorld,
    ) -> Result<std::sync::Arc<Self>, Error> {
        Ok(Arc::new(Self {
            socket_tools: tools,
        }))
    }

    fn socket_tools(&self) -> &SocketTools {
        &self.socket_tools
    }

    async fn on_message(world_session: &Arc<Self>, _world: &'static MyWorld, packet: Packet) {
        assert_eq!(world_session.socket_tools().get_latency(), 26);
        assert_eq!(packet.cmd, 6);
        assert!(packet.payload.is_some());
        world_session.socket_tools.send(packet.cmd, None);
    }

    async fn on_close(_world_session: &Arc<Self>, _world: &'static MyWorld) {}
}

struct MyWorld {}

impl World for MyWorld {
    type WorldSessionimplementer = MyWorldSession;
}