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extern crate byteorder; extern crate oxygengine_core as core; extern crate oxygengine_network as network; extern crate ws; pub mod prelude { pub use crate::*; } #[cfg(test)] mod tests; use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt}; use network::{ client::{ClientID, ClientState, MessageID}, server::{Server, ServerID, ServerState}, }; use std::{ collections::{HashMap, VecDeque}, io::{Cursor, Read, Write}, mem::replace, ops::{DerefMut, Range}, sync::{Arc, Mutex}, thread::{spawn, JoinHandle}, }; use ws::{CloseCode, Handler, Handshake, Message, Result, Sender as WsSender, WebSocket}; type MsgData = (ClientID, MessageID, Vec<u8>); #[derive(Clone)] struct Client { id: ClientID, ws: WsSender, state: ClientState, messages: VecDeque<MsgData>, } struct ClientHandler { client: Arc<Mutex<Client>>, } impl Handler for ClientHandler { fn on_open(&mut self, _: Handshake) -> Result<()> { self.client.lock().unwrap().state = ClientState::Open; Ok(()) } fn on_message(&mut self, msg: Message) -> Result<()> { if let Message::Binary(msg) = msg { let size = msg.len(); if size >= 8 { let mut stream = Cursor::new(msg); let id = stream.read_u32::<BigEndian>().unwrap(); let version = stream.read_u32::<BigEndian>().unwrap(); let mut data = Vec::with_capacity(size - 8); stream.read_to_end(&mut data).unwrap(); let mut client = self.client.lock().unwrap(); let client_id = client.id; client .messages .push_back((client_id, MessageID::new(id, version), data)); } } Ok(()) } fn on_close(&mut self, _: CloseCode, _: &str) { let mut client = self.client.lock().unwrap(); client.state = ClientState::Closed; } } pub struct DesktopServer { id: ServerID, state: Arc<Mutex<ServerState>>, clients: Arc<Mutex<HashMap<ClientID, Arc<Mutex<Client>>>>>, clients_ids_cached: Vec<ClientID>, messages: VecDeque<MsgData>, ws: Arc<Mutex<Option<WsSender>>>, thread: Option<JoinHandle<()>>, } impl Drop for DesktopServer { fn drop(&mut self) { self.cleanup(); } } impl DesktopServer { fn cleanup(&mut self) { { *self.state.lock().unwrap() = ServerState::Closed; if let Some(ws) = self.ws.lock().unwrap().deref_mut() { ws.shutdown().unwrap(); } *self.ws.lock().unwrap() = None; } let thread = replace(&mut self.thread, None); if let Some(thread) = thread { thread.join().unwrap(); } } } impl Server for DesktopServer { fn open(url: &str) -> Option<Self> { let url = url.to_owned(); let state = Arc::new(Mutex::new(ServerState::Starting)); let state2 = state.clone(); let clients = Arc::new(Mutex::new(HashMap::default())); let clients2 = clients.clone(); let sender = Arc::new(Mutex::new(None)); let sender2 = sender.clone(); let thread = Some(spawn(move || { let ws = WebSocket::new(|ws| { let id = ClientID::default(); let client = Arc::new(Mutex::new(Client { id, ws, state: ClientState::Connecting, messages: VecDeque::new(), })); clients2.lock().unwrap().insert(id, client.clone()); ClientHandler { client } }) .unwrap(); { *sender2.lock().unwrap() = Some(ws.broadcaster()); *state2.lock().unwrap() = ServerState::Open; } ws.listen(&url).unwrap(); { *sender2.lock().unwrap() = None; *state2.lock().unwrap() = ServerState::Closed; } })); Some(Self { id: Default::default(), state, clients, clients_ids_cached: vec![], messages: Default::default(), ws: sender, thread, }) } fn close(mut self) -> Self { self.cleanup(); self } fn id(&self) -> ServerID { self.id } fn state(&self) -> ServerState { *self.state.lock().unwrap() } fn clients(&self) -> &[ClientID] { &self.clients_ids_cached } fn disconnect(&mut self, id: ClientID) { let mut clients = self.clients.lock().unwrap(); if let Some(client) = clients.get_mut(&id) { let client = client.lock().unwrap(); client.ws.close(CloseCode::Normal).unwrap(); client.ws.shutdown().unwrap(); } clients.remove(&id); } fn disconnect_all(&mut self) { let mut clients = self.clients.lock().unwrap(); for client in clients.values() { let client = client.lock().unwrap(); client.ws.close(CloseCode::Normal).unwrap(); client.ws.shutdown().unwrap(); } clients.clear(); } fn send(&mut self, id: ClientID, msg_id: MessageID, data: &[u8]) -> Option<Range<usize>> { if self.state() != ServerState::Open { return None; } let mut clients = self.clients.lock().unwrap(); if let Some(client) = clients.get_mut(&id) { let size = data.len(); let mut stream = Cursor::new(Vec::<u8>::with_capacity(size + 8)); drop(stream.write_u32::<BigEndian>(msg_id.id())); drop(stream.write_u32::<BigEndian>(msg_id.version())); drop(stream.write(data)); let data = stream.into_inner(); let client = client.lock().unwrap(); if client.state == ClientState::Open && client.ws.send(Message::Binary(data)).is_ok() { return Some(0..size); } } None } fn send_all(&mut self, id: MessageID, data: &[u8]) { if self.state() != ServerState::Open { return; } let size = data.len(); let mut stream = Cursor::new(Vec::<u8>::with_capacity(size + 8)); drop(stream.write_u32::<BigEndian>(id.id())); drop(stream.write_u32::<BigEndian>(id.version())); drop(stream.write(data)); let data = stream.into_inner(); if let Some(ws) = self.ws.lock().unwrap().deref_mut() { ws.send(Message::Binary(data)).unwrap(); } } fn read(&mut self) -> Option<MsgData> { self.messages.pop_front() } fn read_all(&mut self) -> Vec<MsgData> { let result = self.messages.iter().cloned().collect(); self.messages.clear(); result } fn process(&mut self) { let mut clients = self.clients.lock().unwrap(); for client in clients.values() { self.messages.append(&mut client.lock().unwrap().messages); } clients.retain(|_, client| client.lock().unwrap().state != ClientState::Closed); self.clients_ids_cached.clear(); for id in clients.keys() { self.clients_ids_cached.push(*id); } } }