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|
use websocket::{OwnedMessage,
sync::Server,
client::sync::Client,
server::{NoTlsAcceptor, InvalidConnection,
sync::AcceptResult}};
use std::net::{SocketAddr, ToSocketAddrs, TcpStream};
use std::sync::mpsc;
use std::sync::mpsc::{Sender, Receiver};
use super::lobby::Lobby;
use super::backend_connection::BackendConnection;
const PROTOCOL: &str = "tuesday";
type Token = u32;
#[derive(Debug)]
pub enum GameServerError {
BindError(std::io::Error),
HandshakeRequestError,
InvalidProtocolError,
AcceptError(std::io::Error)
}
pub struct GameServer {
addr: SocketAddr,
lobby: Lobby,
backend: BackendConnection,
}
pub struct GameClient {
addr: SocketAddr,
client: Client<TcpStream>,
}
impl GameClient {
fn from_raw(client: Client<TcpStream>) -> Result<Self, ()> {
let addr = client.peer_addr().map_err(|_| ())?;
info!("got a client connection from: {}", addr);
Ok(GameClient {
addr,
client,
})
}
fn require_token(&mut self) -> Option<Token> {
let message = self.client
.recv_message()
.ok()?;
if let OwnedMessage::Text(text) = message {
text.parse::<Token>().ok()
} else {
None
}
}
}
type ClientConnection = Result<GameClient, GameServerError>;
impl GameServer {
pub fn new<T: ToSocketAddrs>(addr: T) -> Self {
let addr = addr.to_socket_addrs().unwrap().next().unwrap();
debug!("ws address: {}", addr);
info!("create lobby");
let lobby = Lobby::new();
let backend = BackendConnection::new("https://kobert.dev");
info!("got a C# backend connection");
GameServer {
addr,
lobby,
backend,
}
}
pub fn run(&self) -> Result<(), GameServerError> {
let reader = self.read_clients();
loop {
let mut connection = reader.recv().unwrap()?;
self.add_client(connection);
}
Ok(())
}
fn add_client(&self, mut client: GameClient) {
std::thread::spawn(move || {
println!("Token: {:?}", client.require_token());
loop { std::thread::sleep(std::time::Duration::from_millis(100)); }
});
}
fn read_clients(&self) -> Receiver<ClientConnection> {
let (s, r): (Sender<ClientConnection>, Receiver<ClientConnection>)
= mpsc::channel();
let addr = self.addr;
std::thread::spawn(move || {
let result = Self::handle_requests(addr, &s).or_else(|e| s.send(Err(e)));
});
r
}
fn handle_requests(addr: SocketAddr, s: &Sender<ClientConnection>) -> Result<(), GameServerError> {
let server = match Server::<NoTlsAcceptor>::bind(addr) {
Ok(v) => v,
Err(e) => {
error!("websocket binding error");
Err(GameServerError::BindError(e))?
},
};
info!("webserver is being launched");
for req in server {
s.send(Ok(Self::handle_request(req)?)).unwrap();
}
info!("webserver is being shut down");
Ok(())
}
fn handle_request(req: AcceptResult<TcpStream>) -> ClientConnection {
match req {
Ok(req) => {
if !req.protocols().contains(&PROTOCOL.to_string()) {
warn!("a client tried to connect without {} protocol", PROTOCOL);
req.reject().unwrap();
Err(GameServerError::InvalidProtocolError)
} else {
match req.use_protocol(PROTOCOL).accept() {
Ok(client) => {
match GameClient::from_raw(client) {
Ok(client) => Ok(client),
Err(_) => {
error!("could not create a client");
Err(GameServerError::HandshakeRequestError)
}
}
},
Err((_, e)) => {
warn!("client handshake failed");
Err(GameServerError::AcceptError(e))
}
}
}
},
Err(e) => {
warn!("invalid client request");
Err(GameServerError::HandshakeRequestError)
}
}
}
}
|
